Enhancement of potassium ion activity in cat hippocampus during REM sleep.
During slow-wave sleep, extracellular potassium ion activity in the dorsal hippocampus of the cat was comparable to that during quiet wakefulness. During rapid eye movement (REM) sleep, it showed a gradual increase by 0.2-0.3 mM in the CA1 pyramidal layer and its close vicinity. No phasic increase was observed when REM bursts occurred. The enhanced K+ activity during REM sleep is considered to reflect the overall activity of the neurons in the pyramidal layer.
Satoh
T
T
Department of Physiology, Aichi-Gakuin University Dental School, Nagoya, Japan.
Yokota
T
T
Kitayama
S
S
D000818:Animals; D002415:Cats; D004569:Electroencephalography; D005071:Evoked Potentials / Q000502:physiology; D006624:Hippocampus / Q000502:physiology*; D009474:Neurons / Q000502:physiology; D011188:Potassium / Q000502:physiology*; D015221:Potassium Channels / Q000502:physiology*; D012894:Sleep Stages / Q000502:physiology; D012895:Sleep, REM / Q000502:physiology*; D014851:Wakefulness / Q000502:physiology
D015221:Potassium Channels; D011188:Potassium