Implicit mood changes according to the degree of sleep pressure between the chronotypes.

Implicit mood changes according to the degree of sleep pressure between the chronotypes. - Implicit mood changes according to chronotype

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000034415

Enrollment

Registered

2019-06-18

Start date

2018-10-09

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

Observational study with minimal intervention.

Interventions

None listed

Eligibility

Sex/Gender

Male

Inclusion criteria

Inclusion criteria: healthy male adult

Exclusion criteria

Exclusion criteria: history of major psychiatric illness including schizophrenia, bipolar disorder, mood disorder, and anxiety disorder. history of major head trauma. history of alcohol and substance use disorder.

Design outcomes

Primary

Measure	Time frame
implicit mood	—

Secondary

Measure	Time frame
core body temperature, melatonin level, polysomnography, sleepiness scale, CES-D, subjective mood scale, Karolinska drowsiness scale, psychomotor vigilance test	—

Countries

Japan

Contacts

Public ContactShingo Kitamura

National Center of Neurology and Psychiatry Department of Sleep-Wake Disorders

s-kita@ncnp.go.jp042-346-2014

Outcome results