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Science 1 April 1977:
Vol. 196. no. 4285, pp. 87 - 89
DOI: 10.1126/science.402696
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Articles

Science, Vol 196, Issue 4285, 87-89
Copyright © 1977 by American Association for the Advancement of Science

articles

Angiotensin injected into the neostriatum after learning disrupts retention performance

JM Morgan and A Routtenberg

Angiotensin II, injected into the dorsal neostriatum of rats 5 minutes after they had learned a passive avoidance task, disrupted the retention of the task 24 hours later. Identical neostriatal injections given 22 hours after learning (2 hours before retention) were without effect on retention performance. Ventral neostriatum or posterior thalamus were ineffective sites for injection of angiotensin. Injection of thyrotropin releasing hormone or lysine-8-vasopressin into the dorsal neostriatum was ineffective.These findings indicate a possible role for endogenous angiotensin in the neostriatum on retention performance and suggest potential involvement in mnemonic processes.


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