Interaction of stress and morphine in the rat using a classical conditioning design

Akil, 1976, Stress induced increase in endogenous opioid peptides: Concurrent analgesia and its partial reversal by naloxone Amir, 1978, Endogenous opioid ligands may mediate stress induced changes in the affective properties of pain related behavior in rats, Life Sciences, 28, 1143, 10.1016/0024-3205(78)90348-X Belluzzi, 1976, Enkephalin may mediate euphoria and drive reduction reward, Nature (London), 260, 625, 10.1038/260625a0 Bodnar, 1978, Dose dependent reductions by naloxone of analgesia induced by cold water stress, Pharmacology Biochemistry Behavior, 8, 667, 10.1016/0091-3057(78)90264-2 Bodnar, 1978, Stress produced analgesia and morphine produced analgesia, 8, 661 Castellano, 1975, Effects of morphine and heroin on discrimination learning and consolidation in mice, Psychopharmacologia, 42, 235, 10.1007/BF00421262 Gallagher, 1978, Manipulation of opiate activity in amygdala alters memory processes, Life Science, 23, 1973, 10.1016/0024-3205(78)90565-9 Hayes, 1978, Behavioral and physiological studies of non-narcotic analgesia in the rat elicited by certain environmental stimuli, Brain Research, 155, 69, 10.1016/0006-8993(78)90306-2 Jaffee, 1975, Drug addiction and drug abuse Jensen, 1978, Morphine and nalaxone alter memory in the rat, Society for Neuroscience Abstracts, 4, 260 Katz, 1979, Stress induced Straub tail elevation—further behavioral evidence for the involvement of endorphins in stress, Neuroscience Letters, 13, 249, 10.1016/0304-3940(79)91502-7 Katz, 1979, A rapid and inexpensive technique for assessing the reinforcing effects of opiate drugs, Pharmacology Biochemistry Behavior, 11, 231, 10.1016/0091-3057(79)90019-4 Katz, 1979, Stress induced grooming—an endorphin mediated syndrome?, Neuroscience Letters, 13, 209, 10.1016/0304-3940(79)90043-0 Katz, R. J., Roth, K. A., & Schmaltz, K. Endogenous opiates as mediators of activation and coping. In Proceedings of the International Narcotic Research Conference. Pergamon, Long Island City, N.Y. In press. Modadori, 1978, Facilitation of memory processing by postrial morphine: Possible involvement of reinforcement mechanisms, Psychopharmacology, 63, 297, 10.1007/BF00433566 Roth, 1979, Stress, behavioral arousal, and open field activity an examination of emotionality in the rat, Neuroscience and Biobehavioral Reviews, 10.1016/0149-7634(79)90012-5 Siegel, 1956 Silverstein, 1978, Critical values for non parametric multiple comparisons, Psychological Reports, 43, 44, 10.2466/pr0.1978.43.1.44 Stapleton, 1979, Affective consequences and subsequent effects on morphine self administration of d-ala-2-methionine enkephalin, Physiological Psychology, 7, 146, 10.3758/BF03332900 Stein, 1978, Endorphins and the sense of well being: A psychobiological approach, Vol. 18, 299