THE EFFECT OF RESECTION OF THE OLFACTORY, GUSTATORY AND TRIGEMINAL NERVES ON WATER DRINKING IN DOGS WITHOUT AND WITH DIABETES INSIPIDUS

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Abstract
Water drinking was observed in 3 groups of dogs: in (1) the gustatory sense was believed abolished, and anesthesia of the pharynx was believed obtained by division of the glosso-pharyngeal nerves and chordae tympani bilaterally; in (2) all sensations except taste were believed abolished from the buccal cavity by division of the trigeminal nerves bilaterally; and in (3) the olfactory sense was believed abolished by resection of the olfactory tracts. In each group water drinking was observed in the normal state and in the state of diabetes insipidus. Water drinking in normal amts. and in the excessive amts. of diabetes insipidus was not abolished or altered in dogs deprived of these senses. The urge to drink may not be identified with any one of the nervous pathways that were interrupted, or with any single one of the types of sensations that they mediate.

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