Hypothalamic lesions producing polyuria in chickens

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Permanent polyuria was produced in chickens. Some of these also showed polydipsia; otherwise, the chickens appeared normal; they ate normally, laid eggs, and maintained normal body temperatures. The combs of the cocks and hens were normal and there was no evidence to indicate any impairment in reproductive functions. The low levels of arginine vasotocin in the posterior pituitaries indicated primary polyuria; however, the occurrence of crops distended with water in some chickens also suggested a primary polydipsia. No differences in plasma sodium and potassium, nor in plasma osmolality, were found between lesioned and nonlesioned chickens. Evidence suggesting functional intestinal obstruction and its correction by hydrocortisone is discussed.

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Present address: Department of Physiology, University of Arkansas Medical Center, Little Rock, Arkansas.

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