Top-down beta oscillatory signaling conveys behavioral context in early visual cortex

Abstract Top-down modulation of sensory processing is a critical neural mechanism subserving numerous important cognitive roles, one of which may be to inform lower-order sensory systems of the current ‘task at hand’ by conveying behavioral context to these systems. Accumulating evidence indicates t...

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Autores principales:	Craig G. Richter, Richard Coppola, Steven L. Bressler
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/8e4e32285e7f45d2b983eda86870be7c
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spelling	oai:doaj.org-article:8e4e32285e7f45d2b983eda86870be7c2021-12-02T11:40:26ZTop-down beta oscillatory signaling conveys behavioral context in early visual cortex10.1038/s41598-018-25267-12045-2322https://doaj.org/article/8e4e32285e7f45d2b983eda86870be7c2018-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-25267-1https://doaj.org/toc/2045-2322Abstract Top-down modulation of sensory processing is a critical neural mechanism subserving numerous important cognitive roles, one of which may be to inform lower-order sensory systems of the current ‘task at hand’ by conveying behavioral context to these systems. Accumulating evidence indicates that top-down cortical influences are carried by directed interareal synchronization of oscillatory neuronal populations, with recent results pointing to beta-frequency oscillations as particularly important for top-down processing. However, it remains to be determined if top-down beta-frequency oscillations indeed convey behavioral context. We measured spectral Granger Causality (sGC) using local field potentials recorded from microelectrodes chronically implanted in visual areas V1/V2, V4, and TEO of two rhesus macaque monkeys, and applied multivariate pattern analysis to the spatial patterns of top-down sGC. We decoded behavioral context by discriminating patterns of top-down (V4/TEO-to-V1/V2) beta-peak sGC for two different task rules governing correct responses to identical visual stimuli. The results indicate that top-down directed influences are carried to visual cortex by beta oscillations, and differentiate task demands even before visual stimulus processing. They suggest that top-down beta-frequency oscillatory processes coordinate processing of sensory information by conveying global knowledge states to early levels of the sensory cortical hierarchy independently of bottom-up stimulus-driven processing.Craig G. RichterRichard CoppolaSteven L. BresslerNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Craig G. Richter Richard Coppola Steven L. Bressler Top-down beta oscillatory signaling conveys behavioral context in early visual cortex
description	Abstract Top-down modulation of sensory processing is a critical neural mechanism subserving numerous important cognitive roles, one of which may be to inform lower-order sensory systems of the current ‘task at hand’ by conveying behavioral context to these systems. Accumulating evidence indicates that top-down cortical influences are carried by directed interareal synchronization of oscillatory neuronal populations, with recent results pointing to beta-frequency oscillations as particularly important for top-down processing. However, it remains to be determined if top-down beta-frequency oscillations indeed convey behavioral context. We measured spectral Granger Causality (sGC) using local field potentials recorded from microelectrodes chronically implanted in visual areas V1/V2, V4, and TEO of two rhesus macaque monkeys, and applied multivariate pattern analysis to the spatial patterns of top-down sGC. We decoded behavioral context by discriminating patterns of top-down (V4/TEO-to-V1/V2) beta-peak sGC for two different task rules governing correct responses to identical visual stimuli. The results indicate that top-down directed influences are carried to visual cortex by beta oscillations, and differentiate task demands even before visual stimulus processing. They suggest that top-down beta-frequency oscillatory processes coordinate processing of sensory information by conveying global knowledge states to early levels of the sensory cortical hierarchy independently of bottom-up stimulus-driven processing.
format	article
author	Craig G. Richter Richard Coppola Steven L. Bressler
author_facet	Craig G. Richter Richard Coppola Steven L. Bressler
author_sort	Craig G. Richter
title	Top-down beta oscillatory signaling conveys behavioral context in early visual cortex
title_short	Top-down beta oscillatory signaling conveys behavioral context in early visual cortex
title_full	Top-down beta oscillatory signaling conveys behavioral context in early visual cortex
title_fullStr	Top-down beta oscillatory signaling conveys behavioral context in early visual cortex
title_full_unstemmed	Top-down beta oscillatory signaling conveys behavioral context in early visual cortex
title_sort	top-down beta oscillatory signaling conveys behavioral context in early visual cortex
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/8e4e32285e7f45d2b983eda86870be7c
work_keys_str_mv	AT craiggrichter topdownbetaoscillatorysignalingconveysbehavioralcontextinearlyvisualcortex AT richardcoppola topdownbetaoscillatorysignalingconveysbehavioralcontextinearlyvisualcortex AT stevenlbressler topdownbetaoscillatorysignalingconveysbehavioralcontextinearlyvisualcortex
_version_	1718395594705207296

Top-down beta oscillatory signaling conveys behavioral context in early visual cortex

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