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

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...

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Veröffentlicht in:Brain research 1998-08, Vol.801 (1), p.254-258
Hauptverfasser: Sumová, Alena, Trávnı́čková, Zdeňka, Mikkelsen, Jens D, Illnerová, Helena
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Sprache:eng
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Zusammenfassung: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.
ISSN:0006-8993
1872-6240
DOI:10.1016/S0006-8993(98)00619-2