The changes in the activity of pudendal motoneurons in relation to reflex micturition evoked in decerebrate cats.

Abstract Reflex micturition was evoked in both non-immobilized ( n =5) and immobilized ( n =5) decerebrate cats by filling the bladder with physiological saline. Intracellular recordings were made from pudendal motoneurons (PU-MNs; n =14) throughout the periods of before, during and after reflex micturition. The changes in the activity of PU-MNs were correlated with those in the intravesical pressure. Our results support the proposition that coordination of the sphincters and the detrusors is established by a gating mechanism, which is activated by the supraspinal source such as the pontine micturition center.