Spaceflight results in depressed cancellous bone formation in rat humeri.


Two experiments investigating the effects of short-term spaceflight on cancellous bone turnover were carried out: Physiological Systems Experiment-1 (PSE-1) (a 4-d orbital spaceflight) and PSE-2 (a 10-d flight). Cancellous bone area was not significantly altered by spaceflight in the humerus during either flight. The calculated bone formation rate was… (More)