Cited by 633Circadian rhythm and melatoninSleep and Wakefulness ResearchNeuroscience of respiration and sleep

A neural circuit for circadian regulation of arousal

Aston-Jones, Gary, Chen, Sheng, Zhu, Yan, Oshinsky, Michael L.·2001·Nature Neuroscience

Abstract

An unknown aspect of behavioral state regulation is how the circadian oscillator of the suprachiasmatic nucleus (SCN) regulates sleep and waking. In this report, we describe the necessary elements for a circuit that provides circadian regulation of arousal. Trans-synaptic retrograde tracing revealed a prominent indirect projection from the SCN to the noradrenergic nucleus locus coeruleus (LC), a brain arousal system. Double-labeling experiments revealed several possible links between the SCN and the LC, including the dorsomedial (DMH) and paraventricular hypothalamic nuclei (PVN), as well as medial and ventrolateral pre-optic areas. Lesion studies confirmed that the DMH is a substantial relay in this circuit. Next, neurophysiology experiments revealed circadian variations in LC impulse activity. Lesions of the DMH eliminated these circadian changes in LC activity, confirming the functionality of the SCN-DMH-LC circuit. These results reveal mechanisms for regulation of circadian and sleep-waking functions.

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Crossref · 10.1038/89522

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  • Sympathovagal balance is lowest during REM sleep, when the locus coeruleus, the main brain source of catecholamine biosynthesis, is silent.

    “Sympathovagal balance is lowest during REM sleep, when the locus coeruleus, the main brain source of catecholamine biosynthesis, is silent.71”
  • Projections from the suprachiasmatic nucleus to the locus coeruleus are important for transitions from focused attention to behavioral flexibility.

    “and are important for transitions from focused attention to behavioral flexibility (Aston-Jones et al., 2001)”
  • Projections from the suprachiasmatic nucleus to the locus coeruleus facilitate circadian regulation of noradrenergic activity.

    “For example, projections from the SCN to the locus coeruleus (LC) facilitate circadian regulation of noradrenergic activity”
  • The neuroanatomical circuit mediating circadian regulation of arousal is a multisynaptic pathway between the suprachiasmatic nucleus and the noradrenergic neurons of the locus coeruleus.

    “The neuroanatomical circuit mediating circadian regulation of arousal is a multisynaptic pathway between the SCN and the noradrenergic neurons of the LC (Aston-Jones et al., 2001; Deurveilher and Semba, 2005).”
  • Lesions of the dorsomedial hypothalamus eliminate the circadian rhythm in locus coeruleus neuronal activity, whereas lesions of the locus coeruleus decrease the amplitude of circadian rhythms of slow-wave activity in the cortex.

    “The functional importance of this circuit was demonstrated by the findings that lesions of the DMH eliminate the circadian rhythm in LC neuronal activity, whereas lesions of the LC decrease the amplitude of circadian rhythms of slow-wave activity in the cortex (Aston-Jones et al., 2001).”

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Authors
Aston-Jones, G., Chen, S., Zhu, Y., & Oshinsky, M. L.
Affiliations
  • Long Island Jewish Medical Center (US)
  • University of Pennsylvania (US)
  • Thomas Jefferson University (US)
Venue
Nature Neuroscience
Published
2001-07
Volume
4
Issue
7
Pages
732-738
ISSN
  • 1097-6256 (ISSN-L)
  • 1546-1726
OpenAlex
W1488974332
Cited by
632
References
51
Citations by year
2026: 16 · 2025: 24 · 2024: 19 · 2023: 23 · 2022: 14 · 2021: 20 · 2020: 23 · 2019: 16 · 2018: 38 · 2017: 21 · 2016: 31 · 2015: 23 · 2014: 23 · 2013: 22 · 2012: 35
FWCI
9.36
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Neuroscience (publishedVersion)
  • PubMed (publishedVersion)
  • Rutgers University Community Repository (Rutgers University) (submittedVersion)
Funders
National Institute of Neurological Disorders and Stroke (R01NS024698, NS 24698)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Neuroscience of respiration and sleep
Keywords
circadian rhythm, arousal, suprachiasmatic nucleus, locus coeruleus, noradrenergic system, dorsomedial hypothalamus, paraventricular nucleus, preoptic area, sleep-wake regulation, circadian oscillations, neural circuits, retrograde tracing
MeSH terms
Animals, Arousal, Circadian Rhythm, Electrophysiology, Hypothalamus, Immunohistochemistry, Locus Coeruleus, Male, Microinjections, Microscopy, Fluorescence, Herpesvirus 1, Suid, Suprachiasmatic Nucleus, Rats, Sprague-Dawley, Rats

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