A critical analysis of therapeutic vesicoinhibitory electrical stimulation is presented based on a study of ten patients with suprasacral spinal cord lesions and detrusor hyperreflexia. The detrusor contraction was either completely abolished, or the threshold of the contraction significantly increased, with electrical stimulation delivered to the dorsal nerves of penis (or clitoris) via surface electrodes. A current strength of 0.09 to 3.5 times the bulbocavernosus reflex threshold was used.

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Proof is provided for mixed slow and fast twitch myofiber structure of the prostatocapsular component of human male rhabdosphincter. Sustained (tonic) contraction of slow myofibers probably reinforces the role of urethral smooth muscle in maintaining continence during bladder filling. Swift contraction of fast myofibers that abound caudally in the capsule probably supplements urethral closure by the bulkier membranous urethral part of the rhabdosphincter in preventing leakage of urine under stress when voiding is imminent or willfully withheld.

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