Delusion[r]: A belief with no basis in reality, or shared with a person's culture, that persists despite evidence to the contrary. [e]
Hallucination[r]: Perception of objects, sounds, or sensations having no demonstrable reality, usually arising from a disorder of the nervous system or in response to certain drugs. [e]
Autism[r]: Developmental disability that results from a disorder of the human central nervous system. [e]
Bipolar disorder[r]: A mental illness of the subtype mood disorders which is also known as manic-depressive illness, characterised by the occurrence of manic or hypomanic states alternating with bouts of depression. [e]
Dementia[r]: Progressive decline in two or more cognitive domains that is severe enough to interfere with the performance of everyday activities. [e]
Depression[r]: Please do not use this term in your topic list, because there is no single article for it. Please substitute a more precise term. See Depression (disambiguation) for a list of available, more precise, topics. Please add a new usage if needed.