CHANGES OF CEREBRAL CIRCULATION INDUCED BY LABYRINTHINE STIMULATION

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Abstract
In expts. on cats, the cerebral circulation was recorded thermoelectrically on labyrinthine stimulation. With all types of stimulation used (calorization, galvanization, rotation), a slowing of the cerebral blood flow was observed accompanying the fall of systemic blood pressure. This reaction as well as the retardation of the cerebral blood flow on stimulation of centripetal vagal fibers are chiefly brought about indirectly through the changes in the systemic circulation, since both reactions persisted after interruption of the cervical sympathetic nerve and/or of the vasodilator tract joining the facial and great superficial petrosal nerve.

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