On Neural Substrates of Cognition
نویسندگان
چکیده
Recent experiments with highresolution brain imaging techniques provide an amazing view on the complex spatio-temporal dynamics of cortical processes. There is ample of evidence pointing to frequent transitions between periods of large-scale synchronization and intermittent desynchronization at alpha-theta rates (period length of 0.1 s to 0.25s). These observations have been interpreted based on the cinematic model of cognitive processing. In the corresponding mathematical theories, brains are perceived as open thermodynamic systems converting noisy sensory data into meaningful knowledge. We employ a graph-theoretic model called neuropercolation, which extends the concept of phase transitions to large interactive populations of nerve cells. We show that normal brains operate at the edge of criticality, where phase transitions are manifested via intermittent phase synchronization. Cortical phase transitions are viewed as neural correlates of cognition and serve as basis for non-invasive cognitive monitoring using novel brain-computer interfaces. Keywords—EEG, Phase Transition, Brain Computer Interface (BCI), High-density Array.
منابع مشابه
TINS special issue: The Neural Substrates of Cognition The neural substrates of cognition
Introduction The reviews in this issue of TINS represent a particularly interesting subset of formal presentations at a meeting held last year in Madrid, Spain. This meeting was sponsored by the Juan March Foundation, was organized by myself, Adam Sillito and Javier Cudeiro, and was entitled ‘The Neural Substrates of Cognition’. Further details of the meeting, including a list of speakers, can ...
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