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Title: Active Noise Genesis and Memory Processes in Recurrent Neural Networks
Originating Office: IAS
Speaker: Fukai, Tomoki
Issue Date: 19-Jul-2013
Event Date: 19-Jul-2013
Group/Series/Folder: Record Group 8.15 - Institute for Advanced Study
Series 3 - Audio-visual Materials
Location: 8.15:3 EF
Notes: StatPhysHK Conference. Talk no. 16
Title from title slide.
IAS Program on Statistical Physics and Computational Neuroscience, held 2-19 July, 2013, at Hong Kong University of Science and Technology. Sponsors, Hong Kong Baptist University, Croucher Foundation, K. C. Wong Education Foundation.
StatPhysHK Conference, a satellite of STATPHYS 25, held 17-19 July, 2013, at Hong Kong University of Science and Technology and Hong Kong Baptist University.
Abstract: Activity of cortical neurons is highly irregular and variable, suggesting that noise may play a crucial role in brain's information processing. However, the origin of this noise and its functional implications remain elusive. Recent experiments suggest that excitatory postsynaptic potentials (EPSPs) between cortical neurons obey long-tailed, typically lognormal, distributions in the neocortex and hippocampus. This implies that some cortical synapses are extremely strong. I show that such distributions can generate optimal internal noise for gating spike transmissions in recurrent neural networks. I demonstrate how this noise genesis improves memory processes, such as associative memory and working memory. The long-tailed EPSP distribution may challenge the conventional view that cortical neural networks are designed for parallel distributed processing with weak synapses.
Duration: 45 min.
Appears in Series:8.15:3 - Audio-visual Materials
Videos for Public -- Distinguished Lectures