Max Planck Institute for Dynamics and Self-Organization -- Department for Nonlinear Dynamics and Network Dynamics Group
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BCCN AG-Seminar

Friday, 23.03.2007 16 c.t.

Deciding about actions: The affordance competition hypothesis

by Dr. Paul Cisek
from Department of Physiology, University of Montreal, Canada

Location

Seminarraum Haus 2, 4. Stock (Bunsenstr.)

Abstract

Theories of decision-making and movement planning often assume tha these processes are separate and occur in series, with cognitive decision taken prior to the preparation of a unique action plan. However, neural data suggests that many of the same brain regions are involved in both, and that animals can process sensory information to partially prepare several movements in parallel. I will describe a computational model which suggests how multiple actions may be specified simultaneously within neural populations responsible for action guidance, and how decisions between these may take place through a process of biased competition. I will compare the model behavior to human psychophysical data, and the model activities to neural data recorded from the cerebral cortex of monkeys. Finally, I will use these results to describe a broad framework for interpreting cortical data from the perspective of interactive behavior.

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