A New Technique for Assessing the Efferent Innervation of the Human Striated Urethral Sphincter

Abstract

A technique is described for recording the electromyographic response of the striated urethral sphincter to transcutaneous magnetic stimulation of the brain and spinal cord. A series of 11 control patients have been studied and 3 examples of patients with neurological disease also are reported. The most reliable response was recorded after facilitated transcranial stimulation of the cerebral cortex, with the mean latency of the electromyographic response in the striated sphincter being 26.4 msec. (standard deviation 2.21). It is concluded that assessment of the latency of the striated urethral sphincter electromyographic response to transcranial magnetic stimulation may be a useful technique in the investigation of patients with disorders of micturition.

Latency of compound muscle action potentials of the anal sphincter after magnetic sacral stimulation

“…Several reports have been published on motor latencies of the external anal sphincter or pelvic floor muscles after magnetic stimulation of the lumbosacral roots. [4][5][6][7][8][9]13,15,16,18,21 Different recording electrodes have been used, but all have major disadvantages. The use of a needle electrode 4,15,16,18 or glovemounted electrode 6,8,9,21 is invasive and may be poorly tolerated by the patient.…”

Peripheral repetitive magnetic stimulation for the treatment of neurogenic urinary disorders: literature review and investigational study

“…I. Eardley и соавт. показали возможность регистрации моторного ответа с наружного сфинктера уретры как у мужчин, так и у женщин [8]. В других работах моторные ответы были получены при использовании поверхностного отведения с перианальной области, промежности, влагалища [9][10][11].…”

Functional magnetic stimulation of the spinal cord—a urodynamic study in healthy humans

“…When applied to human tissues, these magnetic ¢elds stimulate non-invasively nerves by inducing currents and depolarization. This technique has been used for evaluating e¡erent nerves innervating the pelvic £oor [Opsomer et al, 1989;Eardley et al, 1990] and could establish motor latencies for the pudendal motorneurons to the external urethral and anal sphincter [Pelliccioni et al, 1997;Morren et al, 2001;Sha¢k, 2001] and to the bladder [Bemelmans et al, 1992]. Soon afterwards, ideas came up to use magnetic stimulation as a treatment option for various disorders of the pelvic organs.…”