Blog de la Biblioteca de Matemàtiques i Informàtica

SIMBa: Time-dependent branching processes: a model of oscillating neuronalavalanches

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SIBMa

El proper dimecres, 13 de gener, se celebrarà una nova xerrada —en format virtual— del Seminari Informal de Matemàtiques de Barcelona (SIMBa).

Speaker: Rosalba García Millán
Universitat: Imperial College London.

Data: Wednesday, January 13th, 2021.
Hora: 12:00,virtual coffee break; 12:20, talk.
Lloc: Zoom (the link will be posted on our website).
Idioma: English.

Títol: Time-dependent branching processes: a model of oscillating neuronalavalanches.
Resum: Recently, neuronal avalanches have been observed to display oscilla-tions, a phenomenon regarded as the co-existence of a scale-free be-haviour (the avalanches close to criticality) and scale-dependent dy-namics (the oscillations). Ordinary continuous-time branching pro-cesses with constant extinction and branching rates are commonly usedas models of neuronal activity, yet they lack any such time-dependence.In my talk, I will show how we extended a basic branching process byallowing the extinction rate to oscillate in time as a new model to de-scribe cortical dynamics. I will discuss about some observables, suchas the avalanche shape, that we calculated in closed form by meansof a perturbative field theory, and compared to available experimentalresults.

 

Si voleu estar al cas de les xerrades previstes, podeu consultar el calendari. Si voleu proposar una xerrada, ompliu el formulari. Si voleu contactar amb els responsables podeu escriure un missatge a seminari(dot)simba(at)ub(dot)edu.

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