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The effects of morphine sulfate on single-unit activities of various dorsal-horn Rexed laminae were studied using an extracellular microelectrode recording technique in decerebrate spinal cats. Morphine sulfate, 0.5, 1, and 2 mg/kg, iv, suppressed in a dose-related manner spontaneous single-unit act
Kitahata et al. (Mon,) studied this question.