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Nat Neurosci. 2011 Apr;14(4):423-5. doi: 10.1038/nn.2771. Epub 2011 Mar 6.

Orthogonal representation of sound dimensions in the primate midbrain.

Author information

1
Institute of Neuroscience, Faculty of Medical Sciences, Newcastle University, Newcastle upon Tyne, UK. simon.baumann@ncl.ac.uk

Abstract

Natural sounds are characterized by their spectral content and the modulation of energy over time. Using functional magnetic resonance imaging in awake macaques, we observed topographical representations of these spectral and temporal dimensions in a single structure, the inferior colliculus, the principal auditory nucleus in the midbrain. These representations are organized as a map with two approximately perpendicular axes: one representing increasing temporal rate and the other increasing spectral frequency.

PMID:
21378972
PMCID:
PMC3068195
DOI:
10.1038/nn.2771
[Indexed for MEDLINE]
Free PMC Article

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