Intrinsic neuromuscular defects in the neurogenic bladder: IV. Loss of somatomotor and preservation of autonomic innervation of the male feline rhabdosphincter following bilateral sacral ventral rhizotomy

摘要

AbstractInnervation of the male feline rhabdosphincter was studied ultrastructurally 1 and 2 weeks following bilateral sacral ventral rhizotomy. In all samples, there was virtual loss of myelinated axons, degeneration and loss of the axonal element of all motor end‐plates, and preservation of autonomic nonrnyelinated (cholinergic, adrenergic, and probable copcptidergic) axons, as well as their nonspecialized surface contacts with myofibers of the rhabdosphincter. These observations provide solid evidence for the existence of both somatomotor and autonomic cholinergic innervation of the male feline rhabdosphincter and indicate that its potential neural control shortly after somatic denervation is exercised exclusively by autonomic axonlmyofiber surface contact