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Neural circuitry of the suprachiasmatic nucleus and retrochiasmatic area regulating arousal
  • Chang-Rui Chen,
  • Jun Lu
Chang-Rui Chen
Fudan University School of Basic Medical Sciences
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Jun Lu
Harvard Medical School

Corresponding Author:[email protected]

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The suprachiasmatic nucleus (SCN) and retrochiasmatic area (RCA) innervate the paraventricular nucleus of hypothalamus (PVH) that projects to the brainstem arousal parabrachial nucleus (PB), suggesting that SCN and RCA may regulate arousal, independent from the circadian control circuit of arousal. To test the hypothesis, we used DREADDs (Designer Receptors Exclusively Activated by Designer Drugs) to activate these regions, and examine wakefulness. We found that chemo-stimulation of the PVH, SCN, RCA, and PVH-PB pathway all significantly promoted wakefulness, indicating that the SCN-RCA-PVH-PB circuit plays an important role in SCN promoting arousal.
04 Sep 2023Submitted to European Journal of Neuroscience
05 Sep 2023Assigned to Editor
05 Sep 2023Submission Checks Completed
05 Sep 2023Review(s) Completed, Editorial Evaluation Pending
12 Sep 2023Reviewer(s) Assigned