The effects of 1000 and 2000 rad Cobalt-60 on electrical self- stimulation of subcortical brain areas and blood pressure were investigated to determine whether radiation-induced performance decrement occurs in a like manner for a positively-rewarded behavioral task as it does for the more typically studied shock- avoidance task. During the early post radiation minutes self- stimulation responses decreased or ceased and resumed shortly thereafter, revealing ...
The effects of 1000 and 2000 rad 60Co on electrical self-stimulation of subcortical brain areas and blood pressure were investigated to determine whether radiation-induced performance decrement occurs in a like manner for a positiviely-rewarded behavioral task as it does for the more typically studied shock-avoidance task. During the early postradiation minutes self-stimulation responses decreased or ceased and resumed shortly thereafter, revealing a similar course of performance decrement as seen with ...
The report presents findings on the behavioral effects of Cobalt-60 gamma irradiation on monkeys performing a complex delayed match-to-sample (DMTS) task or a simpler visual memorization task. It was found that the DMTS group reflected clear performance decrement at lower doses (e.g., several hundred rads midbody) than previously reported, while the memorization animals tended to show either no decrement or, in a few cases, response cessation (i.e., early transient incapacitation). ...
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