Journal article
The Topography of Frequency and Time Representation in Primate Auditory Cortices
eLife, Vol.4(4), e03256
01/15/2015
DOI: 10.7554/eLife.03256
PMCID: PMC4398946
PMID: 25590651
Abstract
Natural sounds can be characterised by their spectral content and temporal modulation, but how the brain is organized to analyse these two critical sound dimensions remains uncertain. Using functional magnetic resonance imaging, we demonstrate a topographical representation of amplitude modulation rate in the auditory cortex of awake macaques. The representation of this temporal dimension is organized in approximately concentric bands of equal rates across the superior temporal plane in both hemispheres, progressing from high rates in the posterior core to low rates in the anterior core and lateral belt cortex. In A1 the resulting gradient of modulation rate runs approximately perpendicular to the axis of the tonotopic gradient, suggesting an orthogonal organisation of spectral and temporal sound dimensions. In auditory belt areas this relationship is more complex. The data suggest a continuous representation of modulation rate across several physiological areas, in contradistinction to a separate representation of frequency within each area.
Details
- Title: Subtitle
- The Topography of Frequency and Time Representation in Primate Auditory Cortices
- Creators
- Simon Baumann - University of Newcastle AustraliaOlivier Joly - Newcastle UniversityAdrian Rees - Newcastle UniversityChristopher I. Petkov - Newcastle UniversityLi Sun - Newcastle UniversityAlexander Thiele - Newcastle UniversityTimothy D. Griffiths - Newcastle University
- Resource Type
- Journal article
- Publication Details
- eLife, Vol.4(4), e03256
- DOI
- 10.7554/eLife.03256
- PMID
- 25590651
- PMCID
- PMC4398946
- NLM abbreviation
- Elife
- ISSN
- 2050-084X
- eISSN
- 2050-084X
- Publisher
- Elife Sciences Publications Ltd
- Number of pages
- 31
- Grant note
- 102961; 102961/Z/13/Z; WT 085002MA; 091681 / Wellcome Trust; European Commission NC/K000608/1 / National Centre for the Replacement, Refinement and Reduction of Animals in Research; UK Research & Innovation (UKRI); National Centre for the Replacement, Refinement & Reduction of Animals in Research (NC3Rs)
- Language
- English
- Date published
- 01/15/2015
- Academic Unit
- Psychological and Brain Sciences; Iowa Neuroscience Institute; Neurosurgery; Otolaryngology
- Record Identifier
- 9984360131802771
Metrics
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