Paired Tone Presentation Enhances Responses of Human Auditory Cortex to Rare Frequency Changes
An ‘oddball paradigm’, where monotonously repeated ‘standard’ sounds are randomly replaced by physically different ‘deviants’, has been recently used in several neuromagnetic studies. For example, a rare change in tone frequency evokes a special response, ‘mismatch field’ (MMF), with the source area close to that of the 100-ms response (N100m) to stimulus onset (Hari et al., 1984; Sams et al., 1985). The functional relation between the sources of N100m and MMF is still an unsolved question.
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- Hari, R., Hämäläinen, M., Ilmoniemi, R., Kaukoranta, E., Reinikainen, K., Salminen, J., Alho, K., Näätänen, R., and Sams, M., 1984, Responses of the primary auditory cortex to pitch changes in a sequence of tone pips: neuromagnetic recordings in man, Neurosci. Lett., 50:127.PubMedCrossRefGoogle Scholar