Visual stimulation quenches global alpha range activity in awake primate V4: a case study
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- dc.contributor.author Deneux, Thomas
- dc.contributor.author Masquelier, Timothée
- dc.contributor.author Bermudez, Maria A.
- dc.contributor.author Masson, Guillaume S.
- dc.contributor.author Deco, Gustavo
- dc.contributor.author Vanzetta, Ivo
- dc.date.accessioned 2019-07-04T10:36:24Z
- dc.date.available 2019-07-04T10:36:24Z
- dc.date.issued 2017
- dc.description.abstract Increasing evidence suggests that sensory stimulation not only changes the level of cortical activity with respect to baseline but also its structure. Despite having been reported in a multitude of conditions and preparations (for instance, as a quenching of intertrial variability, Churchland et al., 2010), such changes remain relatively poorly characterized. Here, we used optical imaging of voltage-sensitive dyes to explore, in V4 of an awake macaque, the spatiotemporal characteristics of both visually evoked and spontaneously ongoing neuronal activity and their difference. With respect to the spontaneous case, we detected a reduction in large-scale activity (cortical extent>1 mm) in the alpha range (5 to 12.5 Hz) during sensory inflow accompanied by a decrease in pairwise correlations. Moreover, the spatial patterns of correlation obtained during the different visual stimuli were on the average more similar one to another than they were to that obtained in the absence of stimulation. Finally, these observed changes in activity dynamics approached saturation already at very low stimulus contrasts, unlike the progressive, near-linear increase of the mean raw evoked responses over a wide range of contrast values, which could indicate a specific switching in the presence of a sensory inflow.
- dc.description.sponsorship This work was supported by the European Union (Integrated Project BrainScales), Award No. IST-FET-2010-269921; a French-Hungarian International ANR grant MULTISCALEFUNIM; and recurrent funding by CNRS and Aix-Marseille Université.
- dc.format.mimetype application/pdf
- dc.identifier.citation Deneux T, Masquelier T, Bermudez MA, Masson GS, Deco G, Vanzetta I. Visual stimulation quenches global alpha range activity in awake primate V4: a case study. Neurophotonics. 2017 Jul-Sep;4(3):031222. DOI: 10.1117/1.NPh.4.3.031222
- dc.identifier.doi http://dx.doi.org/10.1117/1.NPh.4.3.031222
- dc.identifier.issn 2329-423X
- dc.identifier.uri http://hdl.handle.net/10230/41941
- dc.language.iso eng
- dc.publisher Society of Photo Optical Instrumentation Engineers (SPIE)
- dc.relation.ispartof Neurophotonics. 2017 Jul-Sep;4(3):031222.
- dc.relation.projectID info:eu-repo/grantAgreement/EC/FP7/269921
- dc.rights © 2017 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. Deneux T, Masquelier T, Bermudez MA, Masson GS, Deco G, Vanzetta I. Visual stimulation quenches global alpha range activity in awake primate V4: a case study. Neurophotonics. 2017 Jul-Sep;4(3):031222. http://dx.doi.org/10.1117/1.NPh.4.3.031222
- dc.rights.accessRights info:eu-repo/semantics/openAccess
- dc.subject.other V4
- dc.subject.other Awake monkey
- dc.subject.other Optical imaging
- dc.subject.other Voltage-sensitive dyes
- dc.subject.other Ongoing activity
- dc.subject.other Correlation
- dc.title Visual stimulation quenches global alpha range activity in awake primate V4: a case study
- dc.type info:eu-repo/semantics/article
- dc.type.version info:eu-repo/semantics/publishedVersion