PERFORMANCE OF THE MONKEY FOLLOWING MULTIPLE, SUPRALETHAL PULSES OF RADIATION.
ARMED FORCES RADIOBIOLOGY RESEARCH INST BETHESDA MD
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Fourteen male monkeys Macaca mulatta were trained to perform a visual discrimination task by shock avoidance conditioning. Each animal was exposed to two pulses of radiation separated in time by 6 hours. The total midline tissue dose was approximately 5000 rads. Performance following the second 2500-rad pulse was significantly better than performance following the first pulse. Performance following the second pulse was also significantly better than the performance of a group of animals exposed to a single 4500-rad pulse. Survival time of these two groups was not significantly different. Author