Behavioral Method for Study of Pain in the Monkey

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Science  06 Jan 1961:
Vol. 133, Issue 3445, pp. 37-38
DOI: 10.1126/science.133.3445.37


A behavioral method is described in which increasing intensities of electric shocks were applied to the gasserian ganglia of alert monkeys. The animals were trained to press a lever to regulate the shock level. "Pain thresholds" were thereby obtained, and these thresholds were modified by varying the shock duration and by administration of morphine.