Recruiting

Bright Light

Sponsor:

VA Palo Alto Health Care System

Code:

NCT01119365

Conditions

Healthy

Eligibility Criteria

Sex: All

Age: 18 - 35

Healthy Volunteers: Accepted

Interventions

Bright light

Study Details

Brief summary:

Light is the primary means by which the internal circadian clock remains aligned ("entrained") with the external world. Misalignment of this internal clock can occur during situations such as shift work and jet travel across multiple time zones (jet lag). The purpose of this study is to examine how sequences of brief flashes of light can affect entrainment of the clock.

Conditions

Healthy

Study ID

NCT01119365

Start date

Jul, 2011

Status verified date

Mar, 2022

Completion date

Jun, 2023

Anticipated

Primary completion date

Jun, 2023

Anticipated

Eligibility Criteria

Eligibility Criteria

Sex: All

Age: 18 - 35

Healthy Volunteers: Accepted

Inclusion Criteria:

  • Good health
  • Normal hearing

Exclusion Criteria:

  • Sleep disorder
  • Extreme chronotype
  • Regular smoker
  • Depression
  • Alcohol abuse
  • Illegal drug use

Study Design

Enrollment

300 participants

Anticipated

Allocation

Randomized

Intervention Model

Single group

Primary purpose

Basic Science

Interventions and Outcome Measures

Arms

experimental: Light

Sequence of bright light flashes of varying durations, interflash intervals, flash lengths, flash brightness, and flash color.

Interventions

Bright light

Light is administered through a custom designed mask with LED lights.

Primary outcome measure

  • Circadian phase [ Time Frame: 2 days ]

Central Contacts and Locations

Central contacts

Marisol Duran

650-493-5000mreinoso@pavir.org

Locations

VA Palo Alto Health Care System

Recruiting

Palo Alto, California, United States, 94304

Principal Investigator:

Jamie M Zeitzer, PhD

More Information

Sponsor

VA Palo Alto Health Care System

Last update posted

Apr 6, 2022

Last verified

Mar, 2022

Keywords

  • Healthy controls

Trial information was received from ClinicalTrials.gov and was last updated on 2026-09-10. This information was provided to ClinicalTrials.gov by VA Palo Alto Health Care System on 2022-04-06.