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Neural Correlates of Vocal Repertoire in Primates

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posted on 2023-07-26, 14:24 authored by Jacob C. Dunn, Jeroen B. Smaers
Understanding the nature of the relationship between vocal complexity and brain architecture across non-human primates may help elucidate some of the key elements underlying the evolution of human speech. Here we report a positive correlation between vocal repertoire size and the relative size of cortical association areas (governing voluntary control over behavioural output) in non-human primates. We further demonstrate that a hominid grade shift in the relative volume of cortical association areas coincides with a similar grade shift in the hypoglossal nucleus (which is associated with the cranial nerve that innervates the muscles of the tongue). Our results support a qualitative continuity in the neural correlates of vocal repertoire, but a quantitative discontinuity in the extent to which the neural system supporting speech is innervated by cortical association areas in great apes and humans.

History

Refereed

  • Yes

Volume

12

Issue number

534

Publication title

Frontiers in Neuroscience

ISSN

1662-453X

Publisher

Frontiers Media

File version

  • Published version

Language

  • eng

Legacy posted date

2018-07-23

Legacy creation date

2018-07-23

Legacy Faculty/School/Department

ARCHIVED Faculty of Science & Technology (until September 2018)

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