Accession Number : AD0680740

Title :   EFFECT OF HEAD VERSUS TRUNK FISSION-SPECTRUM RADIATION ON LEARNED BEHAVIOR IN THE MONKEY.

Descriptive Note : Rept. for Nov 67-Feb 68,

Corporate Author : SCHOOL OF AEROSPACE MEDICINE BROOKS AFB TEX

Personal Author(s) : Chapman,Paul H. ; Young,Robert J.

Report Date : AUG 1968

Pagination or Media Count : 17

Abstract : Twenty-two Macaca mulatta monkeys, trained to a discrete avoidance task, were divided into three groups for exposure to either head only, trunk only, or whole-body radiation with a pulsed fission source. A total dose of 6,250 rads was delivered in a 20-msec. pulse. Trained behavior and blood pressure were monitored continuously during the first hour postirradiation. Results indicate that: (1) head or trunk irradiation will produce deterioration in performance; (2) early performance decrement results primarily from a direct effect of radiation on cephalic structures; (3) this head effect is dose-rate dependent; (4) trunk effects are significant in producing a more uniform early decrement and a more severe later decrement; and (5) the hypotensive response seen immediately after whole-body radiation is secondary to radiation effects within the trunk. (Author)

Descriptors :   (*BEHAVIOR, RADIATION EFFECTS), MONKEYS, FISSION PRODUCT ACTIVITY, PATHOLOGY, PERFORMANCE(HUMAN), EXPOSURE(PHYSIOLOGY), DOSE RATE, HEAD(ANATOMY), HUMAN BODY, BLOOD PRESSURE, WHOLE BODY IRRADIATION, FAILURE, LABORATORY ANIMALS, HYPOTENSION

Subject Categories : Psychology
      Radiobiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE