Are cognitive processes manifested in event-related gamma, alpha, theta and delta oscillations in the EEG?

Başar, Erol; Başar-Eroğlu, Canan; Karakaş, Sirel; Schürmann, Martin

doi:10.1016/s0304-3940(98)00934-3

Cited by 339 publications

(266 citation statements)

References 30 publications

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“…These basic EEG bands are assumed to reflect different functional processes in the brain [22,[232][233][234]. EEG oscillations have been intensively studied over the past years [24,27,[235][236][237][238][239][240][241][242][243][244][245][246]. As a result of this research, it is suggested that the oscillatory activity of neuronal assemblies reflected in characteristic EEG rhythms constitutes a mechanism by which the brain can regulate changes of a state in selected neuronal networks to cause qualitative transitions between modes of information processing [247].…”

Section: Electroencephalogrammentioning

confidence: 99%

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

Fingelkurts

Neves

2010

Physics of Life Reviews

167

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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Section: Electroencephalogrammentioning

confidence: 99%

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

Fingelkurts

Neves

2010

Physics of Life Reviews

167

233

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“…It has been suggested that delta activity is generated by cortico-cortical interactions with some subcortical contributions. Functionally, authors have proposed that the delta response is mainly related to signal detection and decision making (Basar-Eroglu et al, 1992;Basar et al, 1999;). …”

Section: Event-related Delta Band Changesmentioning

confidence: 99%

“…Since the proposal byStampfer and Basar (1985), the importance of the underlying delta and theta brain oscillations in the production of the P300 potential to a rare target stimulus has been extensively examined (Schurmann et al, 2001b;Basar et al, 1999;Basar-Eroglu et al, 1992;Demiralp et al 2001, Yordonova andKolev, 1996). According to Verleger (1995), the main portion of P300 power is not within the theta band, but within sub-delta and delta bands, especially as P300 is virtually abolished with a high-pass setting at 1.0 Hz (Duncan-Johnson and Donchin, 1979) or of 2.0 Hz (Jodo and Kayama, 1992).…”

Section: Introductionmentioning

confidence: 99%

“…Studies on normal individuals indicated that the delta response is possibly related to signal detection and decision making generated by a distributed network system (Basar-Eroglu et al, 1992;Basar et al, 1999;Schurmann et al, 2001a). On the other hand, event-related theta oscillations are believed to be related to fronto-limbic interactions (Basar et al, 1999;Karakas et al, 2000b;Miller et al, 1991), and are associated with a complex set of cognitive processes including alertness, arousal or readiness (Basar et al, 1999), memory-related processes (Yordanova and Kolev, 1998b), episodic encoding and retrieval processes, as revealed by event-related desynchronization/synchronization, (Klimesch et al, 1997;Klimesch et al, 1994) and selective attention and short-term memory (Basar-Eroglu et al, 1992;Basar et al, 1997;Demiralp and Basar, 1992;Karakas, 1997;Klimesch., 1999). Therefore individuals with suppressed delta and theta responses are likely to show deficits in cognitive functions that are mediated by these oscillatory processes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Delta and theta oscillations as risk markers in adolescent offspring of alcoholics

Rangaswamy

Jones

Porjesz

et al. 2007

International Journal of Psychophysiology

117

136

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Background-Visual P300 is consistently lower in alcohol dependent individuals, their offspring and subjects at risk. Delta and theta event related oscillations (ERO) are the major contributors to the P300 signal. The total and evoked power in delta and theta bands in the 300 to 700 millisecond post-stimulus window (corresponding to the zone of P3 maxima) was compared between adolescent offspring of alcoholics (high-risk) and age-matched normal controls (low-risk), to assess the utility of the risk markers.Methods-EEG was recorded during the performance of visual oddball task. The S-Transform algorithm decomposed the EEG signals into different frequency bands and the group differences in total and evoked power in the oscillatory responses during the P300 time window (300 to 700 ms) were analyzed using a multivariate design. Similar analysis was performed on P300 peak amplitudes for the target.Results-The high-risk group showed significantly lower parietal post-stimulus evoked and total power in the delta band for targets. A decrease in total power was seen centrally and parietally in theta band. The P300 peak amplitude in the parietal electrodes was also significantly lower in the high-risk group.Conclusions-The decreased total theta power and total and evoked delta power for visual targets in high risk individuals may serve as an endophenotypic marker in the development of alcoholism and other disinhibitory disorders. The differences seen between the offspring of alcoholics and controls may have a cholinergic basis. The ERO measures appear to be more robust than the P300 amplitude in differentiating the groups.

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“…The human electroencephalogram (EEG) contains multiple synchronous rhythms that reflect spatially and temporally ordered activity (Basar et al, 1999;Glass and Riding, 1999). Delta rhythms (0.5-2 Hz) are involved in signal detection and decision making (Basar-Eroglu et al, 1992); theta oscillations (4 -12 Hz) are related to cognitive processing and cortico-hippocampal interactions (Vinogradova, 1995); and gamma oscillations (30 -80 Hz) can be found in a variety of structures under different behavioral conditions (Basar et al, 1999;Ritz and Sejnowski, 1997;Singer and Gray, 1995).…”

Section: Introductionmentioning

confidence: 99%