Different frequencies for different scales of cortical integration: from local gamma to long range alpha/theta synchronization

Stein, Astrid von; Sarnthein, Johannes

doi:10.1016/s0167-8760(00)00172-0

Cited by 1,371 publications

(1,053 citation statements)

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“…Our present finding of intermittent long-range synchrony at all passbands from theta to epsilon (aka high gamma) conflicts with the suggestion (Kopell et al, 2000;Von Stein and Sarnthein, 2000;Von Rullen and Koch, 2003) that long-range synchrony occurs only in low frequency bands (Arieli et al, 1995), while gamma oscillations are synchronous only in local networks or at most between a few cortical areas (Eckhorn, 1994;Steriade et al, 1996;Engel et al, 1991b;Roelfsema et al, 1997). In fact the suggestion that theta/alpha or theta/apha/beta synchrony is global while gamma or beta/gamma-synchrony is local has already been negated by numerous reports of long-range gamma synchrony coinciding with various conscious experiences (Haig et al, 2000;Bhattacharya et al, 2001;Gruber et al, 2001;Lutz et al, 2002;Summerfield and Mangels, 2005).…”

Section: Comparison Of Our Results With the Literaturecontrasting

confidence: 99%

EEG synchrony during a perceptual-cognitive task: Widespread phase synchrony at all frequencies

Pockett

Bold

Freeman

2009

Clinical Neurophysiology

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Section: Comparison Of Our Results With the Literaturecontrasting

confidence: 99%

EEG synchrony during a perceptual-cognitive task: Widespread phase synchrony at all frequencies

Pockett

Bold

Freeman

2009

Clinical Neurophysiology

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“…An EEG (or more generally electro-magnetic) field 34 has structural and dynamic properties enabling the brain, which produces it, to register and appropriately integrate disparate stimuli (or internal mental images) into a unified and coherent spatial-temporal pattern(s) [23,97,132,225,226].…”

Section: Electroencephalogrammentioning

confidence: 99%

Natural world physical, brain operational, and mind phenomenal space–time

Fingelkurts

Neves

2010

Physics of Life Reviews

168

233

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Concepts of space and time are widely developed in physics. However, there is a considerable lack of biologically plausible theoretical frameworks that can demonstrate how space and time dimensions are implemented in the activity of the most complex life-system -the brain with a mind. Brain activity is organized both temporally and spatially, thus representing space-time in the brain. Critical analysis of recent research on the space-time organization of the brain's activity pointed to the existence of so-called operational space-time in the brain. This space-time is limited to the execution of brain operations of differing complexity. During each such brain operation a particular short-term spatio-temporal pattern of integrated activity of different brain areas emerges within related operational space-time. At the same time, to have a fully functional human brain one needs to have a subjective mental experience. Current research on the subjective mental experience offers detailed analysis of space-time organization of the mind. According to this research, subjective mental experience (subjective virtual world) has definitive spatial and temporal properties similar to many physical phenomena. Based on systematic review of the propositions and tenets of brain and mind space-time descriptions, our aim in this review essay is to explore the relations between the two. To be precise, we would like to discuss the hypothesis that via the brain operational space-time the mind subjective space-time is connected to otherwise distant physical space-time reality.Key words: spatial, temporal, consciousness, cognition, operation, architectonics, EEG, field, metastability, physics, coordinative dynamics, self-organization, cortex.

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“…Oscillations in the beta/gamma range have been linked to synchronization in local cortical networks whereas lower frequencies preferentially establish synchronization over longer distances [7]. However, recent work has shown that long-range synchronization can also occur at substantially higher frequencies (>30 Hz) and that even zero phase-lag synchronization is compatible with conduction delays [8].…”

Section: Introductionmentioning

confidence: 99%