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Merging functional and structural properties of the monkey auditory cortex

Lookup NU author(s): Dr Olivier Joly, Dr Simon Baumann, Dr Fabien Balezeau, Professor Alexander Thiele, Professor Tim Griffiths

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


Abstract

Recent neuroimaging studies in primates aim to define the functional properties of auditory cortical areas, especially areas beyond Al, in order to further our understanding of the auditory cortical organization. Precise mapping of functional magnetic resonance imaging (fMRI) results and interpretation of their localizations among all the small auditory subfields remains challenging. To facilitate this mapping, we combined here information from cortical folding, micro-anatomy, surface-based atlas and tonotopic mapping. We used for the first time, phase-encoded fMRI design for mapping the monkey tonotopic organization. From posterior to anterior, we found a high-low-high progression of frequency preference on the superior temporal plane. We show a faithful representation of the fMRI results on a locally flattened surface of the superior temporal plane. In a tentative scheme to delineate core versus belt regions which share similar tonotopic organizations we used the ratio of T1-weighted and T2-weighted MR images as a measure of cortical myelination. Our results, presented along a co-registered surface-based atlas, can be interpreted in terms of a current model of the monkey auditory cortex.


Publication metadata

Author(s): Joly O, Baumann S, Balezeau F, Thiele A, Griffiths TD

Publication type: Article

Publication status: Published

Journal: Frontiers in Neuroscience

Year: 2014

Volume: 8

Online publication date: 21/07/2014

Acceptance date: 25/06/2014

Date deposited: 17/09/2015

ISSN (print): 1662-4548

ISSN (electronic): 1662-453X

Publisher: Frontiers Research Foundation

URL: http://dx.doi.org/10.3389/fnins.2014.00198

DOI: 10.3389/fnins.2014.00198


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