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Autonomic arousals contribute to brain fluid pulsations during sleep
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Abstract
During sleep, slow waves of neuro-electrical activity engulf the human brain and aid in the consolidation of memories. Recent research suggests that these slow waves may also promote brain health by facilitating the removal of metabolic waste, possibly by orchestrating the pulsatile flow of cerebrospinal fluid (CSF) through local neural control over vascular tone. To investigate the role of slow waves in the generation of CSF pulsations, we analyzed functional MRI data obtained across the full sleep-wake cycle and during a waking respiratory task. This revealed a novel generating mechanism that relies on the autonomic regulation of cerebral vascular tone without requiring slow electrocortical activity or even sleep. Therefore, the role of CSF pulsations in brain waste clearance may, in part, depend on proper autoregulatory control of cerebral blood flow.
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The anti-correlated nature of blood and CSF is not likely to be the result of hemoglobin absorption.
“Likewise, the anti-correlated nature of blood and CSF is not likely to be the result of hemoglobin absorption”
From Norepinephrine-mediated slow vasomotion drives glymphatic clearance during sleep (2025) · cites this paper as [42]
The Results section reports a negative correlation between the fMRI global-signal derivative and the CSF signal, interpreting it as consistent with decreased cerebral blood volume causing CSF inflow. Materials and Methods explains the CSF signal through MRI inflow sensitivity. Neither passage evaluates or explicitly rules out hemoglobin absorption as the cause of the anti-correlation. (LLM, conf=0.78)
Experimental — accuracy not yet measuredA slightly faster 0.05 Hz oscillation in CSF flow was observed in the 4th ventricle of human subjects while sleeping in an MR scanner and was temporally directly correlated with autonomic arousals.
“a slightly faster 0.05 Hz oscillation in CSF flow was observed in the 4th ventricle of human subjects while sleeping in an MR scanner17 and was temporally directly correlated with autonomic arousals42.”
From Norepinephrine-mediated slow vasomotion drives glymphatic clearance during sleep (2025) · cites this paper as [42]
The anti-correlated nature of blood and CSF has been established with MR imaging.
“this relationship has been established with MR imaging17,42.”
From Norepinephrine-mediated slow vasomotion drives glymphatic clearance during sleep (2025) · cites this paper as [42]
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Metadata
- Authors
- Picchioni, D., Özbay, P. S., Mandelkow, H., de Zwart, J. A., Wang, Y., van Gelderen, P., & Duyn, J. H.
- Affiliations
- National Institutes of Health (US)
- Corresponding author
- Duyn, Jeff H.
- ORCID
- Venue
- NeuroImage
- Publisher
- Elsevier BV
- Published
- 2022-04
- Volume
- 249
- Pages
- 118888
- ISSN
- 1053-8119 (ISSN-L)
- PMC
- PMC11395500
- OpenAlex
- W4221070906
- Cited by
- 104
- References
- 12
- Citations by year
- 2026: 26 · 2025: 36 · 2024: 18 · 2023: 17 · 2022: 6
- FWCI
- 10.68
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- NeuroImage (publishedVersion, cc-by-nc-nd)
- bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, public-domain)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Funders
- National Institute of Neurological Disorders and Stroke
- National Institutes of Health
- Topics
- Health Sciences › Medicine › Clinical Neurology › Cerebrospinal fluid and hydrocephalus
- Life Sciences › Neuroscience › Cognitive Neuroscience › Sleep and Wakefulness Research
- Health Sciences › Medicine › Clinical Neurology › Traumatic Brain Injury and Neurovascular Disturbances
- Keywords
- cerebrospinal fluid pulsation, autonomic arousal, slow waves, sleep, cerebrovascular tone, autoregulation, cerebral blood flow, brain waste clearance, sleep-wake cycle, respiratory arousals
- MeSH terms
- Adult, Arousal, Autonomic Nervous System, Cerebrospinal Fluid, Humans, Magnetic Resonance Imaging, Pulsatile Flow, Sleep Stages, Brain Waves
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