Congress hears from astronauts about human spaceflight
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چکیده
منابع مشابه
Reactivation and shedding of cytomegalovirus in astronauts during spaceflight.
The reactivation of cytomegalovirus (CMV) in 71 astronauts was investigated, using polymerase chain reaction. A significantly greater (P<.0001) shedding frequency was found in urine samples from astronauts before spaceflight (10.6%) than in urine from the healthy control subject group (1.2%). Two of 4 astronauts studied during spaceflight shed CMV in urine. A significant increase (P<.0001) in C...
متن کاملSubnormal norepinephrine release relates to presyncope in astronauts after spaceflight.
Postflight orthostatic intolerance is experienced by virtually all astronauts but differs greatly in degree of severity. We studied cardiovascular responses to upright posture in 40 astronauts before and after spaceflights lasting up to 16 days. We separated individuals according to their ability to remain standing without assistance for 10 min on landing day. Astronauts who could not remain st...
متن کاملApplicability of the actigraphy for astronauts in spaceflight
Pandi-Perumal and Gonfalone presented perspective on sleep in space by overviewing the past medical reports [3]. The authors made special emphasis on “normal sleep” in space, where no gravity exists. According to their review, sleep in space was mainly monitored by subjective sleep diaries and actigraphy (wrist-worn accelerometer). As sleep cycle was developed in response to the 24 h rotation o...
متن کاملAdaptation of autonomic heart rate regulation in astronauts after spaceflight
BACKGROUND Spaceflight causes changes in the cardiovascular control system. The aim of this study was to evaluate postflight recovery of linear and nonlinear neural markers of heart rate modulation, with a special focus on day-night variations. MATERIAL/METHODS Twenty-four-hour Holter ECG recordings were obtained in 8 astronauts participating in space missions aboard the International Space S...
متن کاملDistance and Size Perception in Astronauts during Long-Duration Spaceflight
Exposure to microgravity during spaceflight is known to elicit orientation illusions, errors in sensory localization, postural imbalance, changes in vestibulo-spinal and vestibulo-ocular reflexes, and space motion sickness. The objective of this experiment was to investigate whether an alteration in cognitive visual-spatial processing, such as the perception of distance and size of objects, is ...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2011
ISSN: 0096-3941
DOI: 10.1029/2011eo400003