Shafik Ahmed, El Sibai Olfat, Shafik Ali A
Department of Surgery and Experimental Research, Faculty of Medicine, Cairo University, Cairo, Egypt.
J Reprod Med. 2008 Feb;53(2):111-6.
To investigate the hypothesis that glans clitoris (GC) penile buffeting effects contraction of the vaginal musculature and seems to increase arousal of the penis during coitus.
The response of the vaginal wall to GC electrical and mechanical stimulation was recorded in 26 healthy women (aged 36.8 +/- 6.7 years). The test was repeated after individual anesthetization of the GC and vagina using lidocaine gel and after application of bland gel instead of lidocaine.
The 2 vaginal electrodes recorded, at rest, slow waves followed or superimposed by action potentials. Wave parameters were similar from the 2 electrodes. Electrical or mechanical GC stimulation effected a significant increase in vaginal electromyographic (EMG) activity and pressure (p < 0.01). GC stimulation, while the vagina or GC had been separately anesthetized, produced no significant change, but there was a response following application of bland gel.
GC stimulation effected an increase in vaginal EMG activity and pressure and presumably indicated vaginal wall contraction. This action seems to be a reflex and is mediated through the clitorovaginal excitatory reflex. Vaginal wall contraction during coitus appears to effect penile arousal and, consequently, female sexual stimulation.
探讨阴蒂头（GC）阴茎冲击作用于阴道肌肉组织收缩并似乎在性交过程中增加阴茎勃起的假说。
记录了26名健康女性（年龄36.8±6.7岁）阴道壁对GC电刺激和机械刺激的反应。在使用利多卡因凝胶对GC和阴道进行单独麻醉后以及使用温和凝胶代替利多卡因后重复该测试。
两个阴道电极在静息时记录到慢波，其后或叠加有动作电位。两个电极的波参数相似。GC电刺激或机械刺激使阴道肌电图（EMG）活动和压力显著增加（p<0.01）。在阴道或GC分别麻醉时进行GC刺激，未产生显著变化，但使用温和凝胶后有反应。
GC刺激使阴道EMG活动和压力增加，推测表明阴道壁收缩。该作用似乎是一种反射，通过阴蒂-阴道兴奋性反射介导。性交过程中阴道壁收缩似乎会引起阴茎勃起，从而产生女性性刺激。
