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RDATE:20291104T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20300310T030000 RDATE:20301103T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20310309T030000 RDATE:20311102T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20320314T030000 RDATE:20321107T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20330313T030000 RDATE:20331106T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20340312T030000 RDATE:20341105T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20350311T030000 RDATE:20351104T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20360309T030000 RDATE:20361102T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT BEGIN:DAYLIGHT DTSTART:20370308T030000 RDATE:20371101T010000 TZOFFSETFROM:-0500 TZOFFSETTO:-0400 TZNAME:America/New_York EDT END:DAYLIGHT END:VTIMEZONE BEGIN:VEVENT UID:904da384d1e5eda30b60f371fdf9c666 CATEGORIES:RuCCS Colloquia:Spring 2010 CREATED:20151203T141542 SUMMARY:Impact of Attention and Intention on Visual Representations LOCATION:Carnegie Mellon University\, Neuroscience and Center For the Neural Basis o f Cognition DESCRIPTION:Visual perception is produced by the interaction of incoming sensory signal s and top down cognitive and motor signals. When a visual stimulus require s attention, the amplitude of response in parietal neurons in strengthened. This enhancement occurs regardless of the kind of response the monkey wil l make. In contrast to attention, intention can shift the spatial location to which a neuron is sensitive. Spatial integration of visual information across saccades is achieved both by shifting the location of the receptive field and by updating stored memory traces. This "remapping" is initiated by a corollary discharge of the eye movement command, which provides infor mation about the intention to make a saccade.\n\nRemapping is accomplished not by a single brain area but by the participation of parietal, frontal an d extrastriate cortex as well as subcortical structures. This neural circu itry is distinguished by significant redundancy and plasticity, suggesting that the updating of salient stimuli is fundamental for spatial stability a nd visuospatial behavior. These findings provide new evidence that a unifi ed and stable representation of visual space is constructed by a redundant circuit, comprised of cortical as well as subcortical pathways, with a rema rkable capacity for reorganization.\n Background Reading:Attention and Ac tive Vision.R Berman and C ColbyVision Research 49: 1233-48, 2009 http://w ww.cnbc.cmu.edu/faculty/colby-carol/view-details X-ALT-DESC;FMTTYPE=text/html:
Visual perception is produced by the interaction of incoming sensory sig
nals and top down cognitive and motor signals. When a visual stimulus
requires attention, the amplitude of response in parietal neurons in stren
gthened. This enhancement occurs regardless of the kind of respo
nse the monkey will make. In contrast to attention, intention can shi
ft the spatial location to which a neuron is sensitive. Spatial integ
ration of visual information across saccades is achieved both by shifting t
he location of the receptive field and by updating stored memory traces. Th
is "remapping" is initiated by a corollary discharge of the eye movem
ent command, which provides information about the intention to make a sacca
de.
Remapping is accomplished not by a single brain area but by t he participation of parietal, frontal and extrastriate cortex as well as su bcortical structures. This neural circuitry is distinguished by signi ficant redundancy and plasticity, suggesting that the updating of salient s timuli is fundamental for spatial stability and visuospatial behavior.  ; These findings provide new evidence that a unified and stable representat ion of visual space is constructed by a redundant circuit, comprised of cor tical as well as subcortical pathways, with a remarkable capacity for reorg anization.