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The Cognitive Neuroscience of Music$
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Isabelle Peretz and Robert J. Zatorre

Print publication date: 2003

Print ISBN-13: 9780198525202

Published to Oxford Scholarship Online: March 2012

DOI: 10.1093/acprof:oso/9780198525202.001.0001

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Intracerebral Evoked Potentials in Pitch Perception Reveal a Functional Asymmetry of Human Auditory Cortex

Intracerebral Evoked Potentials in Pitch Perception Reveal a Functional Asymmetry of Human Auditory Cortex

Chapter:
(p.152) Chapter 10 Intracerebral Evoked Potentials in Pitch Perception Reveal a Functional Asymmetry of Human Auditory Cortex
Source:
The Cognitive Neuroscience of Music
Author(s):

Catherine LiéGeois-Chauvel

Kimberly Giraud

Jean-Michel Badier

Patrick Marquis

Patrick Chauvel

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780198525202.003.0010

This chapter examines the tonotopic organization of the human auditory cortex using intracerebrally recorded evoked potentials studied as a function of the anatomical recording site. The sensitivity of a neuronal population to a given frequency is determined from fluctuations in auditory evoked potential (AEP) amplitude between different recording sites in the primary auditory cortex and surrounding secondary areas like the planum temporale. The chapter particularly explores the tonotopic organization of the human auditory cortex in both cerebral hemispheres. In the right hemisphere, clear spectrally organized tonotopic maps wre observed with distinct separations between different frequency-processing regions. AEPs for high frequencies were recorded medially, whereas AEPs for low frequencies were recorded laterally. However, in the left hemisphere, this tonotopic organization was less evident, with different regions involved in the processing of a range of frequencies. The hemisphere-related difference in the processing of tonal frequency is discussed in relation to pitch perception.

Keywords:   auditory evoked potential, tonotopic organization, auditory cortex, planum temporale, cerebral hemispheres, pitch perception, functional asymmetry, tonal frequency

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