Regularly firing neurones in the rat suprachiasmatic nucleus.
The spontaneous discharge of some suprachiasmatic neurones in vivo and in vitro was found to exhibit a very constant interspike interval. In vivo these cells were comparatively rare and appeared to be mutually coupled. The findings are discussed in relation to coupled oscillator theories of circadian rhythm generation.
D000818:Animals; D002940:Circadian Rhythm; D004553:Electric Conductivity; D007031:Hypothalamus / Q000502:physiology*; D066298:In Vitro Techniques; D009474:Neurons / Q000502:physiology*; D051381:Rats; D013495:Supraoptic Nucleus / Q000502:physiology*