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American astronaut Marsha Ivins demonstrates the effects of microgravity on her hair in space. The effects of spaceflight on the human body are complex and largely harmful over both short and long term. [1] Significant adverse effects of long-term weightlessness include muscle atrophy and deterioration of the skeleton (spaceflight osteopenia). [2]
Space adaptation syndrome; NASA astronauts acclimating themselves to space adaptation syndrome in a KC-135 airplane that flies parabolic arcs to create short periods of weightlessness. [1] In about two thirds of the passengers, these flights produce nausea, [2] [3] giving the plane its nickname "vomit comet". Specialty: Space medicine Prevalence
For organ dose calculations, NASA uses the model of Billings et al. [23] to represent the self-shielding of the human body in a water-equivalent mass approximation. Consideration of the orientation of the human body relative to vehicle shielding should be made if it is known, especially for SPEs [24]
The responses of the human body to microgravity exposure during spaceflight involve adaptations at numerous levels. It is believed that skeletal muscle adaptations to microgravity, which affect both muscle mass and function, involve structural alterations in the neural as well as the myofibrillar components of skeletal muscle.
Psychological and sociological effects of space flight are important to understanding how to successfully achieve the goals of long-duration expeditionary missions. Although robotic spacecraft have landed on Mars , plans have also been discussed for a human expedition , perhaps in the 2030s, [ 1 ] for a return mission.
The goal of space radiation research is to estimate and reduce uncertainties in risk projection models and, if necessary, develop countermeasures and technologies to monitor and treat adverse outcomes to human health and performance that are relevant to space radiation for short-term and career exposures, including acute or late CNS effects ...
The pioneering astronauts of the Polaris Dawn mission have a packed agenda during their five short days in space, but medical officer Anna Menon still found time to read to her children from orbit ...
For NASA, specific provisions and requirements for medical services during space missions are outlined in NPD 8900.5B NASA Health and Medical Policy for Human Space Exploration, NPD 8900.1G Medical Operations Responsibilities in Support of Human Space Flight Programs and NASA-STD-3001 NASA Spaceflight Human Systems Standard - Volume 1, Crew Health.
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