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Examination of the effects of sleep fragmentation on autonomic nervous system function

Examination of the effects of sleep fragmentation on autonomic nervous system function - Fragmented sleep and Autonomic Nervous System study (FANS-study)

Status
Recruiting
Phases
Unknown
Study type
Interventional
Source
JPRN
Registry ID
JPRN-UMIN000059527
Enrollment
30
Registered
2025-11-10
Start date
2025-11-10
Completion date
Unknown
Last updated
2026-06-29

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Healthy individuals

Interventions

In Group 1, the first intervention is conducted under the sleep fragmentation condition, forced awakening approximately every hour for 3-5 minutes during nighttime sleep. An interval of at least 7 day

Sponsors

National Center of Neurology and Psychiatry
Lead Sponsor

Eligibility

Sex/Gender
All

Inclusion criteria

Inclusion criteria: 1)Female participants who regularly monitor their menstrual cycle and are available during the follicular phase 2)Individuals from whom written informed consent can be obtained

Exclusion criteria

Exclusion criteria: 1)Individuals with conditions likely to be exacerbated by experimental stressors, including insomnia (self-reported) 2)Individuals with arrhythmia, pacemaker implantation, or heart disease 3)Individuals taking medications that affect the autonomic nervous system function (such as beta-blockers, antidepressants, or steroids) 4)Individuals taking sleeping pills or other medications that affect sleep 5)Individuals deemed unsuitable at the discretion of the principal investigator

Design outcomes

Primary

MeasureTime frame
Heart rate variability

Secondary

MeasureTime frame
Other autonomic nervous system functions, as well as attention, cognitive, and emotional functions, the endocrine system, and the inflammatory response.

Countries

Japan

Contacts

Public ContactKentaro Nagao

National Institute of Mental Health, National Center of Neurology and Psychiatry Department of Sleep-Wake Disorders

knagao@ncnp.go.jp042-346-2014

Outcome results

None listed

Source: JPRN (via WHO ICTRP) · Data processed: Jul 3, 2026