Memory-related processing of complex sound patterns in human auditory cortex: a MEG study.

Abstract

Responses of the human brain to a complex sound pattern were recorded with a 24 channel magnetometer. The sound pattern consisted of 9 successive 50 ms segments, each with a different frequency. An infrequent change in the frequency of one of the segments elicited a magnetic mismatch response (MMNm) which peaked at about 200 ms after the deviant segment onset and resembled the electrical mismatch negativity (MMN). The equivalent current dipole which best explained the MMNm was located in the supratemporal auditory cortex, suggesting that a memory trace for the sound pattern was stored in that region.

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@article{Alho1993MemoryrelatedPO, title={Memory-related processing of complex sound patterns in human auditory cortex: a MEG study.}, author={K. Alho and Minna Huotilainen and Hannu Tiitinen and Risto J. Ilmoniemi and Jarno Knuutila and Risto N{\"a}{\"a}t{\"a}nen}, journal={Neuroreport}, year={1993}, volume={4 4}, pages={391-4} }