Mirror-symmetric tonotopic maps in human primary auditory cortex

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Understanding the functional organization of the human primary auditory cortex (PAC) is an essential step in elucidating the neural mechanisms underlying the perception of sound, including speech and music. Based on invasive research in animals, it is believed that neurons in human PAC that respond selectively with respect to the spectral content of a sound form one or more maps in which neighboring patches on the cortical surface respond to similar frequencies (tonotopic maps). The number and the cortical layout of such tonotopic maps in the human brain, however, remain unknown. Here we use silent, event-related functional magnetic resonance imaging at 7 Tesla and a cortex-based analysis of functional data to delineate with high spatial resolution the detailed topography of two tonotopic maps in two adjacent subdivisions of PAC. These maps share a low-frequency border, are mirror symmetric, and clearly resemble those of presumably homologous fields in the macaque monkey.
Publisher
CELL PRESS
Issue Date
2003-11
Language
English
Article Type
Article
Keywords

LEVEL-DEPENDENT REPRESENTATION; MIDDLE LATENCY COMPONENTS; TIME-RESOLVED FMRI; EVENT-RELATED FMRI; VOLUME MEASUREMENT; INTRINSIC SIGNALS; EVOKED-POTENTIALS; MACAQUE MONKEY; TONE INTENSITY; HUMAN BRAIN

Citation

NEURON, v.40, no.4, pp.859 - 869

ISSN
0896-6273
DOI
10.1016/S0896-6273(03)00669-X
URI
http://hdl.handle.net/10203/81119
Appears in Collection
EE-Journal Papers(저널논문)
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