Scaling and intermittency of brain events as a manifestation of consciousness (Contributo in atti di convegno)

Type
Label
  • Scaling and intermittency of brain events as a manifestation of consciousness (Contributo in atti di convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1063/1.4776519 (literal)
Alternative label
  • Paradisi P., Allegrini P., Gemignani A., Laurino M., Menicucci D., Piarulli A. (2013)
    Scaling and intermittency of brain events as a manifestation of consciousness
    in Physics, Computation, and the Mind - Advances And Challenges At Interfaces. 12th Granada Seminar on Computational and Statistical Physics, La Herradura, Spain, 17-21 September 2012
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Paradisi P., Allegrini P., Gemignani A., Laurino M., Menicucci D., Piarulli A. (literal)
Pagina inizio
  • 151 (literal)
Pagina fine
  • 161 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://scitation.aip.org/content/aip/proceeding/aipcp/10.1063/1.4776519 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#volumeInCollana
  • 1510 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 11 (literal)
Note
  • PuMa (literal)
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR-ISTI, Pisa, Italy; CNR-IFC, Pisa, Italy; University of Pisa, Italy; CNR-IFC, Pisa, Italy; CNR-IFC, Pisa, Italy; Scuola Superiore Sant'Anna, Pisa, Italy (literal)
Titolo
  • Scaling and intermittency of brain events as a manifestation of consciousness (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#isbn
  • 978-0-7354-1128-9 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#curatoriVolume
  • Pedro L. Garrido, Joaquín Marro, Joaquín J. Torres, J. M. Cortés (literal)
Abstract
  • We discuss the critical brain hypothesis and its relationship with intermittent renewal processes displaying power-law decay in the distribution of waiting times between two consecutive renewal events. In particular, studies on complex systems in a \"critical\" condition show that macroscopic variables, integrating the activities of many individual functional units, undergo fluctuations with an intermittent serial structure characterized by avalanches with inverse-power-law (scale-free) distribution densities of sizes and inter-event times. This condition, which is denoted as \"fractal intermittency\", was found in the electroencephalograms of subjects observed during a resting state wake condition. It remained unsolved whether fractal intermittency correlates with the stream of consciousness or with a non-task-driven default mode activity, also present in non-conscious states, like deep sleep. After reviewing a method of scaling analysis of intermittent systems based of event-driven random walks, we show that during deep sleep fractal intermittency breaks down, and re-establishes during REM (Rapid Eye Movement) sleep, with essentially the same anomalous scaling of the pre-sleep wake condition. From the comparison of the pre-sleep wake, deep sleep and REM conditions we argue that the scaling features of intermittent brain events are related to the level of consciousness and, consequently, could be exploited as a possible indicator of consciousness in clinical applications. (literal)
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