{"id":686,"date":"2018-10-26T13:03:13","date_gmt":"2018-10-26T17:03:13","guid":{"rendered":"https:\/\/www.bu.edu\/bravi\/?page_id=686"},"modified":"2018-10-26T13:03:31","modified_gmt":"2018-10-26T17:03:31","slug":"cortical-specialization-for-processing-first-and-second-order-motion","status":"publish","type":"page","link":"https:\/\/www.bu.edu\/bravi\/cortical-specialization-for-processing-first-and-second-order-motion\/","title":{"rendered":"Cortical specialization for processing first- and second-order motion"},"content":{"rendered":"<h2>Serge Dumoulin<\/h2>\n<h3>McGill Vision Research Unit,<br \/>\nDepartment of Ophthalmology, McGill University,<br \/>\nMontr\u00e9al, Canada<\/h3>\n<p><b>Abstract:<\/b><br \/>\nDistinct mechanisms underlying the visual perception of luminance- (first-order) and contrast-defined (second-order) motion have been proposed from electrophysiological, human psychophysical and neurological studies; however a cortical specialization for these mechanisms has proven elusive. Here human brain imaging (fMRI) combined with psychophysical methods was used to assess cortical specializations for processing these two kinds of motion. A common stimulus construction was employed, controlling for differences in spatial and temporal properties, psychophysical performance and attention. Distinct cortical regions have been found preferentially processing either first- or second-order motion, both in occipital and parietal lobes, producing the first physiological evidence in humans to support evidence from psychophysical studies, brain-lesion sites and computational models. These results provide evidence for the idea that first-order motion is computed in V1 and second-order motion in later occipital visual areas, and additionally suggest a functional dissociation between these two kinds of motion beyond the occipital lobe.<\/p>\n<hr \/>\n<h4>The lecture will take place:<\/h4>\n<p>In Room 203, 44 Cummington St.<br \/>\non Tuesday, May 13, 2003 at 12:00 pm<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Serge Dumoulin McGill Vision Research Unit, Department of Ophthalmology, McGill University, Montr\u00e9al, Canada Abstract: Distinct mechanisms underlying the visual perception of luminance- (first-order) and contrast-defined (second-order) motion have been proposed from electrophysiological, human psychophysical and neurological studies; however a cortical specialization for these mechanisms has proven elusive. Here human brain imaging (fMRI) combined with psychophysical [&hellip;]<\/p>\n","protected":false},"author":15420,"featured_media":0,"parent":0,"menu_order":152,"comment_status":"closed","ping_status":"closed","template":"page-templates\/no-sidebars.php","meta":[],"_links":{"self":[{"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/pages\/686"}],"collection":[{"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/users\/15420"}],"replies":[{"embeddable":true,"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/comments?post=686"}],"version-history":[{"count":2,"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/pages\/686\/revisions"}],"predecessor-version":[{"id":688,"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/pages\/686\/revisions\/688"}],"wp:attachment":[{"href":"https:\/\/www.bu.edu\/bravi\/wp-json\/wp\/v2\/media?parent=686"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}