Abstract
The effect of a stimulus previously associated with shock on the spontaneous activity of rats with septal lesions and operated control rats was determined. All rats first received 50 signaled inescapable shock trials and then the signal was presented during a spontaneous activity task. Presentation of the signal during the activity task resulted in an exaggerated increase in activity in rats with septal lesions whereas control rats displayed only a slight increase in activity alternated with periods of no activity. The results are consistent with a reduced freezing hypothesis of septal lesions in aversive learning situations.
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