Gerstenberg T C, Nordling J, Hald T
Department of Urology, Herlev Hospital, University of Copenhagen, Denmark.
Scand J Urol Nephrol Suppl. 1991;138:41-6.
Spinal and cerebral evoked potentials (EPs) on stimulation of the dorsal nerve of the penis, clitoris, bladder wall and posterior urethra were recorded in 20 normal subjects (10 females and 10 males). Responses were obtained by computer averaging of multiple potentials registered over the spinal cord (L1) and cerebral cortex. Responses from the posterior tibial nerve were also recorded. Consistent cortical responses were obtained from the pudendal nerve, bladder wall and posterior urethra, whereas spinal responses were difficult to record. The maximum responses after stimulation of the pudendal nerve, bladder wall and posterior urethra were recorded over the midline of the scalp at CZ-2 cm point. The configuration of the somatosensory evoked potentials of the pudendal nerve had a W-shape with a consistent positive peak P1 (median 42.0 msec, range 39-45 msec), whereas the responses after endovesical and endourethral stimulation mainly were M-shaped with a prominent negative peak N1 (Bladder: mean 104.0 msec, range 75-112 msec and posterior urethra: median 103.0 msec, range 78-114 msec). Conduction times within the central spinal pathways could be calculated by subtracting the latencies of the peripheral spinal potentials from the central cortical potentials.
对20名正常受试者（10名女性和10名男性）记录了刺激阴茎背神经、阴蒂、膀胱壁和后尿道时的脊髓和脑诱发电位（EPs）。通过对脊髓（L1）和大脑皮层记录的多个电位进行计算机平均来获得反应。还记录了胫后神经的反应。从阴部神经、膀胱壁和后尿道获得了一致的皮层反应，而脊髓反应难以记录。刺激阴部神经、膀胱壁和后尿道后的最大反应记录在头皮中线CZ - 2 cm点处。阴部神经体感诱发电位的形态为W形，有一个一致的正峰P1（中位数42.0毫秒，范围39 - 45毫秒），而膀胱内和尿道内刺激后的反应主要为M形，有一个突出的负峰N1（膀胱：平均104.0毫秒，范围75 - 112毫秒；后尿道：中位数103.0毫秒，范围78 - 114毫秒）。中枢脊髓通路内的传导时间可通过从皮层中枢电位中减去外周脊髓电位的潜伏期来计算。
