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Visual Mechanisms Flexible Behavior

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SeminarPast EventNeuroscience

Visual mechanisms for flexible behavior

Marlene Cohen

Prof.

University of Chicago

Schedule
Thursday, January 25, 2024

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Thursday, January 25, 2024

12:30 PM America/New_York

Host: NYU Swartz

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NYU Swartz

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Abstract

Perhaps the most impressive aspect of the way the brain enables us to act on the sensory world is its flexibility. We can make a general inference about many sensory features (rating the ripeness of mangoes or avocados) and map a single stimulus onto many choices (slicing or blending mangoes). These can be thought of as flexibly mapping many (features) to one (inference) and one (feature) to many (choices) sensory inputs to actions. Both theoretical and experimental investigations of this sort of flexible sensorimotor mapping tend to treat sensory areas as relatively static. Models typically instantiate flexibility through changing interactions (or weights) between units that encode sensory features and those that plan actions. Experimental investigations often focus on association areas involved in decision-making that show pronounced modulations by cognitive processes. I will present evidence that the flexible formatting of visual information in visual cortex can support both generalized inference and choice mapping. Our results suggest that visual cortex mediates many forms of cognitive flexibility that have traditionally been ascribed to other areas or mechanisms. Further, we find that a primary difference between visual and putative decision areas is not what information they encode, but how that information is formatted in the responses of neural populations, which is related to difference in the impact of causally manipulating different areas on behavior. This scenario allows for flexibility in the mapping between stimuli and behavior while maintaining stability in the information encoded in each area and in the mappings between groups of neurons.

Topics

TBDcognitiondecision-makingflexible behaviourinferenceneural populationssensorimotor mappingsensory featuresstimulus-responsevisual cortex

About the Speaker

Marlene Cohen

Prof.

University of Chicago

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