The relation between light-induced discharge in the suprachiasmatic nucleus and phase shifts of hamster circadian rhythms

Johanna H. Meijer; Benjamin Rusak; Gabriëlla Gänshirt

doi:10.1016/0006-8993(92)90191-B

The relation between light-induced discharge in the suprachiasmatic nucleus and phase shifts of hamster circadian rhythms

Johanna H. Meijer, Benjamin Rusak, Gabriëlla Gänshirt

Medicine

Medicine

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Abstract

The role of neurophysiological activation of suprachiasmatic nucleus (SCN) cells in phase shifting the circadian pacemaker of the hamster was investigated in a combined behavioural and electrophysiological study. An electrophysiological study examined the relation between the pattern of light presentation and the induced discharge rate in the SCN. Behavioural experiments examined between the pattern of light presentation and the magnitude of phase shift induced. The combination of these results provides an indirect assay of the relations between induced neural discharge in the SCN and phase shifts of the circadian activity rhythm. The data indicate that the magnitude of phase shifts is monotonically, but not linearly, related to photically induced changes in discharge rate.

Original language	English
Pages (from-to)	257-263
Number of pages	7
Journal	Brain Research
Volume	598
Issue number	1-2
DOIs	https://doi.org/10.1016/0006-8993(92)90191-B
Publication status	Published - Dec 11 1992

ASJC Scopus Subject Areas

General Neuroscience
Molecular Biology
Clinical Neurology
Developmental Biology

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abstract = "The role of neurophysiological activation of suprachiasmatic nucleus (SCN) cells in phase shifting the circadian pacemaker of the hamster was investigated in a combined behavioural and electrophysiological study. An electrophysiological study examined the relation between the pattern of light presentation and the induced discharge rate in the SCN. Behavioural experiments examined between the pattern of light presentation and the magnitude of phase shift induced. The combination of these results provides an indirect assay of the relations between induced neural discharge in the SCN and phase shifts of the circadian activity rhythm. The data indicate that the magnitude of phase shifts is monotonically, but not linearly, related to photically induced changes in discharge rate.",

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Y1 - 1992/12/11

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AB - The role of neurophysiological activation of suprachiasmatic nucleus (SCN) cells in phase shifting the circadian pacemaker of the hamster was investigated in a combined behavioural and electrophysiological study. An electrophysiological study examined the relation between the pattern of light presentation and the induced discharge rate in the SCN. Behavioural experiments examined between the pattern of light presentation and the magnitude of phase shift induced. The combination of these results provides an indirect assay of the relations between induced neural discharge in the SCN and phase shifts of the circadian activity rhythm. The data indicate that the magnitude of phase shifts is monotonically, but not linearly, related to photically induced changes in discharge rate.

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The relation between light-induced discharge in the suprachiasmatic nucleus and phase shifts of hamster circadian rhythms

Abstract

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