title: Analysis of brain wave records from Gemini flight GT-7 by computations to be used in a thirty day primate flight.
abstract: It is planned to study central nervous, cardiovascular and metabolic functions in a 6.8 kg macaque monkey (Macaca nemestrina) flown in earth orbit for a period of 30 days during 1967. Monitoring of central nervous functions will be by electroencephalographic (EEG) electrodes in surface and deep brain structures, and by electromyographic (EMG) recordings from neck and trunk musculature. Eye movements will be recorded by the electro-oculogram (EOG) and galvanic skin responses (GSR) will be assessed from the skin of the foot. Respiration will be recorded with an impedance pneumogram (ZPG), together with the electro-cardiogram (EKG). Behavioral tasks will involve tests of perception and recent memory (delayed matching to sample) and eye-hand coordination tests of vestibular functions and spatial orientation. Urine will be collected by a special catheterization technique and subjected to in-flight recording. Our extensive development of EEG spectral analysis techniques has proven the feasibility of accurate assessment of states of alertness, particularly in relation to decision-making requirements, and states of drowsiness, fatigue and detection of levels of sleep, including dream states. We have applied these techniques to approximately 60 hr of EEG data gathered on one subject in a Gemini astronaut flight (GT-7). Data will be presented on states of sleep and wakefulness in this subject during the first 55 hr of flight, with reference to possible changes induced by the space environment.
authors.affiliation: Space Biology Laboratory, Brain Research Institute, University of California, Los Angeles, California, USA.
authors.forename: W R
authors.initials: WR
authors.lastname: Adey
authors.forename: R T
authors.initials: RT
authors.lastname: Kado
authors.forename: D O
authors.initials: DO
authors.lastname: Walter
mesh_terms: D000818:Animals; D001273:Atmosphere Exposure Chambers; D004569:Electroencephalography; D004576:Electromyography; D004585:Electrooculography; D005243:Feces; D005712:Galvanic Skin Response; D006801:Humans; D008254:Macaca nemestrina / Q000502:physiology*; D008297:Male; D011597:Psychomotor Performance; D012890:Sleep; D013026:Space Flight; D013048:Specimen Handling; D014556:Urine; D014851:Wakefulness; D014893:Weightlessness; D018474:Weightlessness Simulation