[Arterial pressure reactions due to A- and C-afferent discharges of the sciatic nerve in anesthetized and unanesthetized frogs]

Abstract

The role of impulses of sciatic nerve A- and C-afferents in the reflex changes of arterial pressure was studied in anesthetized and unanesthetized frogs. In anesthetized frogs, A-fiber excitation(A beta- and "fast" A delta-fiber subgroups) evoked depressor reflexes, impulses of "slow" A delta-fibers decrease them and C-fiber excitation evoked pressor reflexes. In unanesthetized frogs, only pressor reflexes can be evoked. Impulses of A delta-fibers evoke small pressor reflexes and impulses of C-fibers increase them. A beta-fibers excitation evoked small reflexes only in some unanesthetized animals. A single stimulus of sciatic nerve A- and C-fibers evokes in the renal nerve A- and C-responses consisting of excitatory and inhibitory component.