Glossary of psychiatry

Short description: List of definitions of terms and concepts commonly used in the study of psychiatry

This glossary covers terms found in the psychiatric literature; the word origins are primarily Greek, but there are also Latin, French, German, and English terms. Many of these terms refer to expressions dating from the early days of psychiatry in Europe.

## Contents

* 1 A
* 1.1 abreaction
* 1.2 abulia
* 1.3 achromatopsia
* 1.4 affect illusion
* 1.5 akataphasia
* 1.6 akathisia
* 1.7 alexithymia
* 1.8 Alice in Wonderland experience
* 1.9 alogia
* 1.10 amok
* 1.11 anhedonia
* 1.12 anosognosia
* 1.13 Anton's syndrome
* 1.14 anwesenheit
* 1.15 apophanous perception
* 1.16 aphemia
* 1.17 apperception
* 1.18 astasia-abasia
* 1.19 asyndesis
* 1.20 autism
* 1.21 autistic thinking
* 1.22 autochthonous delusion
* 1.23 autokabalesis
* 1.24 automatic obedience
* 1.25 automatism
* 1.26 autoscopy
* 1.27 avolition
* 2 B
* 2.1 belle indifference
* 2.2 bouffée délirante
* 2.3 brain fag syndrome
* 2.4 brain fog
* 2.5 bruxism
* 3 C
* 3.1 Capgras' syndrome or illusion des sosies
* 3.2 catalepsy
* 3.3 cataplexy
* 3.4 catatonia
* 3.5 cerea flexibilitas
* 3.6 chorea
* 3.7 circumstantial speech
* 3.8 clang association
* 3.9 Claparede's paradox
* 3.10 clouding of consciousness
* 3.11 coenestopathic state
* 3.12 confabulation
* 3.13 conversion disorder
* 3.14 coprolalia
* 3.15 Cotard delusion
* 4 D
* 4.1 defenestration
* 4.2 déjà vu
* 4.3 déjà pensée
* 4.4 dementia praecox
* 4.5 dementia pugilistica
* 4.6 derailment
* 4.7 dereistic thinking
* 4.8 dermatozoenwahn
* 4.9 dhat
* 4.10 doppelgänger
* 5 E
* 5.1 écho de la pensée
* 5.2 entgleisen
* 5.3 extracampine
* 6 F
* 6.1 fantasy
* 6.2 fatuous affect
* 6.3 flight of ideas
* 6.4 folie à deux
* 6.5 Fregoli delusion
* 7 G
* 7.1 gedankenlautwerden
* 7.2 gegenhalten
* 8 H
* 8.1 hemiasomatognosia
* 8.2 hyposchemazia; aschemazia
* 9 I
* 9.1 idée fixe
* 9.2 ideas of alienation
* 9.3 ideas of influence
* 9.4 ideas of reference
* 9.5 illusion
* 10 J
* 10.1 jargon aphasia
* 11 K
* 11.1 Klüver–Bucy syndrome
* 11.2 knight's move thinking
* 11.3 koro
* 11.4 kuru
* 12 L
* 12.1 latah
* 12.2 l'homme qui rit
* 12.3 Lilliputian hallucinations
* 12.4 logoclonia
* 12.5 logorrhoea
* 13 M
* 13.1 mania
* 13.2 mania a potu
* 13.3 metonymy
* 13.4 mitgehen
* 13.5 mitmachen
* 13.6 moria
* 14 N
* 14.1 negativism
* 14.2 neologism
* 15 O
* 15.1 omega sign
* 15.2 oneiroid state
* 15.3 oneirophrenia
* 15.4 overvalued idea
* 16 P
* 16.1 palilalia
* 16.2 palinacousis
* 16.3 palinopsia
* 16.4 parapraxis
* 16.5 paraprosopia
* 16.6 paraschemazia
* 16.7 pareidolia
* 16.8 perseveration
* 16.9 pfropfschizophrenie
* 16.10 piblokto
* 16.11 poverty of ideas
* 16.12 pseudologia fantastica
* 16.13 psychological pillow
* 16.14 psychopathology
* 17 R
* 17.1 rabbit syndrome
* 17.2 reduplicative hallucination
* 17.3 reduplicative paramnesia
* 17.4 reflex hallucination
* 17.5 restlessness
* 17.6 retardation
* 17.7 left–right disorientation
* 18 S
* 18.1 scanning speech
* 18.2 schizophasia
* 18.3 schnauzkrampf
* 18.4 sensitiver beziehungswahn
* 18.5 Stockholm syndrome
* 18.6 synaesthesiae
* 19 T
* 19.1 telegrammatic or telegraphic speech
* 19.2 thought blocking
* 19.3 thought sonorization
* 19.4 torpor
* 19.5 Tourette syndrome
* 19.6 traumatic bonding
* 19.7 trichotillomania
* 20 V
* 20.1 verbigeration
* 20.2 verstimmung
* 20.3 vorbeigehen; vorbeireden
* 21 W
* 21.1 wahneinfall
* 21.2 waxy flexibility
* 21.3 waxy rigidity
* 21.4 Windigo psychosis
* 21.5 witzelsucht
* 21.6 word approximation
* 21.7 word-salad
* 21.8 würgstimme
* 22 Z
* 22.1 zoophilia
* 23 References

## A

### abreaction

Abreaction is a process of vividly reliving repressed memories and emotions related to a past event.[1] Sigmund Freud used hypnosis to rid his patients of pathological memories through abreaction.[1]

### abulia

Aboulia or Abulia, in neurology, refers to a lack of will or initiative. The individual is unable to act or make decisions independently. The condition may range from subtle to overwhelming in severity.

### achromatopsia

Achromatopsia is a term referring to or acquired agnosia for color. This term includes color blindness. Achromatopsia is a condition characterized by a partial or total absence of color vision. People with complete achromatopsia cannot perceive any colors; they see only black, white, and shades of gray. Incomplete achromatopsia is a milder form of the condition that allows some color discrimination.

Achromatopsia also involves other problems with vision, including an increased sensitivity to light and glare (photophobia), involuntary back-and-forth eye movements (nystagmus), and significantly reduced sharpness of vision (low visual acuity). Affected individuals can also have farsightedness (hyperopia) or, less commonly, nearsightedness (myopia). These vision problems develop in the first few months of life.

Achromatopsia is different from the more common forms of color vision deficiency (also called color blindness), in which people can perceive color but have difficulty distinguishing between certain colors, such as red and green.[2]

### affect illusion

Mild illusions or misperceptions associated with changes in mood; e.g. mistaking a shadow for the presence of a person, perceiving movement in peripheral when there is none.

### akataphasia

Akataphasia (Kraepelin 1896) refers to a syntactic disturbance of speech resulting from dissolution of logical ordering of thoughts. It manifests as rambling speech. Compare Derailment.[3]

### akathisia

Main page: Medicine:Akathisia

Akathisia refers to a subjective feeling of restlessness in the lower limbs that is related to abnormal activity in the extrapyramidal system in the brain, often due to antipsychotic medication.[1] It tends to manifest as an inability to sit still.[1]

### alexithymia

Main page: Medicine:Alexithymia

Alexithymia refers to an inability to identify and describe emotions in the self.[4]

### Alice in Wonderland experience

Main page: Unsolved:Alice in Wonderland syndrome

In Alice in Wonderland experience, individuals perceive objects (including animals and other humans, or parts of humans, animals, or objects) as appearing substantially smaller than in reality. Generally, the object appears far away or extremely close at the same time. An alternate term for this is somaesthetic aura. Also see § Lilliputian hallucinations

### alogia

Main page: Medicine:Alogia

Literally, this term means "not having words". The term may refer to either "poverty of speech" or "poverty of thought". In the former, speech, though adequate in verbiage, conveys very little information and may consist of stock phrases or vague references. In poverty of thought, by contrast, there is a far-reaching impoverishment of the entire thinking of the individual, who, as a result, says very little. It is typically a negative symptom of schizophrenia,[1] although it may also be seen in advanced dementia.

### amok

The phrase "running amok" describes the behavior of an individual who is very agitated and may be at danger of causing harm to themselves or others.[5][6] The syndrome of "Amok" is found in the DSM-IV TR.[7]

### anhedonia

Main page: Medicine:Anhedonia

Anhedonia refers to an inability to experience pleasure, and may be described as a feeling of emotional emptiness.[1] It can be a negative symptom of schizophrenia.[1] It also may be seen in severe depressive states and schizoid personality disorder.

### anosognosia

Main page: Medicine:Anosognosia

Anosognosia is a condition in which a person who suffers certain disability seems unaware of the existence of their disability. § Hemiasomatognosia is a subtype of anosognosia in which the person suffering from hemiplegia neglects one half of their body.

### Anton's syndrome

Anton syndrome, occasionally known as Anton-Babinski syndrome, is a form of cortical blindness in which the individual denies the visual impairment. The individual may attempt to walk, bumping into objects and injuring himself. Anton syndrome is caused by damaging the occipital lobes bilaterally or from disrupting the pathway from the primary visual cortex into the visual association cortex.

### anwesenheit

Anwesenheit refers to the false perception of an unfamiliar presence. It is commonly associated with periods of grief, schizophrenia and other emotional disturbances.

### apophanous perception

This is an alternate term for delusional perception. It is one of the Schneiderian first rank symptoms and is defined as a true perception, to which an individual attributes a false meaning.

### aphemia

Aphemia is the alternate term for mutism. Mutism is absence of speech with apparently normal level of consciousness. Mutism can be dissociative (hysterical) in which an individual (commonly a child or adolescent) stops speaking at once without involvement of any neurological or physical contributing factor; or it can be elective (selective) in which a child does not speak at all in certain situations (such as in school) but speaks well in other conditions (like at home or at play). A rare cause of mutism is akinetic mutism which results due to a lesion around the third ventricle of the brain.

### apperception

Apperception is a normal phenomenon and refers to the ability to understand sensory inputs in their context, to interpret them and to incorporate them into experience. Failure of apperception is seen in delirious states.

### astasia-abasia

Main page: Medicine:Astasia-abasia

Astasia-abasia is a form of psychogenic gait disturbance in which gait becomes impaired in the absence of any neurological or physical pathology. The person usually walks in a bizarre manner. They stagger and appear as if going to fall, but always manage to catch hold of something in time. Sometimes these people cannot even stand, but on the other hand they are well able to move their legs while lying down or sitting. Often associated with conversion disorder or somatization disorder.

### asyndesis

Asyndesis means loosening of association. A milder form of derailment of thought, it is marked by the individual leaping from topic to topic which have only the most tenuous, if any, connection with each other. This is in contrast with flight of ideas, whereby the individual's successive ideas may be linked and "understandable" to the listener. See also § Akataphasia and § Entgleisen term introduced by (Cameron).

### autism

Main page: Medicine:Autism

From aut ="self" and -ism = "state or orientation". Originally, Eugen Bleuler used this term to describe schizophrenia. In general, it refers to any (pathological) tendency to be self-absorbed to such a degree that the feelings, thoughts and desires of a person are governed by their internal apprehension of the world and not by an external reality shared with others.

Today the term is used most often to refer to a specific developmental syndrome (see autism spectrum).[8]:p. 76

### autistic thinking

Autistic thinking refers to a cognitive progress that is not in accordance with consensus reality, but rather emphasizes preoccupation with inner experiences and needs. See also § Dereistic thinking. More generally, it means thinking that is driven by internally oriented wishes and desires regardless of external factors.[8]:p. 76

### autochthonous delusion

Main page: Philosophy:Delusional intuition

Jaspers defined this as a delusion arising without apparent cause. For example, suddenly, without apparent cause, having the delusional belief that one is an alien.

### autokabalesis

Autokabalesis is a term for committing suicide by jumping from a very high place.[9]

### automatic obedience

Automatic obedience is an exaggerated co-operation with an examiner's request, as if the individual were an "automaton" robotically obeying a command. It is often a sign of catatonia.

### automatism

Automatisms are sequences of activity that occur without conscious control. They may be simple and repetitive (tic-like) or complex, and are usually natural-looking but purposeless. Automatic behavior is not usually recalled afterwards.

### autoscopy

Autoscopy is the reduplicative hallucination of "seeing one's own body from the outside" while still maintaining an egocentric visuo-spatial perspective. Autoscopy is sometimes used synonymously with out-of-body experience.

### avolition

Main page: Philosophy:Avolition

Avolition is an inability to initiate and complete goal-directed behavior.[1] It can sometimes be misinterpreted as laziness, but it is actually a negative symptom of schizophrenia.

## B

### belle indifference

Belle indifference or la belle indifférence is characterized by a lack of concern and feeling of indifference about a disability or symptom.[1] It can be seen in conversion disorder.

### bouffée délirante

Bouffée délirante is a French term used in the past for acute and transient psychotic disorders (F23 in ICD-10). In DSM-IV, it is described as "brief psychotic disorder" (298.8). The symptoms usually have an acute onset and reach their peak within two weeks. The symptoms start resolving in a few weeks and complete recovery usually occurs within two or three months.[10]

### brain fag syndrome

Brain fag syndrome[11] is an example of a culture-bound syndrome. "Brain fag" was once a common term for mental exhaustion. Today, the syndrome describes students (predominantly males, particularly in West Africa) experiencing symptoms including somatic, sleep-related and cognitive complaints, head and neck pains, difficulty in concentrating and retaining information, and eye pain.

### brain fog

Synonym of § Clouding of consciousness.

### bruxism

Main page: Medicine:Bruxism

Bruxism refers to teeth grinding behavior that is usually seen in children.

## C

### Capgras' syndrome or illusion des sosies

In Capgras syndrome, the individual feels that a person familiar to them, usually a family member, has been replaced by an imposter.[1] This is a type of delusion that can be experienced as part of schizophrenia. Capgras syndrome and several other related disorders are referred to as "delusional misidentification syndrome".

### catalepsy

Main page: Medicine:Catalepsy

Catalepsy is the term for catatonic rigidity of the limbs which often results in abnormal posturing for long intervals.

### cataplexy

Main page: Medicine:Cataplexy

Cataplexy refers to a sudden loss of muscle tone and is commonly precipitated by a strong emotional response.[1]

### catatonia

Main page: Medicine:Catatonia

Catatonia involves a significant psychomotor disturbance, which can occur as catalepsy, stupor, excessive purposeless motor activity, extreme negativism (seemingly motiveless resistance to movement), mutism, echolalia (imitating speech), or echopraxia (imitating movements).[1] There is a catatonic subtype of schizophrenia.[1]

### cerea flexibilitas

Cerea flexibilitas, meaning "waxy flexibility", refers to people allowing themselves to be placed in postures by others, and then maintaining those postures for long periods even if they are obviously uncomfortable.[1] It is characterized by an individual's movements having the feeling of a plastic resistance, as if the person were made of wax. This occurs in catatonic schizophrenia, and a person suffering from this condition can have their limbs placed in fixed positions as if the person were in fact made from wax.

### chorea

Chorea refers to erratic involuntary movements. The term comes from the Greek word "choreia" or "dance" since usually large groups of muscles are involved simulating dance-like movements.

### circumstantial speech

Main page: Medicine:Circumstantial speech

Circumstantial thinking, or circumstantial speech, refers to a person being unable to answer a question without giving excessive, unnecessary detail.[12] This differs from tangential thinking, in that the person does eventually return to the original point, circling back on-topic.

### clang association

Clang associations are ideas that are related only by similar or rhyming sounds rather than actual meaning.[12]

### Claparede's paradox

Claparede's paradox refers to retention of non-verbal and implicit memory in sufferers of Korsakoff's syndrome.[13]

### clouding of consciousness

Clouding of consciousness, also known as brain fog or mental fog, is a global impairment in higher central nervous functioning. All aspects of cognitive functioning are affected. On mental status examinations it is manifest by disorientation in time, place and person, memory difficulties caused by failure to register and recall, aphasia, and agnosia. Impaired perception functioning leads to illusions and hallucinations often in the visual sensory modality. This then causes agitation and distress and secondary delusions. The term confusion state is sometimes used to mean clouding of consciousness, but is avoided whenever possible because it is ambiguous.

### coenestopathic state

Coenestopathic state refers to a situation in which an individual in a coenestopathic state has a localized distortion of body awareness.

### confabulation

Main page: Confabulation

Confabulation is the confusion of imagination with memory, or the confusion of true memories with false memories.

### conversion disorder

Main page: Medicine:Conversion disorder

Conversion disorder involves the unintentional production of symptoms or deficits affecting motor or sensory function that are not fully explained by a neurological or medical condition.[1] This can manifest as paralysis, for example. It generally involves psychological factors, and symptoms may worsen in the context of situational conflict.[1]

### coprolalia

Coprolalia is the involuntary utterance of socially inappropriate phrases. It is a phonic tic associated with Tourette syndrome, although less than 15% of persons with Tourette's have coprolalia.

### Cotard delusion

Main page: Medicine:Cotard delusion

Cotard delusion involves the belief an individual that one or more of their organs has changed in some way, has ceased functioning, or has disappeared entirely.[1] This type of delusion is most commonly seen in patients with schizophrenia.[1]

## D

### defenestration

Defenestration refers to an individual voluntarily ejecting themselves from a window or another elevated position, usually in the context of attempted suicide. Also see § autokabalesis.[14]

### déjà vu

In déjà vu, a person feels undue familiarity to an event or a person.

### déjà pensée

In déjà pensée, a completely new thought is seen as familiar by an individual, as if it had occurred before . The sensation may be caused by a type of convulsion known as a "partial seizure" which occurs in parts of the temporal lobe or other areas of the brain - the individual typically remains conscious throughout.

### dementia praecox

Dementia praecox refers to a chronic, deteriorating psychotic disorder characterized by rapid cognitive disintegration, usually beginning in the late teens or early adulthood.

### dementia pugilistica

Dementia pugilistica, also called "chronic traumatic encephalopathy", "pugilistic Parkinson's syndrome", "boxer's syndrome", and "punch-drunk syndrome", is a neurological disorder which affects career boxers and others who receive multiple dazing blows to the head. The condition develops over a period of years, with the average time of onset being about 16 years after the start of a career in boxing.

### derailment

Main page: Philosophy:Derailment (thought disorder)

Derailment, also known as loosening of associations, refers to disorganized thinking that jumps between ideas that seem entirely unrelated. Compare § akataphasia, § asyndesis, § entgleisen, § flight of ideas, § knight's move thinking, and § logorrhoea.[12] It can be seen in individuals with schizophrenia, as well as those experiencing mania.[1]

### dereistic thinking

Dereistic means: away from reality, undirected fantasy thinking.[15] Carl Jung wrote, "This is the basic activity of psychic life, this fantasy making", and he used the term image not from afterimage, something one has experienced or seen, but says he takes it from poetic usage.[16] Dereistic thinking: An old descriptive term used to refer to thinking not in accordance with the facts of reality and experience and following illogical, idiosyncratic reasoning. This term is also used interchangeably with § autistic thinking though they are not exact synonyms: dereistic emphasizes disconnection from reality and autistic emphasizes preoccupation with inner experience.

### dermatozoenwahn

Alternate term for organic hallucinosis and delusional parasitosis, the continuous belief that one's skin or body has been infested by parasites or insects. This state cannot be diagnosed if the hallucinatory state is produced while the individual is under the influence of drugs or alcohol, or if the individual fulfills the criterion for delirium. In general, if an individual is under the influence of a drug, or experiencing the symptoms of withdrawal from that drug, this condition is not psychiatric but medical, and termed formication.

### dhat

Dhat syndrome refers to a complaint of premature ejaculation or impotence and a false belief that semen is being passed in the urine.

### doppelgänger

Main page: Social:Doppelgänger

The doppelgänger is a phenomenon in which the person feels that their exact "double" is present alongside them all the time and goes with them wherever they go.

## E

### écho de la pensée

In écho de la pensée, meaning "thought echo" in French, thoughts seem to be spoken aloud just after being produced. The individual hears the "echo" of their thoughts in the form of a voice after they have made the thought. See also § gedankenlautwerden and § thought sonorization.

### entgleisen

Literally means jumping off the rails.[dubious - discuss] Alternate term used for derailment of thought (a morbid form of loosening of association or asyndesis). A Schneiderian term by origin. In this form of thought the individual jumps from one topic to another during conversation and both topics have literally no connection with each other. This is in contrast with flight of ideas where connection is present between one topic and another. Compare § akataphasia, § asyndesis, and § derailment.

### extracampine

Extracampine hallucinations are hallucinations beyond the possible sensory field, e.g., an individual "seeing" somebody standing behind them is a visual extracampine hallucination experience.[17][18][19]

## F

### fantasy

Main page: Philosophy:Fantasy (psychology)

Fantasy is imagining that expresses desires and aims.

### fatuous affect

The moods of an individual with fatuous affect resemble the moods of a child. This condition is seen in hebephrenic schizophrenia.

### flight of ideas

"Flight of ideas" describes excessive speech at a rapid rate that involves causal association between ideas. Links between ideas may involve usage of puns or rhymes.[12][20] It is typical of mania, classically seen in bipolar disorder.[12] Compare § derailment.

### folie à deux

Main page: Unsolved:Folie à deux

Also called "induced psychosis", folie à deux is a delusional disorder shared by two or more people who are closely related emotionally. One has real psychosis while the symptoms of psychosis are induced in the other or others due to close attachment to the one with psychosis. Separation usually results in symptomatic improvement in the one who is not psychotic.

Folie communiquée, folie imposée, folie induite, and folie simultanée are the four subtypes of folie à deux.

folie communiquée

Folie communiquée, or subtype C of folie à deux, occurs when a normal person suffers a contagion of their ideas after resisting them for a long time. Once they acquire these beliefs they maintain them despite separation.

folie imposée

Folie imposée, or subtype A of folie a deux, is the most common form in which the dominant person imposes a delusion into a person who was not previously mentally ill. Separation of the two results in improvement of the non-dominant person.

folie induite

In folie induite, or subtype D of folie a deux, a person who is already psychotic adds the delusions of a closely associated person to their own.

folie simultanée

In folie simultanée, or subtype B of folie a deux, a delusional system emerges simultaneously and independently in two closely related persons, and the separation of the two would not be beneficial in the resolution of psychopathology.

### Fregoli delusion

Main page: Medicine:Fregoli delusion

In Fregoli delusion, a person has a delusional belief that various different people are in fact a certain other person, even if there is no physical resemblance.[1]

Fregoli syndrome is considered a form of delusional misidentification "in which the false identification of familiar people occurs in strangers".[21]

## G

### gedankenlautwerden

In Gedankenlautwerden, an individual hears thoughts spoken aloud. Thoughts are heard in the form of a voice at the same time as they are thought, not afterwards. See also § Écho de la pensée and § Thought sonorization

### gegenhalten

Gegenhalten is a catatonic phenomenon in which the subject opposes all passive movements with the same degree of force as applied by the examiner. It is slightly different from § negativism in which the subject does exactly the opposite to what is asked in addition to showing resistance.

## H

### hemiasomatognosia

Hemiasomatognosia is a subtype of anosognosia in which the person suffering from hemiplegia neglects one half of their body.

### hyposchemazia; aschemazia

Hyposchemazia is characterized by the reduced awareness of one's body image and aschemazia by the absence of it. These disorders can have many varied causes such as physical injuries, mental disorders, or mental or physical states. These include transection of the spinal cord, parietal lobe lesions (e.g. right middle cerebral artery thrombosis), anxiety, depersonalization, epileptic auras, migraines, sensory deprivation, and vertigo (i.e. "floating on air").

## I

### idée fixe

Idée fixe is an alternate term for an overvalued idea. In this condition, a belief that might seem reasonable both to the individual and to other people comes to dominate completely the individual's thinking and life.

### ideas of alienation

Thoughts that one's own body part or action is not of one's own.

### ideas of influence

Thoughts that one's own action is caused by someone else's will or some other external cause.

### ideas of reference

Main page: Medicine:Ideas of reference and delusions of reference

Ideas of reference are a delusional belief that general events are personally directed at oneself.[12]

### illusion

An illusion is a false perception of a detectable stimulus.[1]

## J

### jargon aphasia

Jargon aphasia is characterized by incoherent, meaningless speech with neologisms (newly invented words). These are unconscious thoughts that find expression when one is off one's guard and must be consciously repressed.

## K

### Klüver–Bucy syndrome

Main page: Medicine:Klüver–Bucy syndrome

In Klüver–Bucy syndrome, an individual will display placidity, hyperorality, hypersexuality, and hyperphagia. This condition results from bilateral destruction of the amygdaloid bodies of the limbic system.

### knight's move thinking

Knight's move thinking is a complete loosening of associations where there is no logical link between one idea and the next. Based on a knight on a chessboard where the movement can be any L shaped direction, making it difficult to track. Compare § derailment.[22][citation needed]

### koro

Main page: Medicine:Koro

Koro is a culture-specific syndrome, generally seen only among Chinese people. It involves a panicked feeling that one's genitals are retracting into the abdomen, and that this will result in death.[1]

### kuru

Main page: Medicine:Kuru (disease)

Kuru (also known as "laughing sickness" due to the outbursts of laughter that mark its second phase) was first noted in New Guinea in the early 1900s. Kuru is now known to be a prion disease, one of several known transmissible spongiform encephalopathies.

## L

### latah

Latah is a culture-specific syndrome usually seen in Southeast Asia and involves startle-induced disorganization, hypersuggestibility, automatic obedience, and echopraxia (a tendency to mimic examiner's or other person's actions). It is usually associated with women. There is controversy over whether Latah is a real psychiatric condition, or merely a display of exhibitionism that would otherwise not be socially acceptable.

### l'homme qui rit

In l'homme qui rit (from the French, meaning "the man who laughs"), an individual displays inappropriate laughter accompanied by release phenomena of the frontal subdominant lobe.

### Lilliputian hallucinations

Main page: Unsolved:Alice in Wonderland syndrome

Lilliputian hallucinations are characterized by abnormal perception of objects as being shrunken in size but normal in detail. Usually seen in delirium tremens.

### logoclonia

In logoclonia, the individual often repeats the last syllable of a word. Compare echolalia. Often a symptom of Alzheimers or Parkinson's disease.

### logorrhoea

Logorrhoea, also known as "volubility", is characterized by fluent and rambling speech using numerous words. Compare § derailment.

## M

### mania

Main page: Medicine:Mania

Mania is often mirrored as a minor image of depression. Mania is a state abnormally elevated arousal, affected, and energy level. As mania intensifies, irritability can be more pronounced and result in anxiety or violence. Mania symptoms are elevated mood, flights of ideas, pressure of speech, increased energy, decreased need or desire for sleep, and hyperactivity.

### mania a potu

Mania a potu is an alcohol intoxication state with violent and markedly disinhibited behavior. This condition is different from violent behavior in otherwise normal individuals who are intoxicated.

### metonymy

Metonymy is a speech disturbance in which patients, commonly suffering from schizophrenia, use inappropriate words or expressions that are related to the proper ones. Examples include: consume a menu, instead of a meal; lose the piece of string of the conversation, not the thread of the conversation. See also § word approximation.[23][24]

### mitgehen

Mitgehen is an extreme form of mitmachen in which very slight pressure leads to movement in any direction, also called the "anglepoise" effect or "anglepoise lamp sign". This movement occurs despite instructions to resist the pressure, as individuals with this condition often experience even slight pressure as forcible grasping and pushing.

### mitmachen

In mitmachen, one's body can be put into any posture, despite instructions given to resist. Compare § mitgehen.

### moria

Moria is the condition characterized by euphoric behavior, such as frivolity and the inability to act seriously. In addition, there is a lack of foresight and a general indifference. It is found in frontal lobe lesions, often along with § witzelsucht, particularly when the orbital surface is damaged. Recent research has shown its presence in frontotemporal dementia.

## N

### negativism

Resistance to attempts to move the subject, who then does the opposite of what is asked. Negativism is usually a sign of catatonia, and may progress to (catatonic) rigidity. It is slightly different from § gegenhalten, in which the individual resists movement but does not perform the opposite movement. Also see: oppositional defiance disorder (ODD).

### neologism

In a neurological or psychopathological context, neologisms are nonsensical words or phrases whose origins are unrecognizable, and are associated with aphasia or schizophrenia. Incorrectly constructed words whose origins are understandable may also be called neologisms, but are more properly referred as § word approximations.[25][26]

## O

### omega sign

The omega sign is the occurrence of a fold (like the Greek letter omega, Ω ) in the forehead, above the nose, produced by the excessive action of the corrugator muscle. It is sometimes seen in depression.

### oneiroid state

From Greek oneiros as meaning "dream". In an oneiroid state one feels and behaves as though in a dream. Also known as "oneirophrenia" as described by Ladislas J. Meduna.

### oneirophrenia

See § oneiroid state or oneirophrenia.

### overvalued idea

Overvalued ideas are exaggerated beliefs that a person sustains beyond reasons, but are not as unbelievable and are not as persistently held as delusions.[27][28] Preoccupation with spouse's possible infidelity can be an overvalued idea if no evidence exists to arouse suspicion. Body dysmorphic disorder's obsessive preoccupation that some aspect of one's own appearance is severely flawed is another example of an overvalued idea.[27]

## P

### palilalia

Palilalia is characterized by the repetition of a word or phrase; i.e., the subject continues to repeat a word or phrase after once having said. It is a form of § perseveration.

### palinacousis

In palinacousis the subject continues to hear a word, a syllable or any sound, even after the withdrawal of stimulus. It is a type of § perseveration.

### palinopsia

Main page: Medicine:Palinopsia

In palinopsia a visual image persists after the stimulus has gone (similar to an afterimage seen after looking into a bright light).

### parapraxis

A Freudian slip, or parapraxis, is an error in speech, memory or physical action that is believed to be caused by the unconscious mind.

### paraprosopia

A delusion in which a person believes they have seen a face transform into a grotesque form – often described as a 'monster', 'vampire', 'werewolf' or similar. This is very rare and most likely to be described by people suffering from schizophrenia.

### paraschemazia

Paraschemazia is characterized by a distortion of body image. It can be caused by hallucinogenic drugs such as LSD and mescalin, epileptic auras, and sometimes migraines.

### pareidolia

Main page: Physics:Pareidolia

In pareidolia a vague or random stimulus is mistakenly perceived as recognizable. Pareidolia is a type of illusion and hence called "pareidolic illusion".

### perseveration

Main page: Medicine:Perseveration

This term refers to uncontrollable repetition of a particular response, such as a word, phrase, or gesture, despite the absence or cessation of the original stimulus.[29] Usually it is seen in organic disorders of brain, head injury, delirium or dementia, however can be seen in schizophrenia as well.

### pfropfschizophrenie

This refers to schizophrenia in people with mild learning disabilities.[30]

### piblokto

Piblokto, pibloktoq, or Arctic hysteria, is a condition exclusively appearing in Inuit societies living within the Arctic Circle. Appearing most prevalently in winter, it is considered to be a form of a culture-specific disorder.[31]

Symptoms can include intense "hysteria" (including screaming and uncontrolled wild behavior), depression, coprophagia, and insensitivity to extreme cold.[32] This condition is most often seen in Inuit women.[33]

### poverty of ideas

Often associated with schizophrenia, dementia, and severe depression, poverty of ideas is a thought disturbance in which thought spontaneity and productivity are reduced, and are seen in speech that is vague, has many simple or meaningless repetitions, or full of stereotyped phrases.[34]

### pseudologia fantastica

Pseudologia fantastica is a condition in which a person grossly exaggerates their symptoms or even tells a lie about their symptoms in order to get medical attention. Seen in malingering and Munchausen syndrome.

### psychological pillow

Where the individual holds their head a few centimetres above the bed. No explanation is offered for this. It is a symptom of catatonia and can last for many hours.

### psychopathology

Main page: Philosophy:Psychopathology

Psychopathology is a term which refers to either the study of mental illness or mental distress or to the manifestation of behaviours and experiences which may be indicative of mental illness or psychological impairment.

## R

### rabbit syndrome

Rabbit syndrome is characterized by rapid, vertical, rhythmic movements of lips so that it resembles a rabbit chewing.[13] It is a type of extrapyramidal symptom, distinct from tardive dyskinesia as it spares the tongue and involves vertical movements only. [35]

### reduplicative hallucination

In reduplicative hallucinations there is the perception of seeing a double. Particular kinds of reduplicative hallucination include autoscopy, heautoscopy and out-of-body experiences.

### reduplicative paramnesia

Reduplicative paramnesia is a delusional misidentification syndrome in which one's surroundings are believed to exist in more than one physical location.

### reflex hallucination

Reflex hallucinations occur when true sensory input in one sense leads to production of a hallucination in another sense, e.g. seeing a doctor writing (visual) and then feeling him writing across one's stomach (tactile).

### restlessness

Restlessness has two components: akathisia (subjective "inner" restlessness) and psychomotor agitation (an excess of motor activity).

### retardation

Mental retardation is a term used when a person has certain limitations in mental functioning and in skills such as communicating, taking care of themselves, and social skills.

In children these limitations will cause a child to learn and develop more slowly than a typical child. Children with mental retardation may take longer to learn to speak, walk, and take care of their personal needs such as dressing or eating. They are likely to have trouble learning in school. They will learn, but it will take them longer. There may be some things they cannot learn.[36]

### left–right disorientation

Left–right disorientation is one of the four cardinal signs of Gerstmann's syndrome.

## S

### scanning speech

Scanning speech is an ataxic dysarthria in which syllable durations are equalized. It is characteristic of the dysarthria of multiple sclerosis. Together with nystagmus and intention tremor it forms Charcot's triad 1.

### schizophasia

Main page: Medicine:Schizophasia

Schizophasia, commonly referred to as word salad, is confused, and often repetitious, language that is symptomatic of various mental illnesses.[37]

### schnauzkrampf

A schnauzkrampf is a grimace resembling pouting sometimes observed in catatonic individuals.

### sensitiver beziehungswahn

Sensitiver beziehungswahn, is an alternate term for ideas of reference. In this the person thinks as people are talking about them or observing them or a talk is going on about them on television or radio. Seen in social phobia, depression, delusional disorder and in schizophrenia where they are often present up to a delusional extent.

### Stockholm syndrome

Main page: Social:Stockholm syndrome

The Stockholm syndrome is a psychological response sometimes seen in a hostage, in which the hostage exhibits loyalty to the hostage-taker, in spite of the danger (or at least risk) in which the hostage has been placed.[38] Stockholm syndrome is also sometimes discussed in reference to other situations with similar tensions, such as battered person syndrome,[39] child abuse cases, and bride kidnapping.

### synaesthesiae

Also spelled synæsthesia, synaesthesia, or synesthesia—plural synesthesiae, from the Greek 'syn- meaning "union" and aesthesis meaning "sensation", it is a neurological phenomenon in which two or more bodily senses are coupled.

## T

### telegrammatic or telegraphic speech

In telegraphic speech conjunctions and articles are missed out; meaning is retained and few words are used.

### thought blocking

Main page: Medicine:Thought blocking

Thought blocking, also referred to as thought withdrawal, refers to an abrupt stop in the middle of a train of thought; the individual might or might not be unable to continue the idea.[12] This is type of formal thought disorder that can be seen in schizophrenia.[1]

### thought sonorization

A combined term for § Gedankenlautwerden and § Écho de la pensée ("thought echo")

### torpor

Torpor in psychopathology is usually taken to mean profound inactivity not caused by reduction in consciousness.

### Tourette syndrome

Tourette syndrome (abbreviated as TS or Tourette's) is a common neurodevelopmental disorder that begins in childhood or adolescence. It is characterized by multiple movement (motor) tics and at least one vocal (phonic) tic. Common tics are blinking, coughing, throat clearing, sniffing, and facial movements. These are typically preceded by an unwanted urge or sensation in the affected muscles, can sometimes be suppressed temporarily, and characteristically change in location, strength, and frequency. Tourette's is at the more severe end of a spectrum of tic disorders. The tics often go unnoticed by casual observers.

### traumatic bonding

Traumatic bonding occurs as the result of ongoing cycles of abuse in which the intermittent reinforcement of reward and punishment creates powerful emotional bonds that are resistant to change.[40]

### trichotillomania

Also known as "hair pulling disorder", trichotillomania (TTM) is an impulse control disorder characterised by a long term urge that results in the pulling out of one's hair. This occurs to such a degree that hair loss can be seen. Efforts to stop pulling hair typically fail. Hair removal may occur anywhere; however, the head and around the eyes are most common. The hair pulling is to such a degree that it results in distress

## V

### verbigeration

Verbigeration is a verbal stereotypy in which usually one or several sentences or strings of fragmented words are repeated continuously. Sometimes individuals will produce incomprehensible jargon in which stereotypies are embedded. The tone of voice is usually monotonous. This can be produced spontaneously or precipitated by questioning. The term verbigeration was first used in psychiatry by Karl Kahlbaum in 1874, and it referred to a manner of talking which was very fast and incomprehensible. At the time verbigeration was seen as a "disorder of language" and represented a central feature of catatonia. The word is derived from the Latin word verbum (also the source of verbiage), plus the verb gerĕre, to carry on or conduct, from which the Latin verb verbigerāre, to talk or chat, is derived. However, clinically the term verbigeration never achieved popularity and as such has virtually disappeared from psychiatric terminology. Compare Echolalia.[41]

### verstimmung

Refers to an ill-humored mood state often accompanied by low mood and depressive symptoms. The people surrounding the individual often feel upset by this condition.

### vorbeigehen; vorbeireden

In vorbeigehen or vorbeireden, an individual will answer a question in such a way that it is clear the question was understood, though the answer itself is very obviously wrong. For example: "How many legs does a dog have?" – "Six". This condition occurs in Ganser syndrome and has been observed in prisoners awaiting trial. Vorbeigehen (giving approximate answers) was the original term used by Ganser but Vorbeireden (talking past the point) is the term generally in use (Goldin 1955). This behavior is also seen in people trying to feign psychiatric disorders (hence its association with prisoners).[42]

## W

### wahneinfall

Wahneinfall is an alternate term for autochthonous delusions or delusional intuition. This is one of the types of primary delusions in which a firm belief comes into the individual's mind "out of the blue" or as an intuition, hence called "delusional intuition". Other types of primary delusions include delusional mood (or atmosphere), delusional (apophanous) perception and delusional memories. Care is taken not to impugn an otherwise-rational individual's instinctive aversion or inexpressible sense of or belief about a thing by dismissing it as wahneinfall.

### waxy flexibility

Waxy flexibility, also known as § Cerea flexibilitas, is characterized by an individual's movements having the feeling of a plastic resistance, as if the person were made of wax. This occurs in catatonic schizophrenia, and a person suffering from this condition can have their limbs placed in fixed positions as if the person were in fact made from wax.

### waxy rigidity

Compare § mitmachen and § waxy flexibility.

### Windigo psychosis

Main page: Unsolved:Wendigo

Windigo (also Wendigo, Windago, Windiga, Witiko, and numerous other variants) psychosis is a culture-bound disorder which involves an intense craving for human flesh and the fear that one will turn into a cannibal. This was alleged to have occurred among Algonquian Indian cultures.

### witzelsucht

Witzelsucht is a tendency to tell inappropriate jokes and creating excessive facetiousness and inappropriate or pointless humor. It is seen in frontal lobe disorders usually along with § moria. Recent research has shown that it may also be seen in frontotemporal dementia.[43]

### word approximation

Usage of words in an unconventional or inappropriate way (as in § metonymy), or usage of new but understandable words that are conventionally constructed, contrasting with § neologisms, which are new words whose origins cannot be understood.[44][45]

### word-salad

Word salad (derived from the German Wortsalat) is characterized by confused, and often repetitious, language with no apparent meaning or relationship attached to them. It is often symptomatic of various mental illnesses, such as psychoses, including schizophrenia. Compare § derailment.

### würgstimme

Würgstimme refers to speaking in an odd muffled or strangled voice. It is mainly seen in schizophrenia.

## Z

### zoophilia

One of the paraphilias, characterized by marked distress over, or acting on, urges to indulge in sexual activity that involves animals.

## References

1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 1.20 1.21 1.22 Hales E and Yudofsky JA, eds, The American Psychiatric Press Textbook of Psychiatry, Washington, DC: American Psychiatric Publishing, Inc., 2003
2. ↑ "Achromatopsia" (in en). https://ghr.nlm.nih.gov/condition/achromatopsia#definition.
3. ↑ Ziemssen H (1877). Cyclopædia of the Practice of Medicine, Volume 14. 14. pp. 791. https://books.google.com/books?id=jH0xSe-ZEXoC&q=Akataphasia&pg=PA791.
4. ↑ Sifneos PE (1973). "The prevalence of 'alexithymic' characteristics in psychosomatic patients". Psychotherapy and Psychosomatics 22 (2): 255–262. doi:10.1159/000286529. PMID 4770536.
5. ↑ "Definition". Merriam-Webster Definition. http://www.merriam-webster.com/dictionary/amok.
6. ↑ Hiskey, D (7 Feb 2013). "Origin of the Phrase "Run Amok"". http://www.todayifoundout.com/index.php/2013/02/origin-of-the-phrase-run-amok/.
7. ↑ "Appendix I: Outline for Cultural Formulation and Glossary of Culture-Bound Syndromes". Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, Text Revision (DSM-IV-TR). 1. 2000. doi:10.1176/appi.books.9780890423349.7060. ISBN 978-0-89042-334-9. http://www.psychiatryonline.com/content.aspx?aID=14123&searchStr=amok#14123.
8. ↑ 8.0 8.1 Reber, Arthur S. (2009). The Penguin Dictionary of Psychology (4th ed.). London; New York: Penguin Books. ISBN 9780141030241. OCLC 288985213.
9. ↑ Sims, A; O'Brien, K (1979). "Autokabalesis: An account of mentally ill people who jump from buildings". Medicine, Science, and the Law 19 (3): 195–8. doi:10.1177/002580247901900310. PMID 459744.
10. ↑ Bouffée délirante
11. ↑ "Brain Fag Syndrome - a myth or a reality". Afr J Psychiatry (Johannesbg) 12 (2): 135–43. May 2009. doi:10.4314/ajpsy.v12i2.43731. PMID 19582315. https://www.ajol.info/index.php/ajpsy/article/view/43731.
12. ↑ 12.0 12.1 12.2 12.3 12.4 12.5 12.6 Videbeck, S (2008). Psychiatric-Mental Health Nursing, 4th ed.. Philadelphia: Wolters Kluwers Health, Lippincott Williams & Wilkins.
13. ↑ 13.0 13.1 MacDonald A Box O Klemperer F (2000). "Glossary of Descriptive Psychopathology". Martin Dunitz, London. http://www.psychopathology.org.uk.
14. ↑ MacDonald
15. ↑ Hillman & Shamdasani, James & Sonu (2013). Lament of the Dead, Psychology After Jung's Red Book (First ed.). New York London: W. W. Norton & Company. p. 42.
16. ↑ Jung, Carl (1921). Psychological types (CW 6 ed.). p. 743. ISBN 9780691018133. https://books.google.com/books?id=rUZYvgAACAAJ.
17. ↑ Lewis, Stephen; Escalona, Rodrigo; Keith, Samuel. "12 Shizophrenia and Other Psychotic Disorders". in Sadock, Virginia; Sadock, Benjamin; Ruiz, Pedro. Kaplan and Sadock's Comprehensive Textbook of Psychiatry. Wolters Kluwer. 12.2 Phenomenology of Schizophrenia, Psychotic Symtoms, Auditory Hallucinations.
18. ↑ O'Shea, Brian (2010). "1 Assessing, Describing, and Classifying". Textbook of Psychological Medicine (5th ed.). The College of Psychiatry of Ireland. Symptomatology, p. 30. http://www.irishpsychiatry.ie/wp-content/uploads/2017/02/Textbook-of-Psychological-Medicine-5th-Edition.pdf.
19. ↑ Sato, Y.; Berrios, G. E. (26 April 2003). "Extracampine hallucinations" (in en). The Lancet 361 (9367): 1479–1480. doi:10.1016/S0140-6736(03)13128-5. PMID 12727431. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(03)13128-5/fulltext. Retrieved 8 June 2020.
20. ↑ "flight of ideas". http://www.gpnotebook.co.uk/simplepage.cfm?ID=268828679&linkID=21084&cook=yes.
21. ↑ (Symptoms in the Mind 2nd Edition 1995 by Andrew Sims)
22. ↑ "knight's move thinking". http://www.gpnotebook.co.uk/simplepage.cfm?ID=-1737818073.
23. ↑ APA dictionary of psychology (2015), p. 649
24. ↑ Kaplan and Sadock's Concise Textbook of Clinical Psychiatry (2008)
25. ↑ APA dictionary of psychology (2nd ed.). Washington, DC: American Psychological Association. 2015. p. 696. doi:10.1037/14646-000. ISBN 978-1-4338-1944-5.
26. ↑ Sadock, B. J.; Sadock, VA (2008). ""4 Signs and Symptoms in Psychiatry"". Kaplan and Sadock's Concise Textbook of Clinical Psychiatry. Lippincott Williams & Wilkins. GLOSSARY OF SIGNS AND SYMPTOMS, p. 29. ISBN 9780781787468.
27. ↑ 27.0 27.1 Matorin, Anu A; Shah, Asim A; Ruiz, Pedro (2017). "8 Clinical Manifestations of Psychiatric Disorders". in Sadock, Virginia A; Sadock, Benjamin J; Ruiz, Pedro. Kaplan & Sadock's Comprehensive Textbook of Psychiatry (10th ed.). Wolters Kluwer. THINKING DISTURBANCES, Thought Content, Disturbances in Thought Contents.. ISBN 978-1-4511-0047-1.
28. ↑ APA dictionary of psychology (2015), p. 752.
29. ↑ Helm-Estabrooks N (2004). "The problem of perseveration". Semin Speech Lang 25 (4): 289–90. doi:10.1055/s-2004-837241. PMID 15599818. http://www.thieme-connect.com/ejournals/html/ssl/doi/10.1055/s-2004-837241.
30. ↑ Doody, GA; Johnstone, EC; Sanderson, TL; Owens, DG; Muir, WJ (1998). "Pfropfschizophrenie Revisited: Schizophrenia in People with Mild Learning Disability". The British Journal of Psychiatry 173 (2): 145–153. doi:10.1192/bjp.173.2.145. PMID 9850227. http://bjp.rcpsych.org/cgi/content/abstract/173/2/145.
31. ↑ Taylor, S.; Shelor, N.; Abdelnour, M. (1972). "Nutritional ecology: a new perspective.". Lambda Alpha Journal of Man 4 (1): 47–59. https://soar.wichita.edu/handle/10057/1641. Retrieved 2013-04-06.
32. ↑ Lister, Janet (1989). "Two Perspectives on the etiology of pibloktoq". Lambda Alpha Journal of Man 20: 111–129. http://soar.wichita.edu/handle/10057/1813. Retrieved 2013-04-06.
33. ↑ Ruiz, Pedro (2007). "Focusing on culture and ethnicity in America". Paradigm. http://www.sequeltsi.com/files/library/Understanding_Cultural_Identity.pdf.
34. ↑ APA dictionary of psychology (2015), p. 816 "poverty of ideas a thought disturbance, often associated with schizophrenia, dementia, and severe depression, in which there is reduced spontaneity and productivity of thought as evidenced by speech that is vague or full of simple or meaningless repetitions or stereotyped phrases."
35. ↑ Schwartz, Miguel; Hocherman, Shraga (April 2004). "Antipsychotic-Induced Rabbit Syndrome". CNS Drugs (18): 213–220. doi:10.2165/00023210-200418040-00002. PMID 15015902.
36. ↑ "Disability Info: Mental Retardation Fact Sheet (FS8)". Nichcy.org. http://www.nichcy.org/pubs/factshe/fs8txt.htm.
37. ↑ Berrios G.E. (1999). "Falret, Séglas, Morselli and Masselon, and the "Language of the Insane": a conceptual history". Brain and Language 69 (1): 56–75. doi:10.1006/brln.1999.2042. PMID 10452814.
38. ↑ "'Stockholm Syndrome': psychiatric diagnosis or urban myth?". Acta Psychiatr Scand 117 (1): 4–11. November 19, 2007. doi:10.1111/j.1600-0447.2007.01112.x. PMID 18028254.
39. ↑ Dutton D.G, Painter S.L. (1981). "Traumatic bonding: the development of emotional attachments in battered women and other relationships of intermittent abuse". Victimology: An International Journal 1 (4): 139–155.
40. ↑ Chrissie Sanderson. Counselling Survivors of Domestic Abuse. Jessica Kingsley Publishers; 15 June 2008. ISBN:978-1-84642-811-1. p. 84.
41. ↑ Kaufmann, Cornelia; Agalawatta, Neelya; Malhi, Gin S. (2018). "SAGE Journals: Your gateway to world-class journal research" (in en). Australian & New Zealand Journal of Psychiatry 52 (4): 391–393. doi:10.1177/0004867418765669. PMID 29569489.
42. ↑ Vorbeireden & Vorbeigehen
43. ↑ Mendez M.; Lauterbach E.; Sampson S. (2008). "An evidence-based review of the psychopathology of frontotemporal dementia: a report of the ANPA Committee on Research". The Journal of Neuropsychiatry and Clinical Neurosciences 20 (2): 130–149. doi:10.1176/jnp.2008.20.2.130. PMID 18451185.
44. ↑ APA dictionary of psychology (2015), p. 1161 "word approximation a speech disturbance in which conventional words are used in unconventional or inappropriate ways (as in metonymy), or new but understandable words are constructed out of ordinary words (e.g., easify for simplify)."
45. ↑ Kaplan and Sadock's Concise Textbook of Clinical Psychiatry (2008) "word approximation Use of conventional words in an unconventional or inappropriate way (metonymy) or of new words that are developed by conventional rules of word formation (e.g., "handshoes" for gloves and "time measure" for clock); distinguished from a neologism, which is a new word whose derivation cannot be understood. See also paraphasia."

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