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CATEGORIES:Zangwill Club
SUMMARY:Plastic brains for flexible decisions - Zoe Kourtz
 i (University of Cambridge)
DTSTART;TZID=Europe/London:20221014T163000
DTEND;TZID=Europe/London:20221014T180000
UID:TALK178826AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/178826
DESCRIPTION:Understanding the world around us depends on the b
 rain resolving ambiguous information from our sens
 es to inform our decisions and actions. The brain 
 learns to interpret sensory signals by using past 
 experience to optimize perceptual decisions. But h
 ow does practice mold the adult human brain and re
 sult in improved decisions? We combine ultra high-
 field structural\, functional and neurochemical br
 ain imaging with computational modeling to interro
 gate the fine-scale human brain circuits that supp
 ort learning for perceptual decisions. We provide 
 evidence for interactions between subcortical and 
 cortical circuits that gate sensory plasticity and
  perceptual decision making. We show that thalamoc
 ortical plasticity mediates gain control in visual
  cortex for detecting objects in clutter\, while o
 ccipital-parietal interactions mediate fine featur
 e retuning through recurrent inhibitory processing
  in visual cortex. These findings propose a dynami
 c interplay of adaptive structural and functional 
 plasticity mechanisms for optimized and flexible d
 ecision making in the adult human brain.
LOCATION:Ground Floor Lecture Theatre\, Department of  Psyc
 hology
CONTACT:John Mollon
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