title: Selective control by posterior spinal nerve roots of micturition and erection in rats.
abstract: The posterior rootlets in L6 and S1 spinal cord of adult male Sprague-Dawley rats underwent electrostimulation. The bladder pressure, urethral perfusion pressure and intracavernous pressure were recorded. When some posterior rootlets of L6 and S1 were electrostimulated, the intracavernous pressure peaked rapidly, but the bladder pressure and the urethral perfusion pressure curve did not show great change. When other rootlets were stimulated, the bladder pressure changed greatly, but the urethral perfusion pressure and the intracavernous pressure did not show great change. When different rootlets were stimulated, the urethral perfusion pressure changed maximally, but there were no great changes in bladder pressure or intracavernous pressure. Furthermore, stimulation of some rootlets produced simultaneous changes in two or three different pressure measures mentioned above. The results demonstrate that regulation by L6 and S1 posterior rootlets of the rat bladder detrusor, external urethral sphincter and penis cavernous body are significantly distinct. Different rootlets can be distinguished by electrostimulation.
authors.affiliation: Department of Rehabilitation Medicine, Third Hospital, Peking University, Beijing 100191, China.
authors.forename: Wenting
authors.initials: W
authors.lastname: Wang
authors.affiliation: Department of Rehabilitation Medicine, Third Hospital, Peking University, Beijing 100191, China.
authors.forename: Mouwang
authors.initials: M
authors.lastname: Zhou
authors.affiliation: Department of Rehabilitation Medicine, Third Hospital, Peking University, Beijing 100191, China.
authors.forename: Genying
authors.initials: G
authors.lastname: Zhu
authors.affiliation: Department of Rehabilitation Medicine, Third Hospital, Peking University, Beijing 100191, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.affiliation: Department of Rehabilitation Medicine, Third Hospital, Peking University, Beijing 100191, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Liu
keywords: Sprague-Dawley rats; electrophysiology; neural regeneration; neurogenic bladder; penile erection; spinal cord injury; urination