Postoperative changes of rat EEG variance.
Concerning an EEG parameter variance, the long-term postoperative changes were observed in rats chronically implanted with bipolar depth electrodes for EEG recordings. The cortico-hippocampal EEG signals were continuously digitized and their variances were computed for each 1 min in real time. Daily mean of the EEG variance gradually increased over 2 weeks after surgery for the implantation of chronic electrodes and, then, reached a plateau. To observe the absolute quantity of the depth EEG in the rat, at least 2 weeks are required before data collections.
Sei
H
H
Department of Physiology, School of Medicine, University of Tokushima, Japan.
Sano
A
A
Seno
H
H
Morita
Y
Y
D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology; D004567:Electrodes, Implanted; D004569:Electroencephalography / Q000295:instrumentation*; D006624:Hippocampus / Q000502:physiology; D006706:Homeostasis / Q000502:physiology*; D008297:Male; D011184:Postoperative Period; D051381:Rats; D017208:Rats, Wistar; D012815:Signal Processing, Computer-Assisted; D012894:Sleep Stages / Q000502:physiology*; D014851:Wakefulness / Q000502:physiology*