1 hemisphere was surgically isolated by combining midline bisection with a rostral hemisection of the brain stem. The EEG records from the isolated hemisphere showed almost continuous synchronization, typical of sleep or coma. However, brief periods of desynchronization up to 20 min. could be brought about by olfactory and nociceptive stimuli. Episodes of a spontaneous form of desynchronization also occurred, mainly during behavioral sleep. Even a small bridge of extrareticular tissue left intact in the brain-stem hemisection served to restore a normal wake-sleep cycle in the isolated hemisphere. (21 ref.) ((c) 1997 APA/PsycINFO, all rights reserved)
Electroencephalographic activity of the isolated hemicerebrum of the cat
BERLUCCHI, Giovanni
1966-01-01
Abstract
1 hemisphere was surgically isolated by combining midline bisection with a rostral hemisection of the brain stem. The EEG records from the isolated hemisphere showed almost continuous synchronization, typical of sleep or coma. However, brief periods of desynchronization up to 20 min. could be brought about by olfactory and nociceptive stimuli. Episodes of a spontaneous form of desynchronization also occurred, mainly during behavioral sleep. Even a small bridge of extrareticular tissue left intact in the brain-stem hemisection served to restore a normal wake-sleep cycle in the isolated hemisphere. (21 ref.) ((c) 1997 APA/PsycINFO, all rights reserved)
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