B R Kirkpatrick

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Rats were conditioned to fear a tone paired with shock to the feet. Retention tests 4 days later showed that consolidation had occurred. Other animals were not tested for retention at 4 days, but the tone was presented in order to reactivate their memories of the conditioning. An amnesia gradient was generated by low-intensity electrical stimulation of the(More)
Using an automated testing apparatus, the hypermotility induced by amphetamine had previously been found to be inhibited by intracerebroventricular (ICV) administration of salmon calcitonin (CT). The present study used a computer-supported direct observational method to characterize further the interactions of CT and amphetamine. After treatment with(More)
In rats treated with salmon calcitonin (CT) administered intracerebroventricularly (i.c.v., 85 or 8.5 pmol), spasmodic body movements, hopping and tail jerks, collectively termed dyskinesia, appeared within 1 h of administration and persisted for at least 24 h. In addition, spontaneous grooming, rearing and locomotion occurred less often in CT-treated rats(More)
Three experiments were designed to investigate some effects of low-level stimulation of the amygdaloid complex (AMYG) and the mesencephalic reticular formation (MRF). Experiment 1 used a tilt box to test for motivational and/or reinforcement effects and failed to demonstrate these effects with stimulation of either structure. Experiment 2 used a one-trial(More)
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