Pradal-Prat D, Mares P, Peray P, Lopez S, Gagnard-Landra C
Service d'Explorations Fonctionnelles du Système Nerveux, C.H.U. Gaston Doumergue, Nîmes.
Electromyogr Clin Neurophysiol. 1998 Dec;38(8):491-6.
This study was a prospective study, it was undertaken on 172 subjects who had no prior central or peripheral nerve supply pathology and who had not an antecedent of anal surgery. The subjects had a normal value of the sacral reflex latency to be included in this study. In this population the value of the pudendal motor nerve latency was compared by age and sex in order to determine precise norms. There was 92 men whose age adveraged 36 +/- 14.57 years and 80 women with an average age of 55.03 +/- 15.7. The motor latency was obtained by stimulating the nerve by rectal or vaginal tuch-near the sciatic spine with a St Mark's electrod and taking a reading in the intemediate part of the external anal sphincter muscle. The intensity of the stimulation was 70 to 80 mA. The stimulation and the recording was repeteded five both on each side and the shorter latency whose choised. The value of the motor latency taken at the positive peak was analysed statiscally. The average value was 5.52 +/- 1.9 ms on right pudendal nerve and 5.74 +/- 1.6 ms on the left in male subjects and 6.16 +/- 1.8 in the right pudendal nerve and 6.42 +/- 1.96 on the left in female subjects. The values on right pudendal nerve latency varied from 4.9 +/- 1.28 ms in men and 4.76 +/- 1.6 ms. in women at under 28 years and to 5.06 +/- 2.06 ms in men and 7.7 +/- 1.8 ms in women at over 70 years. The values on the left side varied from 5.53 +/- 1.5 ms in men and 4.78 +/- 1.35 ms in women at under 28 years and to 5.06 +/- 2.06 ms in men and 8.47 +/- 1.95 ms in women at over 70 years. In men population, the value of the motor latency of the pudendal nerve is not correlated with age. In women population, the value is correlated with age.
本研究为前瞻性研究，研究对象为172名既往无中枢或周围神经供应病变且无肛门手术史的受试者。受试者的骶反射潜伏期值正常，方可纳入本研究。在该人群中，为确定精确的标准，按年龄和性别对阴部运动神经潜伏期值进行了比较。其中有92名男性，平均年龄为36±14.57岁；80名女性，平均年龄为55.03±15.7岁。通过用圣马克电极在坐骨棘附近经直肠或阴道触摸刺激神经，并在肛门外括约肌中间部分进行读数来获取运动潜伏期。刺激强度为70至80毫安。刺激和记录在每一侧均重复5次，选取较短的潜伏期。对在正峰值处获取的运动潜伏期值进行统计学分析。男性受试者右侧阴部神经的平均值为5.52±1.9毫秒，左侧为5.74±1.6毫秒；女性受试者右侧阴部神经为6.16±1.8毫秒，左侧为6.42±1.96毫秒。右侧阴部神经潜伏期值在28岁以下男性中为4.9±1.28毫秒，女性中为4.76±1.6毫秒；在70岁以上男性中为5.06±2.06毫秒，女性中为7.7±1.8毫秒。左侧的值在28岁以下男性中为5.53±1.5毫秒，女性中为4.78±1.35毫秒；在70岁以上男性中为5.06±2.06毫秒，女性中为8.47±1.95毫秒。在男性人群中，阴部神经运动潜伏期值与年龄无关。在女性人群中，该值与年龄相关。
