Task Ultra-Short Light Pulses as Efficient Countermeasures for Circadian Misalignment and Objective Performance and Subjective Alertness Decrements (Completed)
Last Published:  07/29/22 01:33:24 PM (Central)
Short Title: Light Pulse CM
Responsible HRP Element: Human Factors and Behavioral Performance
Collaborating Org(s):
National Space Biomedical Research Institute (NSBRI)
Funding Status: Completed - Task completed and produced a deliverable
Procurement Mechanism(s):

 SA1) test the hypotheses that deployment of the Dynamic Lighting Schedule using high color temperature intermittent light; (1) will significantly increase the rate of circadian adaptation per minute of light exposure, as measured using Dim Light Melatonin Onset before and after the shift, and (2) will significantly improve cognitive performance, subjective alertness and objective EEG correlates of alertness (suppression of EEG-derived delta-theta activity [0.5-5.5 Hz]) and enhancement of EEG-derived high-alpha activity [10.5-12 Hz]) per minute of light exposure as compared to continuous light during the most efficient schedule (gradual or acute shift of the sleep-wake cycle) determined by a separately funded NSBRI research grant.

SA2) amend their mathematical model of the effects of light on the human circadian pacemaker and the linked model of the effects of length of time awake and circadian phase on performance and alertness to include results using the new ISS lighting: circadian phase-shifting, wavelength-specific, and direct alerting effects.
Resources (None Listed)