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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Bibliographic Details
Published in:Brain research 1998-08, Vol.801 (1), p.254-258
Main Authors: Sumová, Alena, Trávnı́čková, Zdeňka, Mikkelsen, Jens D, Illnerová, Helena
Format: Article
Language:English
Subjects:
Animals
Biological and medical sciences
c-Fos
Cell Count
Chronobiology
Circadian rhythm
Circadian Rhythm - physiology
Darkness
Dorsomedial part
Fundamental and applied biological sciences. Psychology
Immediate-early gene
Immunohistochemistry
Male
Photic Stimulation
Proto-Oncogene Proteins c-fos - analysis
Proto-Oncogene Proteins c-fos - metabolism
Rats
Rats, Wistar
Spontaneous expression
Suprachiasmatic nucleus
Suprachiasmatic Nucleus - cytology
Suprachiasmatic Nucleus - metabolism
Suprachiasmatic Nucleus - physiology
Vertebrates: anatomy and physiology, studies on body, several organs or systems
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Summary: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