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UID:20250719T082507EDT-6265i4U6Kd@132.216.98.100
DTSTAMP:20250719T122507Z
DESCRIPTION:\n	Séminaire Applied Mathematics/Mathématiques appliquées\n\nBur
 nside Hall 920\, ºÃÉ«TV\n\nAround the complex interplay of spat
 ial organization\, heterogeneity and collective dynamics of neuronal netwo
 rks\n\nJonathan Touboul\, Inria et College de France\n\nSite web : http://
 www.dms.umontreal.ca/~mathapp/index_fr.html\n\nAbstract:\n\nIncreasing bio
 logical evidence suggests that the anatomical and functional organization 
 of neuronal networks of the brain subtend their function. This talk will d
 iscuss a few questions related to this interplay and on which mathematical
  approach can shed new light. First\, I will discuss the characterization 
 of large-scale dynamics of randomly connected neural networks\, in particu
 lar taking into account their multi-scale connectivity patterns. I will in
 vestigate the role of noise and disorder in these macroscopic dynamics\, w
 ith a particular focus on a mysterious and somewhat paradoxical role of no
 ise or disorder in synchronizing neurons. Closer from biology\, I will pre
 sent a new dataset and analyses on the functional organization of the visu
 al cortex that tend to indicate that orientation and spatial frequency of 
 simple stimuli organize within continuous maps with common punctual singul
 arities that have a very particular pinwheel-dipole topology. Using argume
 nts from planar topology\, I will show that how these may reveal that exha
 ustivity and parsimony of representation may be fundamental organization p
 rinciples of the primary visual area.\n
DTSTART:20161128T200000Z
DTEND:20161128T210000Z
LOCATION:room 920\, Burnside Hall\, CA\, QC\, Montreal\, H3A 0B9\, 805 rue 
 Sherbrooke Ouest
SUMMARY:Jonathan Touboul\, Inria et College de France
URL:/mathstat/channels/event/jonathan-touboul-inria-et
 -college-de-france-264366
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