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What is the Fatigue Countermeasures Lab?


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View of Japan Aerospace Exploration Agency (JAXA) Koichi Wakata, Expedition 38 Flight Engineer, strapped into his sleeping bag

View of Japan Aerospace Exploration Agency's (JAXA) Koichi Wakata, Expedition 38 Flight Engineer, strapped into his sleeping bag in his sleep station located in the Node 2.

Credits: NASA



For many of us, it’s OK to feel a little sleepy at your desk after lunch. But for people with jobs where it’s critical to be alert and able to think quickly and clearly, feeling fatigued from sleep loss, jet lag, shift work or waking up groggy can be a problem.


The Fatigue Countermeasures Lab at NASA’s Ames Research Center, in California’s Silicon Valley, studies the way fatigue affects people with complex tasks to perform. The realms for these tasks can be as diverse as aviation and spaceflight, NASA space mission operations, military settings and operating self-driving cars.


In aviation, pilots face the challenges of early rises, long shifts and jet lag on the job. The lab studies ways to optimize their schedules to minimize these effects. In space, how sleep might be different away from Earth is an area of ongoing study, and the Fatigue Countermeasures Lab works closely with NASA’s astronaut program. For these primary areas of the FCL’s research, the process is the same: test solutions in the lab and then put them to use in the aviation or spaceflight environment. If this field testing reveals new problems, the team goes back to the lab to refine the approach.


By learning how sleep and its bedfellows interact – that includes alertness and circadian phase, or where you fall in your usual sleep/wake cycle at a given moment – the FCL team can explore solutions to help people manage fatigue and do their jobs safely.


Aviation Studies


Work Start Time and Pilot Performance


In a study with a short-haul airline, the Fatigue Countermeasures Lab investigated how starting work early or ending work late affects performance. They found that pilots get less sleep and feel sleepier when they have to start work early in the morning compared to later in the day. The lab is now working to see if providing pilots with bright light in the morning, to mimic sunrise, will help them get more sleep and perform better when they must get up early.


Optimal Timing for Pilots to Rest


In a joint study with American Airlines, Washington State University and United Airlines, the FCL is working on determining the optimal time for pilots to rest during long-haul flights. On flights of 10 to 15 hours, pilots take turns sleeping in a bunk, and this work is looking at the best way to time those rest breaks for pilots who will handle the task of landing, ensuring they feel rested and alert.


A woman in a white labcoat stands in a lab holding a cap covered in electrodes

Erin Flynn-Evans, a research psychologist and director of the Fatigue Countermeasures Laboratory at NASA's Ames Research Center, holds a cap that measures brain wave activity. Her team uses the cap as one tool in its studies of the way fatigue affects people on the job in diverse fields such as aviation, spaceflight and NASA mission operations.

Credits: NASA/Ames Research Center/Dominic Hart


NASA Operations Work


A NASA mission to space can mean a lot of work back here on Earth. The Fatigue Countermeasures Lab recently worked with the team sending NASA’s VIPER rover to explore the Moon’s south pole as part of the Artemis program. The goal was to determine how long the drivers on this planet will be able to maneuver the rover before needing a break.


Rover controllers completed a simulated lunar drive for five hours during the day and for five hours at night. The researchers are now analyzing the data to recommend ways to schedule the drivers and their tasks.


Two pilots in the cockpit of a flight simulator

Two pilots in the cockpit of a flight simulator at the Crew-Vehicle Systems Research Facility at NASA's Ames Research Center in California's Silicon Valley. The Fatigue Countermeasures Lab studies ways to optimize pilot schedules to minimize the effects of fatigue.

Credits: NASA/Ames Research Center/Dominic Hart


Studies in the Lab


Self-driving Cars


The team at the Fatigue Countermeasures Lab studied what happens regarding individuals’ alertness when they supervise self-driving cars, compared to manually driving themselves. Understanding how the brain and body respond when vehicles are on autopilot could ultimately help with the design of safety alerts in these cars. But the FCL researchers can also take what they learn from drivers – who are far more numerous than pilots – and apply that to the aviation world. More sophisticated automated controls may be proposed for planes, and the lab will be able to study how pilots interact with them in a targeted way.


Eye Movement as a Window to the Brain


In collaboration with colleagues at NASA Ames, the FCL has evaluated how eye movements change during sleep deprivation, following caffeine intake during the night, during chronic sleep restriction (five hours per night for a week) and following sleep inertia, the grogginess that you feel upon waking. The specific results are now being analyzed, but the team has found the eyes can show what’s happening in the brain and help reveal when someone is compromised by fatigue, even if they can’t recognize it themselves.


Sleep Inertia


The grogginess we often feel in the morning is a major challenge for spaceflight, aviation and military settings, where people need to perform at a high level upon waking. This is called sleep inertia and the FCL studied ways to overcome it, including exposure to special lights and breathing in a specific scent. The results are now being analyzed.



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