Please join Bilkent University’s Psychology Department on Wednesday for the virtual visit of Prof. Paul Cisek.
Speaker: Paul Cisek. Université de Montréal
“Rethinking behavior in the light of evolution”
Date: Wednesday, 26 October 2022
***This is an online seminar. To request the event link, please send a message to department.
In psychology and neuroscience, the human brain is usually described as an information processing system that encodes and manipulates representations of knowledge to produce plans of action. This view leads to a decomposition of brain functions into putative processes such as object recognition, memory, decision-making, action planning, etc., inspiring the search for the neural correlates of these processes. However, neurophysiological data does not support many of the predictions of these classic subdivisions. Instead, there is divergence and broad distribution of functions that should be unified, mixed representations combining functions that should be distinct, and a general incompatibility with the conceptual subdivisions posited by theories of information processing. In this talk, I will explore the possibility of resynthesizing a different set of functional subdivisions, guided by the growing body of data on the evolutionary process that produced the human brain. I will summarize, in chronological order, a proposed sequence of innovations that appeared in nervous systems along the lineage that leads from the earliest multicellular animals to humans. Along the way, functional subdivisions and elaborations will be introduced in parallel with the neural specializations that made them possible, gradually building up an alternative conceptual taxonomy of brain functions. These functions emphasize mechanisms for real-time interaction with the world, rather than for building explicit knowledge of the world, and the relevant representations emphasize pragmatic outcomes rather than decoding accuracy, mixing variables in the way seen in real neural data. I suggest that this alternative taxonomy may better delineate the real functional pieces into which the human brain is organized, and can offer a more natural mapping between behavior and neural mechanisms.
About the speaker:
Paul Cisek is Professor in the Department of Neuroscience at the University of Montreal. He has a background in computer science and artificial intelligence, doctoral training in computational neuroscience with Stephen Grossberg and Daniel Bullock, and postdoctoral training in neurophysiological recording in non-human primates with Stephen Scott and John Kalaska. His work combines these techniques into an interdisciplinary approach to understanding how the brain controls our interactions with the world. In particular, his theoretical work suggests that the brain is organized as a system of parallel sensorimotor streams that have been differentiated and elaborated over millions of years of evolution, and his empirical work investigates the neural dynamics of how potential actions are specified and how they compete in the cortical and subcortical circuits of humans and other primates. (www.cisek.org/pavel)