Inter- and intrahemispheric relationships of the EEG activity during sleep in man

Banquet, Jean-Paul

doi:10.1016/0013-4694(83)90146-3

Cited by 34 publications

(7 citation statements)

References 19 publications

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“…Similarly, in recent findings with electrocortical changes during sleep and wakefulness in the cat i77], it was concluded that only sleep, or more specifically SWS (not REM sleep), allows some form of cerebral shutdown, increased thresholds of responsiveness to sensory input, and release from the constraining state of quiet readiness, which is typical of wakefulness. In man, SWS seems to reflect a degree of cerebral shut-down greater than that found in other sleep states, to the extent that the cerebrum appears to be functionally disconnected from subcortical mechanisms [78], with a significant level of isolation between the two hemispheres [79].…”

Section: Discussionmentioning

confidence: 99%

Human Sleep and Tissue Restitution: Some Qualifications and Doubts

Horne

1983

Clinical Science

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Section: Discussionmentioning

confidence: 99%

Human Sleep and Tissue Restitution: Some Qualifications and Doubts

Horne

1983

Clinical Science

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“…During sleep, decreasing pattern of inter-hemispheric coherence from the waking state until sleep stage 4 was observed in all EEG frequency bands, although synchronisation of slow frequency bands was still considerably high (Banquet, 1983). However, there is still some controversy with other studies reporting that inter-hemispheric coherence increases during sleep (Dumermuth et al, 1983;Dumermuth & Lehmann, 1981).…”

Section: Introductionmentioning

confidence: 98%

Inter-hemispheric electroencephalography coherence analysis: Assessing brain activity during monotonous driving

Jap¹,

Lal²,

Fischer³

2010

International Journal of Psychophysiology

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The current study investigated the effect of monotonous driving on inter-hemispheric electroencephalography (EEG) coherence. Twenty-four non-professional drivers were recruited to perform a fatigue instigating monotonous driving task while 30 channels of EEG were simultaneously recorded. The EEG recordings were then divided into 5 equal sections over the entire driving period for analysis. Inter-hemispheric coherence was computed from 5 homologous EEG electrode pairs (FP1-FP2, C3-C4, T7-T8, P7-P8, and O1-O2) for delta, theta, alpha and beta frequency bands. Results showed that frontal and occipital inter-hemispheric coherence values were significantly higher than central, parietal, and temporal sites for all four frequency bands (p<0.0001). In the alpha frequency band, significant difference was found between earlier and later driving sections (p=0.02). The coherence values in all EEG frequency bands were slightly increased at the end of the driving session, except for FP1-FP2 electrode pair, which showed no significant change in coherence in the beta frequency band at the end of the driving session.

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“…The EEG coherence function is one measure which may index activity across the corpus callosum and which has been used to assess brain processes during both waking cognitive tasks [ 1 ] and sleep [2][3][4][5]. However, the assump tion that EEG coherence reflects the underlying activity in the corpus callosum is one which requires further vali dation.…”

Section: Introductionmentioning

confidence: 99%

Decreased Interhemispheric EEG Coherence during Sleep in Agenesis of the Corpus Callosum

Nielsen

Montplaisir²,

Lassonde³

1993

Eur Neurol

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Inter- and intrahemispheric EEG coherence was studied in 4 subjects with agenesis of the corpus callosum (ACC) and in 4 matched controls through different states of the sleep/wakefulness cycle. Interhemispheric coherence was calculated between homologous prefrontal, frontal, central, parietal and occipital electrode pairs whereas intrahemispheric coherence was calculated between all adjacent, unihemispheric electrode pairs. EEG samples were recorded from stage 2, stages 3 + 4 and stage REM sleep and the eyes closed waking state. Interhemispheric coherence measures indicated lower values for ACC subjects than for control subjects for most brain regions; the occipital cortex was least affected. These results further validate the interhemispheric coherence function as a measure of activity in the corpus callosum and suggest that occipital measures may index activity localized in the posterior commissure. Intrahemispheric coherence measures indicated very few differences between the two groups, a result consistent with the suggestion that there is no specialized intrahemispheric compensation in ACC.

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Inter- and intrahemispheric relationships of the EEG activity during sleep in man

Cited by 34 publications

References 19 publications

Human Sleep and Tissue Restitution: Some Qualifications and Doubts

Human Sleep and Tissue Restitution: Some Qualifications and Doubts

Inter-hemispheric electroencephalography coherence analysis: Assessing brain activity during monotonous driving

Decreased Interhemispheric EEG Coherence during Sleep in Agenesis of the Corpus Callosum

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