A biztonság kedvéért, az előadás helyszíne külön is:
Okóber 6-a utca 7, 101-es terem (1. emelet)
Lengyel Máté
Tisztelt Kollégák,
Csak a biztonság kedvéért, az előadás a
2015. június 9-én kedden du. 5 órakor Gustavo Deco (Universitat Pompeu Fabra, Barcelona)
előadást tart a CEU Kognitívtudományi Tanszékén "The Dynamics of Resting Fluctuations
in the Brain" címmel. Részletek a levél alján (figyelem, a tanszék nemrég új helyre
költözött). Minden érdeklődőt szeretettel várunk.
Az előadó néhány publikációja a közelmúltból:
Tauste Campo A, Martinez-Garcia M, Nácher V, Luna R, Romo R, Deco G. Task-driven intra-
and interarea communications in primate cerebral cortex. Proc Natl Acad Sci USA
112:4761-6, 2015.
Bettinardi RG, Tort-Colet N, Ruiz-Mejias M, Sanchez-Vives MV, Deco G. Gradual emergence
of spontaneous correlated brain activity during fading of general anesthesia in rats:
Evidences from fMRI and local field potentials. Neuroimage 114:185-98, 2015.
Deco G, Kringelbach ML. Great expectations: using whole-brain computational connectomics
for understanding neuropsychiatric disorders. Neuron 84:892-905, 2014.
Deco G, Ponce-Alvarez A, Hagmann P, Romani GL, Mantini D, Corbetta M. How local
excitation-inhibition ratio impacts the whole brain dynamics. J Neurosci 34:7886-98, 2014
Cabral J, Kringelbach ML, Deco G. Exploring the network dynamics underlying brain
activity during rest. Prog Neurobiol 114:102-31, 2014.
Ponce-Alvarez A, Thiele A, Albright TD, Stoner GR, Deco G. Stimulus-dependent variability
and noise correlations in cortical MT neurons. Proc Natl Acad Sci USA 110:13162-7, 2013.
Üdvözlettel,
Lengyel Máté
--
Computational and Biological Learning Lab
Cambridge University Engineering Department
Trumpington Street, Cambridge CB2 1PZ, UK
tel: +44 (0)1223 748 532, fax: +44 (0)1223 332 662
Department of Cognitive Science
Central European University
Oktober 6 street 7, Budapest H-1051, Hungary
tel: +36 1 887 5142 , fax: +36 1 887 5010
email: m.lengyel(a)eng.cam.ac.uk
web:
www.eng.cam.ac.uk/~m.lengyel
***
The CEU Department of Cognitive Science cordially invites you to a talk (as part of its
Departmental Colloquium series) by
Gustavo Deco (Universitat Pompeu Fabra, Barcelona, Spain)
Date: Tuesday, June 9, 2015 - 17:00-18:30
Location: Department of Cognitive Science, CEU, Oktober 6 street 7, room 101.
The Dynamics of Resting Fluctuations in the Brain
The grand average functional connectivity (FC) of a resting brain captures properly the
well- structured spatial correlations between different brain areas. Whole-brain -models
explicitly linking spontaneous local neuronal dynamics with the tractography based
anatomical structure of the brain are able to explain the emergence of those spatial
resting correlations. Nevertheless, resting activity is not only spatially structured but
also shows a very stereotypical temporal structure which is characterized by rapid
transitions switching between a few discrete FC states across time. In this talk, we
introduce a powerful theoretical framework, which allows us to demonstrate that resting
functional connectivityFC dynamics (FCD) constrains more strongly the dynamical working
point of whole-brain models. Furthermore, using a very general neural mass model based on
the normal form of a Hopf bifurcation we are able to demonstrate that the temporal
dynamics of resting state fluctuations emerges at the edge of the transition between
asynchronous to oscillatory behavior. Even more importantly, at that particular working
point the global metastability of the whole brain is maximized. By optimizing the spectral
characteristics of each local brain node, we discover the dynamical core of the brain,
i.e. the set of nodes, which drives by oscillations the rest of the whole brain. This
dynamical core can be interpreted as the “memory” core of nodes sustaining consciousness.