Abstract
The effects of various forms of prior enforced sleep Td (SD) and of pre-shock (PS), as presumed traumatizing agents, were studied in rats 15 days following treatment using an approach-avoidance test procedure involving successive response to food, mild punishment, food, and weak punishment. PS Ss and Ss whose SD treatment involved prolonged walking on an abrasive surface exhibited greater avoidance of the food area to mild punishment than controls, while Ss whose SD treatment consisted of prolonged walking on a smooth surface or prolonged standing in deep water exhibited significantly less conflict. With one exception, similar results were obtained under the weak test punishment.
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