Interhemispheric asymmetry of human sleep EEG in response to selective slow-wave sleep deprivation.
Recent evidence suggests that the human sleep electroencephalogram (EEG) shows regional differences over both the sagittal and coronal planes. In the present study, in a group of 10 right-handers, the authors investigated the presence of hemispheric asymmetries in the homeostatic regulation of human sleep EEG power during and after selective slow-wave sleep (SWS) deprivation. The SWS deprivation was slightly more effective over the right hemisphere, but the left hemisphere showed a markedly larger increase of EEG power in the 1.00-24.75 Hz range during recovery-night non-REM sleep, and a larger increase of EEG power during both deprivation-night and recovery-night REM sleep. These results support the greater need for sleep recuperative processes of the left hemisphere, suggesting that local sleep regulation processes may also act during REM sleep.
Ferrara
Michele
M
Dipartimento di Psicologia, Università degli Studi di Roma La Sapienza, Italy. michele.ferrara@uniroma1.it
De Gennaro
Luigi
L
Curcio
Giuseppe
G
Cristiani
Riccardo
R
Bertini
Mario
M
D000328:Adult; D004569:Electroencephalography; D007839:Functional Laterality; D006801:Humans; D008297:Male; D012890:Sleep / Q000502:physiology*; D012892:Sleep Deprivation / Q000473:pathology*