Cited by 119Circadian rhythm and melatoninNonlinear Dynamics and Pattern FormationSleep and Wakefulness Research

Daily and seasonal adaptation of the circadian clock requires plasticity of the SCN neuronal network

Meijer, Johanna H., Michel, Stephan, VanderLeest, Henk T., Rohling, Jos H. T.·2010·European Journal of Neuroscience

Abstract

Circadian rhythms are an essential property of many living organisms, and arise from an internal pacemaker, or clock. In mammals, this clock resides in the suprachiasmatic nucleus (SCN) of the hypothalamus, and generates an intrinsic circadian rhythm that is transmitted to other parts of the CNS. We will review the evidence that basic adaptive functions of the circadian system rely on functional plasticity in the neuronal network organization, and involve a change in phase relation among oscillatory neurons. We will illustrate this for: (i) photic entrainment of the circadian clock to the light–dark cycle; and (ii) seasonal adaptation of the clock to changes in day length. Molecular studies have shown plasticity in the phase relation between the ventral and dorsal SCN during adjustment to a shifted environmental cycle. Seasonal adaptation relies predominantly on plasticity in the phase relation between the rostral and caudal SCN. Electrical activity is integrated in the SCN, and appears to reflect the sum of the differently phased molecular expression patterns. While both photic entrainment and seasonal adaptation arise from a redistribution of SCN oscillatory activity patterns, different neuronal coupling mechanisms are employed, which are reviewed in the present paper.

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Crossref · 10.1111/j.1460-9568.2010.07522.x

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  • Pacemaker cells in the suprachiasmatic nucleus of the hypothalamus are organized in separate networks.

    “Pacemaker cells, which individually generate circadian rhythms in the suprachiasmatic nucleus of the hypothalamus, are organized in separate networks16.”

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Authors
Meijer, J. H., Michel, S., VanderLeest, H. T., & Rohling, J. H. T.
Affiliations
Leiden University Medical Center (NL)
Corresponding author
Meijer, Johanna H.
Venue
European Journal of Neuroscience
Publisher
Wiley
Published
2010-12
Volume
32
Issue
12
Pages
2143-2151
ISSN
  • 0953-816X (ISSN-L)
  • 1460-9568
OpenAlex
W2157329350
Cited by
119
References
106
Citations by year
2026: 6 · 2025: 2 · 2024: 4 · 2023: 11 · 2022: 8 · 2021: 9 · 2020: 4 · 2019: 8 · 2018: 9 · 2017: 6 · 2016: 11 · 2015: 9 · 2014: 8 · 2013: 6 · 2012: 10
FWCI
0.77
Type
journal article
Language
en
Open access
closed
Locations
  • European Journal of Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Data Archiving and Networked Services (DANS) (submittedVersion)
  • Leiden Repository (Leiden University) (submittedVersion)
Funders
European Commission
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Physical Sciences › Computer Science › Computer Networks and Communications › Nonlinear Dynamics and Pattern Formation
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
Keywords
circadian clock, suprachiasmatic nucleus, neuroplasticity, light entrainment, seasonal adaptation, day length, neuronal coupling, circadian rhythm
MeSH terms
Adaptation, Physiological, Animals, Circadian Rhythm, Nerve Net, Neuronal Plasticity, Seasons, Suprachiasmatic Nucleus, Photoperiod, Neurotransmitter Agents, Jet Lag Syndrome, Circadian Clocks

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