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Losing sleep may shrink brain blood Flow—Especially in men
NCT ID NCT05920759
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looked at how a night of restricted sleep changes blood flow to the brain in healthy adults. Sixteen men and women had their brain blood flow measured after normal sleep and after limited sleep. Researchers wanted to see if the effect was stronger in men. The goal was to better understand how sleep loss might affect brain health differently by sex.
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Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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16 people
The number who actually took part.
- Started
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Oct 2023
- Finished
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Sep 2025
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 45 years
- Sex
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Anyone
- Healthy volunteers
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Accepted
You do not need to have the condition being studied to take part.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Healthy adult men and women, 18-45 years of age, BMI 18-30 kg/m2, non-pregnant, non-breastfeeding, and non-nicotine users Exclusion Criteria: * any medications known to affect sleep, autonomic, metabolic, or cardiovascular health, have a self-reported history of hepatic, renal, pulmonary, cardiovascular, or neurological disease, stroke or neurovascular disease, bleeding/clotting disorders, sleep apnea or other sleep disorders, diabetes, history of alcoholism or substance abuse, major cardiovascular event or surgical procedure within the past three months, or hypertension
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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University of Missouri
Columbia, Missouri, 65211, United States
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