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Neurology. 2002 Oct 22;59(8):1272-4.

Ultradian sleep-cycle variation of serotonin in the human lateral ventricle.

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  • 1Department of Neurology, David Geffen School of Medicine, UCLA, Los Angeles, CA 90095, USA.


Serotonin is thought to be intimately involved in the regulation of sleep and waking in humans, though the evidence for such is indirect. Using in vivo microdialysis, the authors show that serotonin in human ventricular CSF covaries with the state of consciousness. They hypothesize that CSF serotonin may be acting in an endocrine-like manner through activation of known leptomeningeal serotonin receptors and possibly participating in modulation of choroidal production of CSF.

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