INFLUENCE OF PROPRIOCEPTIVE VAGAL AFFERENTS ON PANTING AND ACCESSORY PANTING MOVEMENTS IN MAMMALS AND BIRDS

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Abstract
Stimulation of the pulmonary stretch receptors by emphysema in the rabbit during panting progressively reduces the panting rate and results in apnea if prolonged. No such effect occurs in the non-anesthetized bird during panting. Under barbiturate narcosis stimulation of the stretch receptors results in slowing of the panting rate in birds similar to that of the non-anesthetized mammal. Section (or narcotization) of either or both vagi has no effect on panting in mammals. Section (or narcotization) of either of the vagi of birds has no effect on panting. Section (or narcotization) of both vagi of birds immediately abolishes panting regardless of the order of sectioning. The vagal proprioceptive drive is relatively more significant in respiratory regulation in birds than in mammals.

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