Researchers from Texas A&M University are conducting a multi-phase project supported by NASA to investigate how differences in gravity influence human coordination and movement control. The study involves Dr. Deanna Kennedy of the Department of Kinesiology and Sport Management, along with Drs. Ana Diaz Artiles and Bonnie Dunbar from the Department of Aerospace Engineering.
The team aims to identify challenges astronauts encounter in space and understand how the human body adapts when environmental surroundings shift. To study these adjustments, researchers evaluated participants performing movement tasks while experiencing changing gravitational conditions during parabolic flight testing. The latest phase utilizes a short-radius human centrifuge capable of recreating lunar and Martian gravity for extended periods.
Participants moved through Earth gravity, partial gravity, and microgravity conditions to observe how coordination adapted. Researchers found that as gravity decreases, movement becomes progressively less stable. Tasks requiring complex coordination, such as engaging each hand to perform different actions independently, became harder to control. Instead of maintaining intended movement patterns, participants gradually shifted toward easier and more natural behaviors.
The findings indicate that gravity acts as a control factor impacting how the brain manages movement. Dr. Kennedy noted that while much coordination research focuses on speed, this work demonstrates that gravity changes movement patterns in a systematic and predictable way.
