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CATEGORIES:Brain Mapping Unit Networks Meeting and the Cambri
 dge Connectome Consortium
SUMMARY:Cortical phase\, amplitude\, and cross-frequency i
 nteractions during task performance and rest. - Ma
 tias Palva\, Neuroscience Center\, University of H
 elsinki\, Finland
DTSTART;TZID=Europe/London:20140930T110000
DTEND;TZID=Europe/London:20140930T120000
UID:TALK54878AThttp://talks.cam.ac.uk
URL:http://talks.cam.ac.uk/talk/index/54878
DESCRIPTION:Mapping the anatomical patterns\, topology\, and d
 ynamics of cortical connectivity\, both functional
  and structural\, is central for elucidating the s
 ystems-level mechanisms governing brain dynamics i
 n vivo. Complementing the large body of studies us
 ing MRI-based fMRI and DTI/DSI maps of functional 
 and structural connectivity\, respectively\, sever
 al approaches have recently been presented for usi
 ng MEG and EEG in the electrophysiological mapping
  of cortical connectivity. In my presentation\, I 
 will discuss our pipeline for MEG/EEG-source-recon
 struction based interaction mapping as well as bot
 h the commonly and the more rarely acknowledged pi
 tfalls in the identification of phase and amplitud
 e correlations in electrophysiological data.\n\nTh
 e phenomenology and functional significance of osc
 illatory coupling can be addressed both with resti
 ng-state analyses and cognitive paradigms. I will 
 present our recent MEG and SEEG observations linki
 ng transient brain dynamics with the traditional c
 onnectivity estimates. We have also used MEG to ma
 p the networks of within- and cross-frequency phas
 e synchrony observed during visual working memory 
 retention. These phase interactions are memory loa
 d dependent and behaviorally significant\, and may
  hence yield insight both into the neuronal substr
 ates of working memory and into the mechanisms bri
 dging neuronal processing taking place concurrentl
 y in multiple frequency bands. Overall\, these dat
 a emphasize both the putative functional significa
 nce of the interactions among cortical oscillation
 s and that several technical challenges must be ov
 ercome to fully utilize the potential of electroph
 ysiological methods in the study of the human conn
 ectome.\n
LOCATION:MRC CBU lecture theatre\, 15 Chaucer Road
CONTACT:Mikail Rubinov
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