Functional organization of the human auditory cortex |
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Authors: | I O Volkov M D Noh C P Garrell M A Howard |
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Institution: | (1) Division of Neurosurgery, University of Iowa Hospitals and Clinics, Iowa, USA;(2) Bogomolets Institute of Physiology, National Academy of Sciences of Ukraine, Kyiv, Ukraine |
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Abstract: | We investigated the functional organization of the human auditory cortex using a novel electrophysiological recording technique
combined with an advanced brain magnetic resonance imaging (MRI) technique. Tonotopic mapping data were obtained during single
unit recording along the Heschl’s gyrus. Most of the units studied (73%) demonstrated sharply tuned excitatory responses.
A tonotopic pattern was observed with the best frequencies systematically increasing as more medial-caudal recording sites
were sampled. Additionally, a new auditory field along the posterior aspect of the superior temporal gyrus has been identified
using a high spatial resolution direct recording technique. Results obtained during electrical stimulation demonstrate functional
connectivity between the primary auditory cortex and the auditory field in the posterior superior temporal gyrus. |
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Keywords: | |
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