FMRIa
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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.{{Cite journal, last=Grill-Spector, first=Kalanit, last2=Malach, first2=Rafael, date=2001, title=fMR-adaptation: a tool for studying the functional properties of human cortical neurons, journal=Acta Psychologica, language=en, volume=107, issue=1–3, pages=293–321, doi=10.1016/S0001-6918(01)00019-1, pmid=11388140 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.Krekelberg, B, Boynton, G.M., & van Wezel, R.J.A. (2006). Adaptation: from single cells to BOLD signals. ''Trends in Neurosciences''.


Usage

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


See also

*
Adaptive system An adaptive system is a set of interacting or interdependent entities, real or abstract, forming an integrated whole that together are able to respond to environmental changes or changes in the interacting parts, in a way analogous to either conti ...
* Functional magnetic resonance imaging *
Neural adaptation Neural adaptation or sensory adaptation is a gradual decrease over time in the responsiveness of the sensory system to a constant stimulus. It is usually experienced as a change in the stimulus. For example, if a hand is rested on a table, the tab ...


References

Magnetic resonance imaging