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UID:20250806T194446EDT-8375VAVPKE@132.216.98.100
DTSTAMP:20250806T234446Z
DESCRIPTION:Growing evidence supports the hypothesis that perception and be
 havioral responses to relevant sensory input are determined by integrating
  the activities of large heterogeneous (i.e.\, with different response pro
 perties) neural populations in the brain. Understanding such “population c
 oding” has however been complicated by the fact that neural activities are
  not independent of each other (i.e.\, are correlated) and that such corre
 lations are highly plastic (i.e.\, depend on behavioral context). In this 
 talk\, I will present recent results showing how heterogeneities and spati
 ally-dependent correlations affect the ability of sensory neural populatio
 ns to accurately provide information as to object location relative to the
  organism. Specifically\, we used high-density electrode arrays (i.e.\, Ne
 uropixels probes) to record from sensory neural populations in the electro
 sensory system of Apteronotus leptorhynchus. Correlation magnitude varied 
 with location and was highest at the receptive field edges and strongly de
 creased towards the center. Further analysis revealed that such correlatio
 n plasticity increases information about object location by making neural 
 activities less redundant. Moreover\, through mathematical modeling\, I wi
 ll also demonstrate that there is an optimal non-zero level of heterogenei
 ty for which object location information reaches a maximum. Overall\, the 
 many similarities between the electrosensory and mammalian systems (e.g.\,
  visual) make it likely that results obtained here will be applicable else
 where.\n\nThis seminar will take place in-person and online (details in at
 tached poster below)\n
DTSTART:20230512T150000Z
DTEND:20230512T160000Z
LOCATION:Room 1034\, McIntyre Medical Building\, CA\, QC\, Montreal\, H3G 1
 Y6\, 3655 promenade Sir William Osler
SUMMARY:Physiology Seminar: Coding of prey location by heterogenous neural 
 populations with spatially dependent correlations
URL:/physiology/channels/event/physiology-seminar-codi
 ng-prey-location-heterogenous-neural-populations-spatially-dependent-34789
 9
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