Frequency change detection in human auditory cortex.

摘要: We offer a model of how human cortex detects changes in the auditory environment. Auditory change detection has recently been object intense investigation via mismatch negativity (MMN). MMN is preattentive response to sudden stimulation, measured noninvasively electroencephalogram (EEG) and magnetoencephalogram (MEG). It elicited oddball paradigm, where infrequent deviant tones intersperse series repetitive standard tones. However, little apart from participation tonotopically organized known about neural mechanisms underlying MMN. In present study, we investigate poststimulus inhibition might account for compare effects adaptation with those lateral describing cortex. To test predictions our model, performed MEG EEG measurements on subjects used both small- ( 5 octaves) frequency differences between The experimental results bear out prediction that due inhibition. Finally, suggest serve as probe what stimulus features are mapped by