Criticality between Cortical States

Autor(es):Mostrar menos -

Fontenele, Antonio J. ^[1] ; de Vasconcelos, Nivaldo A. P. ^{[1, 2, 3, 4]} ; Feliciano, Thais ^[1] ; Aguiar, Leandro A. A. ^{[1, 5]} ; Soares-Cunha, Carina ^{[3, 4]} ; Coimbra, Barbara ^{[3, 4]} ; Dalla Porta, Leonardo ^{[1, 6]} ; Ribeiro, Sidarta ^[7] ; Rodrigues, Ana Joao ^{[3, 4]} ; Sousa, Nuno ^{[3, 4]} ; Carelli, V, Pedro ; Copelli, Mauro ^[8]

Afiliação do(s) autor(es)

^[1] Fed Univ Pernambuco UFPE, Phys Dept, BR-50670901 Recife, PE - Brazil

^[2] Univ Fed Pernambuco, Dept Biomed Engn, BR-50670901 Recife, PE - Brazil

^[3] Univ Minho, Sch Med, Life & Hlth Sci Res Inst ICVS, P-4710057 Braga - Portugal

^[4] ICVS 3Bs PT Govt Associate Lab, P-4806909 Braga - Portugal

^[5] Univ Fed Rural Pernambuco UFRPE, Dept Morfol & Fisiol Anim, BR-52171900 Recife, PE - Brazil

^[6] Inst Invest Biomed August Pi i Sunyer IDIBAPS, Syst Neurosci, Barcelona 08036 - Spain

^[7] Fed Univ Rio Grande do Norte UFRN, Brain Inst, BR-59056450 Natal, RN - Brazil

^[8] Carelli, Pedro, V, Fed Univ Pernambuco UFPE, Phys Dept, BR-50670901 Recife, PE - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Physical Review Letters; v. 122, n. 20 MAY 21 2019.
• Citações Web of Science: 11

Resumo

Since the first measurements of neuronal avalanches, the critical brain hypothesis has gained traction. However, if the brain is critical, what is the phase transition? For several decades, it has been known that the cerebral cortex operates in a diversity of regimes, ranging from highly synchronous states (with higher spiking variability) to desynchronized states (with lower spiking variability). Here, using both new and publicly available data, we test independent signatures of criticality and show that a phase transition occurs in an intermediate value of spiking variability, in both anesthetized and freely moving animals. The critical exponents point to a universality class different from mean-field directed percolation. Importantly, as the cortex hovers around this critical point, the avalanche exponents follow a linear relation that encompasses previous experimental results from different setups and is reproduced by a model. (AU)

• Processo FAPESP: 13/07699-0 - Centro de Pesquisa, Inovação e Difusão em Neuromatemática - NeuroMat
• Beneficiário: Oswaldo Baffa Filho
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs