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Processing of Egomotion-Consistent Optic Flow in the Rhesus Macaque Cortex

Lookup NU author(s): Dr Samy Rima

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


Abstract

The cortical network that processes visual cues to self-motion was characterized with functional magnetic resonance imaging in 3 awake behaving macaques. The experimental protocol was similar to previous human studies in which the responses to a single large optic flow patch were contrasted with responses to an array of 9 similar flow patches. This distinguishes cortical regions where neurons respond to flow in their receptive fields regardless of surrounding motion from those that are sensitive to whether the overall image arises from self-motion. In all 3 animals, significant selectivity for egomotion-consistent flow was found in several areas previously associated with optic flow processing, and notably dorsal middle superior temporal area, ventral intra-parietal area, and VPS. It was also seen in areas 7a (Opt), STPm, FEFsem, FEFsacand in a region of the cingulate sulcus that may be homologous with human area CSv. Selectivity for egomotion-compatible flow was never total but was particularly strong in VPS and putative macaque CSv. Direct comparison of results with the equivalent human studies reveals several commonalities but also some differences.Key


Publication metadata

Author(s): Cottereau BR, Smith AT, Rima S, Fize D, Héjja-brichard Y, Renaud L, Lejards C, Vayssière N, Trotter Y, Durand JB

Publication type: Article

Publication status: Published

Journal: Cerebral Cortex

Year: 2017

Volume: 27

Issue: 1

Pages: 330–343

Print publication date: 01/01/2017

Online publication date: 20/01/2017

Acceptance date: 20/01/2017

Date deposited: 24/04/2018

ISSN (print): 1047-3211

ISSN (electronic): 1460-2199

Publisher: Oxford University Press

URL: https://doi.org/10.1093/cercor/bhw412

DOI: 10.1093/cercor/bhw412

PubMed id: 28108489


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