Increasing the spatial extent of attention strengthens surround suppression

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buir.contributor.authorKınıklıoğlu, Merve
buir.contributor.authorBoyacı, Hüseyin
buir.contributor.orcidBoyacı, Hüseyin|0000-0003-3168-0654
buir.contributor.orcidKınıklıoğlu, Merve|0000-0002-6668-9168
dc.citation.epage12en_US
dc.citation.spage1en_US
dc.citation.volumeNumber199en_US
dc.contributor.authorKınıklıoğlu, Merve
dc.contributor.authorBoyacı, Hüseyin
dc.date.accessioned2023-02-22T06:18:07Z
dc.date.available2023-02-22T06:18:07Z
dc.date.issued2022-10
dc.departmentAysel Sabuncu Brain Research Center (BAM)en_US
dc.departmentDepartment of Psychologyen_US
dc.departmentInterdisciplinary Program in Neuroscience (NEUROSCIENCE)en_US
dc.departmentNational Magnetic Resonance Research Center (UMRAM)en_US
dc.description.abstractHere we investigate how the extent of spatial attention affects center-surround interaction in visual motion processing. To do so, we measured motion direction discrimination thresholds in humans using drifting gratings and two attention conditions. Participants were instructed to limit their attention to the central part of the stimulus under the narrow attention condition, and to both central and surround parts under the wide attention condition. We found stronger surround suppression under the wide attention condition. The magnitude of the attention effect increased with the size of the surround when the stimulus had low contrast, but did not change when it had high contrast. Results also showed that attention had a weaker effect when the center and surround gratings drifted in opposite directions. Next, to establish a link between the behavioral results and the neuronal response characteristics, we performed computer simulations using the divisive normalization model. Our simulations showed that using smaller versus larger multiplicative attentional gain and parameters derived from the medial temporal (MT) area of the cortex, the model can successfully predict the observed behavioral results. These findings reveal the critical role of spatial attention on surround suppression and establish a link between neuronal activity and behavior. Further, these results also suggest that the reduced surround suppression found in certain clinical disorders (e.g., schizophrenia and autism spectrum disorder) may be caused by abnormal attention mechanisms.en_US
dc.description.provenanceSubmitted by Betül Özen (ozen@bilkent.edu.tr) on 2023-02-22T06:18:07Z No. of bitstreams: 1 Increasing_the_spatial_extent_of_attention_strengthens_surround_suppression.pdf: 3213717 bytes, checksum: 21ffeec61d9a6ba2a5a23b9fbb88f447 (MD5)en
dc.description.provenanceMade available in DSpace on 2023-02-22T06:18:07Z (GMT). No. of bitstreams: 1 Increasing_the_spatial_extent_of_attention_strengthens_surround_suppression.pdf: 3213717 bytes, checksum: 21ffeec61d9a6ba2a5a23b9fbb88f447 (MD5) Previous issue date: 2022-10en
dc.identifier.doi10.1016/j.visres.2022.108074en_US
dc.identifier.issn0042-6989
dc.identifier.urihttp://hdl.handle.net/11693/111596
dc.language.isoEnglishen_US
dc.publisherElsevier Ltden_US
dc.relation.isversionofhttps://doi.org/10.1016/j.visres.2022.108074en_US
dc.source.titleVision Researchen_US
dc.subjectAttentionen_US
dc.subjectCenter-surrounden_US
dc.subjectinteractionen_US
dc.subjectMotion perceptionen_US
dc.subjectResponse normalizationen_US
dc.subjectSurround suppressionen_US
dc.titleIncreasing the spatial extent of attention strengthens surround suppressionen_US
dc.typeArticleen_US

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