Gamma, alpha, delta, and theta oscillations govern cognitive processes

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

doi:10.1016/s0167-8760(00)00145-8

Cited by 1,030 publications

(679 citation statements)

References 25 publications

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“…Moreover, it has been proposed that brain oscillatory systems act as possible communication networks with functional relationships to the integrative brain functions [254]. This proposition is based on the fact that in an electric system optimal transmission of signals is reached when subsystems are tuned to the same frequency range.…”

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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Section: Electroencephalogrammentioning

confidence: 99%

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

Fingelkurts

Neves

2010

Physics of Life Reviews

168

233

View full text Add to dashboard Cite

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“…The correlations had a medium effect size and showed that a decrease in delta power was related to higher accuracy and shorter latencies. It has been suggested that delta activity is associated with task difficulty (Harmony et al, 1996) and decision making (Basar et al, 2001). This notion might be in agreement with the relation that we found between delta IBP and the behavioral measures, with later word repetitions requiring less decision making effort.…”

Section: Induced Band Powermentioning

confidence: 99%

“…Because additional repetitions of the words (up to nine times) will result in better memory retrieval, we hypothesized that multiple repetitions affect the later ERP recollection component rather than the earlier ERP familiarity component. Furthermore, because there is evidence that the delta, theta, and alpha frequency bands are sensitive to task difficulty and decision making (e.g., Basar et al, 2001;Gevins et al, 1997;Harmony et al, 1996), it was anticipated that the delta and theta bands will show a decrease and the alpha bands will show an increase in activity across the nine word repetitions.…”

Section: Introductionmentioning

confidence: 99%

Changes in brain electrical activity during extended continuous word recognition

et al. 2005

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Twenty healthy subjects (10 men, 10 women) participated in an EEG study with an extended continuous recognition memory task, in which each of 30 words was randomly shown 10 times and subjects were required to make old vs. new decisions. Both event-related brain potentials (ERPs) and induced band power (IBP) were investigated. We hypothesized that repeated presentations affect recollection rather than familiarity.For the 300-to 500-ms time window, an dold/newT ERP effect was found for the first vs. second word presentations. The correct recognition of an doldT word was associated with a more positive waveform than the correct identification of a new word. The old/new effect was most pronounced at and around the midline parietal electrode position. For the 500-to 800-ms time window, a linear repetition effect was found for multiple word repetitions. Correct recognition after an increasing number of repetitions was associated with increasing positivity. The multiple repetitions effect was most pronounced at the midline central (Cz) and fronto-central (FCz) electrode positions and reflects a graded recollection process: the stronger the memory trace grows, the more positive the ERP in the 500-to 800-ms time window. The ERP results support a dual-processing model, with familiarity being discernable from a more graded recollection state that depends on memory strengths.For IBP, we found dold/newT effects for the lower-2 alpha, theta, and delta bands, with higher bandpower during doldT words. The lower-2 alpha dold/newT effect most probably reflects attentional processes, whereas the theta and delta effects reflect encoding and retrieval processes. Upon repeated word presentations, the magnitude of induced delta power in the 375-to 750-ms time window diminished linearly. Correlation analysis suggests that decreased delta power is moderately associated with faster decision speed and higher accuracy. D

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“…Power spectral signal analysis of spontaneous EEG activity constitutes one of the most important and most commonly used analytical tools for evaluating neurophysiological signals in health and also in diseases (Lopes Da Silva 1978;Basar 1980Basar , 2012Basar et al 2001;Basar and Guntekin 2013). A large body of evidence suggests that oscillatory activity in all frequency bands is linked to a broad variety of perceptual, sensorimotor, and cognitive operations (Basar et al 2001;Aoki et al 1999;Palva and Palva 2007).…”

Section: Introductionmentioning

confidence: 99%

Brain electrical activities of dancers and fast ball sports athletes are different

et al. 2014

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Exercise training has been shown not only to influence physical fitness positively but also cognition in healthy and impaired populations. However, some particular exercise types, even though comparable based on physical efforts, have distinct cognitive and sensorimotor features. In this study, the effects of different types of exercise, such as fast ball sports and dance training, on brain electrical activity were investigated. Electroencephalography (EEG) scans were recorded in professional dancer, professional fast ball sports athlete (FBSA) and healthy control volunteer groups consisting of twelve subjects each. In FBSA, power of delta and theta frequency activities of EEG was significantly higher than those of the dancers and the controls. Conversely, dancers had significantly higher amplitudes in alpha and beta bands compared to FBSA and significantly higher amplitudes in the alpha band in comparison with controls. The results suggest that cognitive features of physical training can be reflected in resting brain electrical oscillations. The differences in resting brain electrical oscillations between the dancers and the FBSA can be the result of innate network differences determining the talents and/or plastic changes induced by physical training.

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Gamma, alpha, delta, and theta oscillations govern cognitive processes

Cited by 1,030 publications

References 25 publications

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

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

Changes in brain electrical activity during extended continuous word recognition

Brain electrical activities of dancers and fast ball sports athletes are different

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