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Brain Res. 1996 Jun 17;724(2):260-4.

A chronic microelectrode investigation of the tonotopic organization of human auditory cortex.

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Division of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA.


We investigated the functional organization of human auditory cortex using a new chronic microelectrode technique. Tonotopic mapping data was obtained at the single unit level for the first time in humans. All sound-driven units were noted to have frequency-dependent response patterns. The majority of units (73%) demonstrated sharply tuned excitatory best-frequency responses. Twenty seven percent of units showed wide receptive fields, representing excitatory responses to almost the entire range of frequencies presented. A tonotopic pattern was observed with best frequencies systematically increasing as more medial-caudal recording sites were sampled.

[Indexed for MEDLINE]

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