FMRI adaptation

Functional magnetic resonance imaging adaptation (FMRIa) is a method of functional magnetic resonance imaging that reads the brain changes occurring in response to long exposure to evocative stimulus.^[1] If Stimulus 1 (S₁) excites a certain neuronal population, repeated exposure to S₁ will result in subsequently attenuated responses. This adaptation may be due to neural fatigue or coupled hemodynamic processes. However, when S₁ is followed by a unique stimulus, S₂, the response amplitudes should not be attenuated as a fresh sub-population of neurons is excited. Using this technique can allow researchers to determine if the same or unique neuronal groups are involved in processing two stimuli.^[2]

Usage

This technique has been used successfully in examination of the visual system, particularly orientation, motion, and face recognition.^[2]

See also

• Adaptive system
• Functional magnetic resonance imaging
• Neural adaptation

References

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