Power-Law Scaling in the Brain Surface Electric Potential

PLoS Computational Biology, Год журнала: 2009, Номер 5(12), С. e1000609 - e1000609

Опубликована: Дек. 17, 2009

Recent studies have identified broadband phenomena in the electric potentials produced by brain. We report finding of power-law scaling these signals using subdural electrocorticographic recordings from surface human cortex. The power spectral density (PSD) potential has form 80 to 500 Hz. This index, , is conserved across subjects, area cortex, and local neural activity levels. shape PSD does not change with increases cortical activity, but amplitude, increases. observe a “knee” spectra at implying existence characteristic time scale . Below we explore two-power-law forms PSD, demonstrate that there are activity-related fluctuations amplitude process lying beneath rhythms. Finally, illustrate through simulation how, small-scale, simplified neuronal models could lead observations. suggests new paradigm non-oscillatory “asynchronous,” scale-free, changes potentials, corresponding mean population-averaged firing rate, complement prevalent “synchronous” rhythm-based paradigm.

Язык: Английский

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Neural synchrony in cortical networks: history, concept and current status

Frontiers in Integrative Neuroscience, Год журнала: 2009, Номер 3

Опубликована: Янв. 1, 2009

Following the discovery of context-dependent synchronization oscillatory neuronal responses in visual system, role neural synchrony cortical networks has been expanded to provide a general mechanism for coordination distributed activity patterns. In current paper, we present an update status this hypothesis through summarizing recent results from our laboratory that suggest important new insights regarding mechanisms, function and relevance phenomenon. first part, derived animal experiments mathematical simulations novel explanations mechanisms zero nero-zero phase lag synchronization. second shall discuss expectancy during perceptual organization its conscious experience. This will be followed by evidence indicates addition supporting cognition, is abnormal major brain disorders, such as schizophrenia autism spectrum disorders. We conclude paper with suggestions further research well critical issues need addressed future studies.

Язык: Английский

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New insights into the relationship between dopamine, beta oscillations and motor function

Trends in Neurosciences, Год журнала: 2011, Номер 34(12), С. 611 - 618

Опубликована: Окт. 27, 2011

Язык: Английский

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Rhythms of the hippocampal network

Nature reviews. Neuroscience, Год журнала: 2016, Номер 17(4), С. 239 - 249

Опубликована: Март 10, 2016

Язык: Английский

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Oscillatory Synchronization in Large-Scale Cortical Networks Predicts Perception

Neuron, Год журнала: 2011, Номер 69(2), С. 387 - 396

Опубликована: Янв. 1, 2011

Язык: Английский

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