NEOCORTICAL AND HIPPOCAMPAL ELECTRICAL-ACTIVITIES ARE SIMILAR IN SPONTANEOUS AND CHOLINERGIC-INDUCED REM-SLEEP

Neocortical and hippocampal EEG power spectra obtained during REM-like . sleep induced by unilateral carbachol microinjections (0.01 M, 0.02 M and 0.2 M; volume 20 nl) into the ventral part of the nucleus reticu laris pontis oralis have been compared with EEG power spectra obtained during spontaneous REM sleep. Our findings indicate that neocortical and hippocampal electrical activities during the REM-like state genera ted by carbachol delivery in this pontine region mimic those present i n spontaneous REM sleep. (C) 1997 Elsevier Science B.V.