Abstract
Mismatch negativity (MMN) is an automatic event-related brain potential (ERP) that reflects a change in auditory stimulation and provides a unique measure of central sound representation. The electrically registered MMN and its magnetic equivalent MMNm are elicited by a discriminable change in any repetitive aspect of auditory stimuli even in the absence of attention (Naatanen et al., 1978; Naatanen, 1992). Moreover, the brain mechanisms generating the MMN response initiate an attention switch to sound change, and thus cause its conscious perception. Hence, MMN can be used to probe the emergence and accuracy of the cortical representations for present and past sound events. Furthermore, the MMN can be used as a means to assess deficits in central auditory processing for various clinical conditions.
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