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The distribution and nature of responses to broadband sounds associated with pitch in the macaque auditory cortex

Lookup NU author(s): Dr Yuki Kikuchi, Dr Sukhbinder Kumar, Dr Simon Baumann, Tobias Overath, Dr Will Sedley, Professor Christopher Petkov, Professor Tim GriffithsORCiD

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Abstract

© 2019The organisation of pitch-perception mechanisms in the primate cortex is controversial, in that divergent results have been obtained, ranging from a single circumscribed ‘pitch centre’ to systems widely distributed across auditory cortex. Possible reasons for such discrepancies include different species, recording techniques, pitch stimuli, sampling of auditory fields, and the neural metrics recorded. In the present study, we sought to bridge some of these divisions by examining activity related to pitch in both neurons and neuronal ensembles within the auditory cortex of the rhesus macaque, a primate species with similar pitch perception and auditory cortical organisation to humans. We demonstrate similar responses, in primary and non-primary auditory cortex, to two different types of broadband pitch above the macaque lower limit in both neurons and local field potential (LFP) gamma oscillations. The majority of broadband pitch responses in neurons and LFP sites did not show equivalent tuning for sine tones.

Publication metadata

Author(s): Kikuchi Y, Kumar S, Baumann S, Overath T, Gander PE, Sedley W, Patterson RD, Petkov CI, Griffiths TD

Publication type: Article

Publication status: Published

Journal: Cortex

Year: 2019

Volume: 120

Pages: 340-352

Online publication date: 18/07/2019

Acceptance date: 10/07/2019

ISSN (print): 0010-9452

ISSN (electronic): 1973-8102

Publisher: Elseiver

URL: https://doi.org/10.1016/j.cortex.2019.07.005

DOI: 10.1016/j.cortex.2019.07.005

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