Scientists probe brain waves to unlock secrets of natural short sleepers
NCT ID NCT07584538
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study will monitor 75 adults—natural short sleepers, normal sleepers, and people with idiopathic hypersomnia—over 32 continuous hours in a sleep lab. Using EEG and actigraphy, researchers will track brain wave patterns and blood sugar changes to understand how the body regulates sleep. The goal is to uncover biological differences between these sleep types, which may lead to better understanding of sleep disorders.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this study could help explain why some people naturally sleep less without feeling tired, potentially guiding future sleep therapies.
- What could go wrong
- This is an observational study with no treatment, so it won't directly change patient care. Results may not apply to everyone due to the small sample size.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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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About 75 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Apr 2026
An estimate. Start dates often move.
- Expected to finish
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Apr 2028
An estimate. End dates often move.
- 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 years and older
- 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: * Be aged ≥ 18 years * Be affiliated with a social security system * Be able to understand the nature, purpose, and methodology of the study and agree to cooperate during clinical and polysomnographic assessments * Be fluent in French (speaking and writing) * Have provided written informed consent * Sleep duration: * Short sleepers: Weekday sleep duration ≤ 6 hours, with no significant increase at the weekend (weekend sleep duration ≤ 7 hours) and no complaints of daytime sleepiness (ESS \<10). -Normal sleepers: Weekday sleep duration of between 7 and 8 hours, with weekend sleep duration generally similar or slightly longer (between 7 and 9 hours), reflecting a normal sleep duration without restriction or significant catch-up sleep, and with no complaints of daytime sleepiness (ESS \<10). -HI subjects, with increased sleep duration: Increased sleep need, with a reported sleep duration of ≥ 10 hours per night and \> 11 hours over a 24-hour period; increased sleep duration associated with excessive daytime sleepiness not explained by another sleep disorder. * No other sleep disorders * Apnoea-hypopnoea index (AHI) ≤ 15/h * Periodic limb movement index ≤ 15/h Exclusion Criteria: * Pre-existing sleep disorders * Use of medication that affects sleep (such as sedatives, antidepressants, and insomnia medication); * Use of substances that disrupt sleep or reduce fatigue * Serious psychiatric disorders * Pregnancy or breastfeeding * Persons deprived of their liberty (by court order or administrative decision)
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Gui de Chauliac - CHU Montpellier
Montpellier, 34000, France
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