Os reenviamos un mensaje sobre el próximo CBC Seminar de la Universitat Pompeu Fabra.
La Junta Directiva de la SEPEX
We have the pleasure to announce the next CBC Seminar on
FRIDAY, FEBRUARY 11, 2022, at 12:00 PM CET, aula 24.009
Joana Ribeiro Barbosa Cabral
from the Institute of Research in Life and Health Sciences, University of Minho
invited by Gustavo Deco
will give a talk entitled
Resonant waves drive long-range correlations in fMRI signals
Abstract: The fundamental principles driving spontaneous long-range correlations between distant brain areas – known as intrinsic functional connectivity – remain unclear. To investigate this, we develop an ultrafast functional Magnetic Resonance Imaging (fMRI) approach with unprecedented temporal resolution (38 milliseconds) in the rat brain. We detect a repertoire of principal components exhibiting standing wave properties, i.e., with phase relationships varying gradually across space and oscillating in time, driving in- and anti-phase synchronization across distinct cortical and subcortical structures. The spatial configuration, stability and peak frequency of these standing waves is found to depend on the sedation/anaesthesia state, with medetomidine sedation revealing the most stable (i.e., less damped) standing waves, resonating at frequencies extending up to 0.25 Hz. Our findings show that the complex activity patterns observed in resting-state fMRI signals result from the superposition of standing waves, supporting the hypothesis that intrinsic functional connectivity is inherently associated to resonance phenomena.
An article that you may want to read in preparation of the talk is here:
We look forward to seeing you all!
The CBC Seminar Series – Universitat Pompeu Fabra