EEG alpha power and alpha power asymmetry in sleep and wakefulness

Benca, Ruth M.; Obermeyer, William H.; Larson, Christine L.; Yun, Blenda; Dolski, Isa; Kleist, Kenneth D.; Weber, Stephanie; Davidson, Richard J.

doi:10.1111/1469-8986.3640430

Cited by 75 publications

(42 citation statements)

References 36 publications

(19 reference statements)

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“…According to the wakefulness literature, an increase in alpha power would rather be associated with cortical inhibition than with cortical excitation. In agreement with this hypothesis, Benca et al (1999) suggested that increased alpha power might represent cortical deactivation during sleep. If we interpret our results in line with the latter hypothesis, the increased alpha power in response to first names would be associated with an inhibition process resulting in a diminished processing of the first names.…”

Section: Discussionmentioning

confidence: 69%

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Alpha reactivity to first names differs in subjects with high and low dream recall frequency

Ruby¹,

Blochet²,

Eichenlaub³

et al. 2013

Front. Psychol.

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Studies in cognitive psychology showed that personality (openness to experience, thin boundaries, absorption), creativity, nocturnal awakenings, and attitude toward dreams are significantly related to dream recall frequency (DRF). These results suggest the possibility of neurophysiological trait differences between subjects with high and low DRF. To test this hypothesis we compared sleep characteristics and alpha reactivity to sounds in subjects with high and low DRF using polysomnographic recordings and electroencephalography (EEG). We acquired EEG from 21 channels in 36 healthy subjects while they were presented with a passive auditory oddball paradigm (frequent standard tones, rare deviant tones and very rare first names) during wakefulness and sleep (intensity, 50 dB above the subject's hearing level). Subjects were selected as High-recallers (HR, DRF = 4.42 ± 0.25 SEM, dream recalls per week) and Low-recallers (LR, DRF = 0.25 ± 0.02) using a questionnaire and an interview on sleep and dream habits. Despite the disturbing setup, the subjects' quality of sleep was generally preserved. First names induced a more sustained decrease in alpha activity in HR than in LR at Pz (1000–1200 ms) during wakefulness, but no group difference was found in REM sleep. The current dominant hypothesis proposes that alpha rhythms would be involved in the active inhibition of the brain regions not involved in the ongoing brain operation. According to this hypothesis, a more sustained alpha decrease in HR would reflect a longer release of inhibition, suggesting a deeper processing of complex sounds than in LR during wakefulness. A possibility to explain the absence of group difference during sleep is that increase in alpha power in HR may have resulted in awakenings. Our results support this hypothesis since HR experienced more intra sleep wakefulness than LR (30 ± 4 vs. 14 ± 4 min). As a whole our results support the hypothesis of neurophysiological trait differences in high and low-recallers.

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Section: Discussionmentioning

confidence: 69%

“…However, few studies investigated alpha activity in HR and LR during sleep (Goodenough et al, 1959; Lewis et al, 1966; Dumermuth et al, 1983; Benca et al, 1999; Cantero et al, 2002), and to our knowledge no study investigated alpha activity induced by stimulations during sleep and wakefulness in HR and LR.…”

Section: Introductionmentioning

confidence: 96%

Alpha reactivity to first names differs in subjects with high and low dream recall frequency

Ruby¹,

Blochet²,

Eichenlaub³

et al. 2013

Front. Psychol.

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show abstract

“…The suppression is more pronounced over the left hemisphere (being the dominant hemisphere in all our subjects). Asymmetry of waking EEG alpha power in frontal regions has been correlated with waking emotional reactivity (19). Davidson showed that such symmetry exists in depressed (20) and anxious patients (21).…”

Section: Discussionmentioning

confidence: 99%

Quantitative electroencephalogram (qEEG) in combat veterans with post-traumatic stress disorder (PTSD)

Jokić‐Begić

Begić

2003

Nordic Journal of Psychiatry

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Only a small number of studies have used quantitative electroencephalography (qEEG) in research of the post-traumatic stress disorder (PTSD). The results are not consistent. The aim of the present investigation was to compare qEEG in combat veterans with and without PTSD. The hypothesis is that differences among qEEG characteristics will be found regarding the presence/absence of PTSD. Seventy-nine combat veterans with PTSD comprised the experimental group and 37 veterans without PTSD were included as controls. After the informed consent, they were investigated by the resting EEG recordings. The results demonstrate that PTSD veterans had decreased alpha power and increased beta power. These results suggest an altered neurobiology in PTSD. Various explanations have been offered for alpha activity decrease observed in PTSD veterans. Increased beta rhythm may play a role as a potential marker in differentiating subtypes of PTSD.

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“…The state of quiet wakefulness is important for human psy choemotional functions. There are several proofs that the functional organization of the cerebral cortex depends not only on the specific conditions of the envi ronment or definite cognitive tasks but also on stable characteristics reflecting specific features inherent in a person that determine the state of the main structures of the brain providing quiet wakefulness [14][15][16][17][18][19].…”

Section: Resultsmentioning

confidence: 99%

Bioelectric brain activity during visual perception of verbalized and nonverbalized stimuli in seven-to eight-year-old schoolchildren

Zvyagina

Sokolova

2013

Hum Physiol

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Neurophysiological mechanisms of visual perception of verbalized and nonverbalized stimuli have been studied in girls (n = 89) and boys (n = 109) aged seven to eight years. It has been shown that, in children of this age, neurophysiological mechanisms of the visual perception system during the selection of verbalized and nonverbalized stimuli have similar organizations of functional rearrangements and are char acterized by the general involvement of cortical areas and by the lack of clear specialization of the cerebral hemispheres. However, the choice of nonverbalized visual stimuli is characterized by a more pronounced gen eralization of the functional interaction between cortical areas and by the increased spectral power of the EEG's high frequency components in anterior associative areas. The increased spatial synchronization in the EEG θ and β bands in the frontal areas emphasizes the contribution of these structures to the analysis and processing of visual stimuli at this stage of development. Differences in the neurophysiological mechanisms of visual perception in boys and girls have been detected. Spatial and temporal organizations of bioelectric activity (BEA) of the brain in girls performing visual tasks is characterized by a stronger and more varied ipsi and contralateral statistical relationships in the fronto occipital direction and displacement of interaction centers to the left hemisphere. In boys perceiving verbalized and nonverbalized visual stimuli, a greater con tribution of posterocentral cortical areas has been observed. The detected differences are considered to reflect a greater maturity of identification mechanisms in girls aged seven to eight years as compared to boys.

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EEG alpha power and alpha power asymmetry in sleep and wakefulness

Cited by 75 publications

References 36 publications

Alpha reactivity to first names differs in subjects with high and low dream recall frequency

Alpha reactivity to first names differs in subjects with high and low dream recall frequency

Quantitative electroencephalogram (qEEG) in combat veterans with post-traumatic stress disorder (PTSD)

Bioelectric brain activity during visual perception of verbalized and nonverbalized stimuli in seven-to eight-year-old schoolchildren

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