Manipulation of opiate activity in the amygdala alters memory processes

Michela Gallagher; B. S. Kapp

doi:10.1016/0024-3205(78)90565-9

Manipulation of opiate activity in the amygdala alters memory processes

Research output: Contribution to journal › Article

Abstract

The opiate agonist, levorphanol, injected into the amygdala complex of rats following passive avoidance conditioning produced time-dependent and dose-dependent decreases in retention. This effect obtained with levorphanol was observed to be stereospecific. In addition, post-training administration of the opiate antagonist, naloxone, into the amygdala significantly increased retention of passive avoidance conditioning in a time-dependent and dose-dependent manner. Finally, these opposing effects of opiate agonist and antagonist administration were blocked by combined administration of levorphanol and naloxone. These data support a possible role for amygdala opioid peptides in time-dependent memory processes.

Original language	English (US)
Pages (from-to)	1973-1977
Number of pages	5
Journal	Life Sciences
Volume	23
Issue number	19
DOIs	https://doi.org/10.1016/0024-3205(78)90565-9
Publication status	Published - Nov 9 1978
Externally published	Yes

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ASJC Scopus subject areas

Pharmacology

Cite this

Gallagher, M., & Kapp, B. S. (1978). Manipulation of opiate activity in the amygdala alters memory processes. Life Sciences, 23(19), 1973-1977. https://doi.org/10.1016/0024-3205(78)90565-9

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AB - The opiate agonist, levorphanol, injected into the amygdala complex of rats following passive avoidance conditioning produced time-dependent and dose-dependent decreases in retention. This effect obtained with levorphanol was observed to be stereospecific. In addition, post-training administration of the opiate antagonist, naloxone, into the amygdala significantly increased retention of passive avoidance conditioning in a time-dependent and dose-dependent manner. Finally, these opposing effects of opiate agonist and antagonist administration were blocked by combined administration of levorphanol and naloxone. These data support a possible role for amygdala opioid peptides in time-dependent memory processes.

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10.1016/0024-3205(78)90565-9