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Spontaneous rhythm in c-Fos immunoreactivity in the dorsomedial part of the rat suprachiasmatic nucleus

Authors
Journal
Brain Research
0006-8993
Publisher
Elsevier
Publication Date
Volume
801
Identifiers
DOI: 10.1016/s0006-8993(98)00619-2
Keywords
  • Suprachiasmatic Nucleus
  • Dorsomedial Part
  • Circadian Rhythm
  • Immediate-Early Gene
  • C-Fos
  • Spontaneous Expression

Abstract

Abstract In rats maintained for 2 days in constant darkness, the suprachiasmatic nucleus exhibited a circadian rhythm in c-Fos immunoreactivity, with the maximum in the morning and trough during the subjective night. In contrast to the night-time photic c-Fos induction occurring in the ventrolateral part of the nucleus, the spontaneous rhythmic c-Fos induction in darkness occurred in the dorsomedial part and might indicate an elevated dorsomedial neuronal activity in the early subjective day.

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