Oct 20 1998
From The Space Library
NASA officials announced that U.S. Senator John H. Glenn Jr. would not participate in the melatonin portion of a sleep study planned for the upcoming Shuttle mission. The study's principal investigator, Charles A. Czeisler of Brigham and Women's Hospital in Boston said that Glenn had failed to meet one of the medical criteria for the study. Czeisler did not specify the reason, and Glenn declined to elaborate. Researchers had rated the melatonin experiment as one of two top priorities among the human studies to take place during Glenn's Shuttle flight. Four members of the Shuttle flight for the Neurolab mission, which occurred earlier in 1998, had participated in the melatonin study, and Chiaki Mukai, a member of Glenn's crew, would be a fifth participant. However, Glenn's disqualification meant that the scientists would be unable to test two of their four hypotheses.
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