Demonstrates differential reflex responses in cardiac vagal efferent fibers depending on the specific sensory nerve stimulated in a canine model.
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Highlights nerve-specific modulation of cardiac vagal activity in dogs; extends reflex arc understanding but leaves open human translation.
Centrifugal action potentials were observed in the cardiac branches of the right vagus of the dog when various sensory nerves were electrically stimulated.2. Single-pulse stimulation of the sinus nerve reflexively induced impulses in the cardiac branches after a latent period of approximately 60msec.3. Stimulation of the nerves containing no specific cardioregulatory afferent fiber, such as saphenous and brachial nerves, did not induce impulses in the cardiac branches but nonspecifically inhibited spontaneous impulses in them.
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Iriuchijima et al. (1963) studied this question.
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