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DESCRIPTION:Reverse-engineering cognitive and neural representations with m
 ultilevel computational theories\n\nIlker Yildirim\, Yale University\n	Tues
 day April 1\, 12-1pm\n	Zoom Link: https://mcgill.zoom.us/j/89914150820\n	In 
 Person: 550 Sherbrooke\, Room 189\n	\n	Abstract: There lies a great distance
  between the raw inputs sensed at our retinas to what we experience as the
  contents of our percepts and thoughts --- objects with 3D shapes and phys
 ical properties\, predictions of how these objects will move\, and our pla
 ns toward them. What algorithms underlie these “object cognition” abilitie
 s in the brain\, including the formats of neural object representations\, 
 how these representations are inferred across the sensory cortex\, and how
  they are used to predict what will happen next? Across two projects\, I’l
 l provide evidence that the brain implements object cognition by building 
 and manipulating “world models” — structure-preserving\, behaviorally effi
 cacious representations of the physical world. I’ll do so by presenting “m
 ultilevel computational theories”\, which are computational models that na
 tively interoperate in both the cognitive level of structure-preserving ob
 ject representations and the neural level of distributed\, multi-area code
 s and attractor dynamics. Using these models\, the first project reveals a
  multi-area algorithm of the macaque inferotemporal cortex as reversing a 
 graphics-based generative model of how 3D scenes form and project to image
 s. The second project reveals neural mechanisms of mental simulation in ma
 caque prefrontal cortex playing a variant of the game pong\, as variable a
 ttractor dynamics implementing a world model of this game. Together\, thes
 e studies start to reveal how the rich and generalizable knowledge of the 
 world of objects is encoded in the brain’s biological neural networks.\n
DTSTART:20250401T160000Z
DTEND:20250401T170000Z
SUMMARY:QLS Seminar Series - Ilker Yildirim
URL:/centre-montreal/channels/event/qls-seminar-series
 -ilker-yildirim-364293
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