Speaker:

Professor Sylvain Baillet

Montreal Neurological Institute, McGill University, Montreal, Quebec, Canada

Title: "Perception as prediction: network architectures of brain perceptual inferences"

Abstract: A difficult research question in systems neuroscience is the elucidation of mechanisms of information integration in brain networks: How do sensory inputs modify the ongoing activity of the brain? How are input signals in brain networks via bottom-up signaling? What is the nature of top-down influences from higher-order brain circuits on sensory perception?

We recently proposed a model that bottom-up signaling and top-down modulations in hierarchical brain networks could be enabled by polyrhythmic and interdependent oscillatory brain activity. This mechanistic framework implements a generic form of contextual predictive inference of input signals into brain networks. In essence, this theoretical framework is aligned with the principles of perceptual inference, which predict that the large spontaneous, resting brain activity during wakefulness (25% of whole-body metabolism) constantly implements the self’s representation of the environment.
Inspired by this framework, I will present our work with Peter Donhauser, who recently proposed a neural network architecture that models brain predictions generated during speech listening about upcoming speech sounds and words. The approach enables the functional separation between uncertainty-related and error-related neural activity captured in electrophysiology, in ecological speech listening situations.

 

About Neuroscience Seminars

Neuroscience seminars at the QBI play a major role in the advancement of neuroscience in the Asia-Pacific region. The primary goal of these seminars is to promote excellence in neuroscience through the exchange of ideas, establishing new collaborations and augmenting partnerships already in place.

The scheduled QBI Neuroscience Seminar series are held on Wednesdays from 11am-12pm in the Level 7 Auditorium of the Queensland Brain Institute, Building 79, St Lucia Campus, The University of Queensland. Additional seminars may be held at other times as listed below.

 

Neuroscience Seminars archive 2005-2016