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Science 3 October 1975:
Vol. 190. no. 4209, pp. 72 - 74
DOI: 10.1126/science.1166302
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Articles

Science, Vol 190, Issue 4209, 72-74
Copyright © 1975 by American Association for the Advancement of Science

articles

Ventricular obstruction: effect on drinking induced by intracranial injection of angiotensin

J Buggy, AE Fisher, WE Hoffman, AL Johnson, and MI Phillips

Lesions of the subfornical organ (SFO) severely attenuated drinking induced by injections of angiotensin II into the lateral ventricles, but a few days (4 to 14) later a recovery of the drinking response is observed. A possible explanation for this is that other dipsogenic sites are involved which are beyond the interventricular foramen and that SFO lesions produce an obstruction by edema or debris at the foramen which blocks access of cerebrospinal fluid-borne angiotensin to those sites. This hypothesis is supported by tracer studies and by direct injection into the third ventricle of SFO-lesioned animals. Other studies reported implicate the anteroventral third ventricle as a likely site for angiotensin receptors.


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