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Partial Oxygen Pressure in the Somatosensory Cortex of Monkeys in Spaceflight (B11-27)
Principal Investigator
Research Area:
Species Studied
Scientific Name: Macaca mulatta Species: Monkey Strain: Rhesus


During microgravity exposure, body fluids shift towards the head. This fluid shift may affect cerebral circulation, causing venous congestion. Theory has predicted that this may decrease oxygen supply to the brain, causing hypoxemia. Few experiments have actually measured oxygen tension (pO2) - a measurement of regional circulation and oxygen supply - in space. One study performed on the skin of cosmonauts during initial exposure to microgravity showed a decrease in both pO2 and oxygen uptake. In contrast, previous studies of pO2 in the brain of primates during space flight did not show any significant changes in pO2. This experiment will continue the study of pO2 in the primate brain during space flight.

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Krotov, V.P. and A.M. Nosovsky: Oxygen Tension in the Somatosensory Cortex of Rhesus Monkeys in Space. Journal of Gravitational Physiology, vol. 7(1), Jan 2000, pp. S125-S127.

Data Information
Data Availability
Archive is complete. No data sets are available for this experiment. Please Contact LSDA if you know of available data for this investigation.

Respiration, Oxygen tension. primate. somatosensory cortex, Platinum electrodes, continuous/intermittent recording
Respiration, Oxygen uptake. primate. somatosensory cortex, Platinum electrodes, continuous/intermittent recording

Mission/Study Information
Mission Launch/Start Date Landing/End Date Duration
Bion 11 12/24/1996 01/07/1997 13.5 days

Additional Information
Managing NASA Center
Ames Research Center (ARC)
Responsible NASA Representative
Ames Research Center LSDA Level 3
Project Manager: Martha Del Alto
Institutional Support
National Aeronautics and Space Administration (NASA)
Protocol / Approach
Proposal Date
Proposal Source