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Science 23 July 1976:
Vol. 193. no. 4250, pp. 332 - 334
DOI: 10.1126/science.7016
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Articles

Science, Vol 193, Issue 4250, 332-334
Copyright © 1976 by American Association for the Advancement of Science

articles

Cholinergic changes during conditioned suppression in rats

JN Hingtgen, JE Smith, PA Shea, MH Aprison, and TM Gaff

Levels of acetylcholine were significantly elevated in the telencephalon and diencephalon + mesencephalon of rats killed by near-freezing during conditioned suppression of food-reinforced lever pressing, whereas levels of serotonin, dopamine, and norepinephrine were not altered. These neurochemical changes were not seen in rats serving as controls for conditioning experience, activity levels, or stimulus presentation.


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Stress and coping factors influence tumor growth.
L. Sklar and H Anisman (1979)
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