{"id":1154,"date":"2019-12-11T09:51:25","date_gmt":"2019-12-11T14:51:25","guid":{"rendered":"https:\/\/sites.bu.edu\/vision\/?p=1154"},"modified":"2020-02-25T10:30:20","modified_gmt":"2020-02-25T15:30:20","slug":"1154","status":"publish","type":"post","link":"https:\/\/sites.bu.edu\/vision\/2019\/12\/11\/1154\/","title":{"rendered":"Normalization governs attentional modulation within human visual cortex"},"content":{"rendered":"<h4 style=\"text-align: justify;\"><em>Nature Communications (2019)<\/em><br \/>\nIlona Bloem &amp; Sam Ling<\/h4>\n<div class=\"page\" title=\"Page 2\">\n<div class=\"layoutArea\">\n<div class=\"column\">\n<p style=\"text-align: justify;\"><img loading=\"lazy\" src=\"\/vision\/files\/2019\/12\/Screen-Shot-2019-12-11-at-9.42.15-AM.png\" alt=\"\" width=\"282\" height=\"281\" class=\"wp-image-1151 alignleft\" srcset=\"https:\/\/sites.bu.edu\/vision\/files\/2019\/12\/Screen-Shot-2019-12-11-at-9.42.15-AM.png 918w, https:\/\/sites.bu.edu\/vision\/files\/2019\/12\/Screen-Shot-2019-12-11-at-9.42.15-AM-150x150.png 150w, https:\/\/sites.bu.edu\/vision\/files\/2019\/12\/Screen-Shot-2019-12-11-at-9.42.15-AM-636x636.png 636w, https:\/\/sites.bu.edu\/vision\/files\/2019\/12\/Screen-Shot-2019-12-11-at-9.42.15-AM-768x766.png 768w, https:\/\/sites.bu.edu\/vision\/files\/2019\/12\/Screen-Shot-2019-12-11-at-9.42.15-AM-100x100.png 100w\" sizes=\"(max-width: 282px) 100vw, 282px\" \/>Although attention is known to increase the gain of visuocortical responses, its underlying neural computations remain unclear. Here, we use fMRI to test the hypothesis that a neural population\u2019s ability to be modulated by attention is dependent on divisive normalization. To do so, we leverage the feature-tuned properties of normalization and find that visuocortical responses to stimuli sharing features normalize each other more strongly. Comparing these normalization measures to measures of attentional modulation, we demonstrate that sub- populations which exhibit stronger normalization also exhibit larger attentional benefits. In a converging experiment, we reveal that attentional benefits are greatest when a subpopulation is forced into a state of stronger normalization. Taken together, these results suggest that the degree to which a subpopulation exhibits normalization plays a role in dictating its potential for attentional benefits.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<p style=\"text-align: justify;\"><a id=\"s1\"><\/a><a id=\"117712208\"><\/a><a href=\"\/vision\/files\/2019\/12\/BloemLing_2019.pdf\" target=\"_blank\" rel=\"noopener\">\u00a0Download it here\u00a0<\/a><\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nature Communications (2019) Ilona Bloem &amp; Sam Ling Although attention is known to increase the gain of visuocortical responses, its underlying neural computations remain unclear. Here, we use fMRI to test the hypothesis that a neural population\u2019s ability to be modulated by attention is dependent on divisive normalization. To do so, we leverage the feature-tuned [&hellip;]<\/p>\n","protected":false},"author":8254,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/posts\/1154"}],"collection":[{"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/users\/8254"}],"replies":[{"embeddable":true,"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/comments?post=1154"}],"version-history":[{"count":3,"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/posts\/1154\/revisions"}],"predecessor-version":[{"id":1158,"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/posts\/1154\/revisions\/1158"}],"wp:attachment":[{"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/media?parent=1154"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/categories?post=1154"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/sites.bu.edu\/vision\/wp-json\/wp\/v2\/tags?post=1154"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}