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Strategic deployment of feature-based attentional gain in primate visual cortex

dc.contributor.authorKozyrev, Vladislav
dc.contributor.authorDaliri, Mohammad Reza
dc.contributor.authorSchwedhelm, Philipp
dc.contributor.authorTreue, Stefan
dc.date.accessioned2019-10-01T11:07:15Z
dc.date.available2019-10-01T11:07:15Z
dc.date.issued2019de
dc.identifier.ISBN31386656
dc.relation.ISSN1545-7885de
dc.identifier.urihttp://resolver.sub.uni-goettingen.de/purl?gs-1/16462
dc.description.abstractAttending to visual stimuli enhances the gain of those neurons in primate visual cortex that preferentially respond to the matching locations and features (on-target gain). Although this is well suited to enhance the neuronal representation of attended stimuli, it is nonoptimal under difficult discrimination conditions, as in the presence of similar distractors. In such cases, directing attention to neighboring neuronal populations (off-target gain) has been shown to be the most efficient strategy, but although such a strategic deployment of attention has been shown behaviorally, its underlying neural mechanisms are unknown. Here, we investigated how attention affects the population responses of neurons in the middle temporal (MT) visual area of rhesus monkeys to bidirectional movement inside the neurons' receptive field (RF). The monkeys were trained to focus their attention onto the fixation spot or to detect a direction or speed change in one of the motion directions (the "target"), ignoring the distractor motion. Population activity profiles were determined by systematically varying the patterns' directions while maintaining a constant angle between them. As expected, the response profiles show a peak for each of the 2 motion directions. Switching spatial attention from the fixation spot into the RF enhanced the peak representing the attended stimulus and suppressed the distractor representation. Importantly, the population data show a direction-dependent attentional modulation that does not peak at the target feature but rather along the slopes of the activity profile representing the target direction. Our results show that attentional gains are strategically deployed to optimize the discriminability of target stimuli, in line with an optimal gain mechanism proposed by Navalpakkam and Itti.de
dc.language.isoengde
dc.rightsopenAccess
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectNeurons; Neuronal tuning; Monkeys; Attention; Curve fitting; Single neuron function; Vision; Primatesde
dc.subject.ddc006
dc.subject.ddc573
dc.subject.ddc612
dc.titleStrategic deployment of feature-based attentional gain in primate visual cortexde
dc.typejournalArticlede
dc.identifier.doi10.1371/journal.pbio.3000387
dc.identifier.doi10.1371/journal.pbio.3000387.g001
dc.identifier.doi10.1371/journal.pbio.3000387.g002
dc.identifier.doi10.1371/journal.pbio.3000387.g003
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dc.identifier.doi10.1371/journal.pbio.3000387.s021
dc.type.versionpublishedVersionde
dc.relation.eISSN1545-7885
dc.bibliographicCitation.volume17de
dc.bibliographicCitation.issue8de
dc.type.subtypejournalArticle
dc.bibliographicCitation.articlenumbere3000387de
dc.description.statuspeerReviewedde
dc.bibliographicCitation.journalPLOS Biologyde


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