
Predicting the effects of spaceflight on the human body can be very
challenging. Humans have not spent enough time in reduced gravity
to accurately determine the risk of health problems for future exploration
missions.
As NASA plans for longer, more physically demanding missions,
mission planners need to better understand how human physiology
is altered during spaceflight to establish health and safety
requirements for these new missions. NASA’s Glenn Research
Center is leading the development of the Digital Astronaut Project
to better determine physiological changes due to space flight
and how these changes affect the risk of exploration missions.
Glenn was selected to lead this project because of the center’s
longstanding expertise in creating finite element and fluids structure
interaction simulations. The project team at Glenn has partnered with
Johnson Space Center and the University of Mississippi Medical Center
in this effort.
As part of the Human Research Program, the Digital Astronaut will eventually
become a detailed computer model of the entire human body that can be
used to predict the effects of spaceflight on each body system. All
body systems, such as the cardiovascular and vestibular systems, will
be simulated at the level of detail required to understand the effects
of spaceflight. Glenn has already started developing detailed models
of bone loss and kidney stone formation that will be included as part
of the Digital Astronaut.
As an ongoing part of these simulations, the Digital Astronaut
will reflect the effects of reduced gravity so the body’s
reaction to spaceflight can be determined. Then, health problems
can be studied to see how the body would respond in a reduced
gravity environment.
Glenn’s efforts in developing the Digital Astronaut will
help determine the safety of astronauts during future missions
to the moon and Mars. The computer model of the human body will
also be useful to the medical community because it will aid in
understanding disease, perhaps leading to improvements in pharmaceuticals,
surgical procedures and treatments. The Digital Astronaut may
also become a beneficial teaching aid in medical schools.
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M-Mode
ultrasound image of cardiac tissue. |
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Computational
representation of cardiac tissue corresponding to the
ultrasound image. |
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Three-dimensional
model of the human heart. |
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Polarized
light image of human aortic valve leaflet. |
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Computational
representation of aortic valve. |
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