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UID:0-883@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20230627T110000
DTEND;TZID=Europe/Paris:20230627T120000
DTSTAMP:20230619T120150Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-olesia-dogonasheva-ens-paris-and-moscow-university/
SUMMARY:Séminaire du LPTMS : Olesia Dogonasheva (ENS Paris and Moscow Univ
 ersity) - Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°
 530 - 27 Juin 23 11:00
DESCRIPTION:Delta-theta-gamma interplay for contextualized speech parsing\n
 Olesia Dogonasheva (ENS Paris and Moscow University)\nHybrid: onsite semin
 ar + zoom.\n\nhttps://cnrs.zoom.us/j/91877559782?pwd=UnhCQlEzVTJ1Y0FLczNIQ
 0hIdWJPdz09\n\nMeeting ID: 918 7755 9782\n\nPasscode: Fab4G9\n\nRhythms st
 retching across multiple interacting frequencies and spatial scales are ub
 iquitous in brain activity during complex cognitive tasks. Yet their funct
 ional significance is hotly debated between a structural epiphenomenon of 
 brain activity and mechanisms implementing computations. Speech processing
 \, with its temporal cadence and multi-scale of syntactic invariants (syll
 ables\, words)\, is a paradigmatic example where rhythms have been propose
 d to play a key role\, with a speech-modulated hierarchical structure of i
 ntercoupled cortical oscillations correlating with successful comprehensio
 n. Experiments show that speech recognition remains largely intact when co
 mpressed up to a certain temporal factor\, and the re-spacing of chunks of
  incomprehensible compressed speech with silences recovers comprehension. 
 Previous models proposed that theta-gamma interactions enable syllable par
 sing. However\, this did not resolve questions about word/phrase recogniti
 on and\, notably\, the observed role of delta rhythm in top-down informati
 on flow. To address the above questions\, we propose an inference model (B
 RyBI) that incorporates a wide range of brain-rhythm data mechanistically 
 and accounts for time-invariant word recognition. Our model predicts that 
 delta-implemented word context allows for syllable parsing without precise
  locking of the theta-rhythmic activity.
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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