Shafik A
Department of Surgery and Research, Faculty of Medicine, Cairo University, Egypt.
Eur J Obstet Gynecol Reprod Biol. 1995 Jun;60(2):161-4. doi: 10.1016/0028-2243(95)02095-a.
A new reflex, termed the 'vagino-levator reflex', was studied in 17 healthy women (mean age 36.6 years). The vagina was distended with up to 300 ml air in a condom tied to a catheter, and the levator ani response was determined by means of needle electrode introduced into the muscle. The test was repeated after anesthetizing the vagina and the levator muscle, respectively. The levator EMG activity rose when the vagina was distended; the amplitude and duration of activity increased in parallel with vaginal distension. The levator response did not occur after successive repetition of vaginal distension due probably to levator muscle fatigue; nor did it occur after anesthetizing the vagina or the levator muscle. The mean latency of the reflex was 39.5 ms. The vagino-levator reflex seems to play a role in the sexual act. Levator contraction upon penile thrusting leads to genital responses that could facilitate sexual performance. These responses comprise widening of the vaginal introitus, vaginal elongation and ballooning of the upper vagina as well as uterine elevation. Vagino-levator reflex dysfunction may result in disorders of sexual act.
在17名健康女性（平均年龄36.6岁）中研究了一种新的反射，称为“阴道-提肌反射”。将连接在导管上的避孕套内充入多达300毫升空气使阴道扩张，通过插入肌肉的针电极来测定肛提肌的反应。分别对阴道和提肌进行麻醉后重复该测试。阴道扩张时肛提肌肌电图活动增强；活动的幅度和持续时间随着阴道扩张而平行增加。由于可能是提肌疲劳，在连续重复阴道扩张后未出现提肌反应；在麻醉阴道或提肌后也未出现。该反射的平均潜伏期为39.5毫秒。阴道-提肌反射似乎在性行为中起作用。阴茎插入时提肌收缩会导致生殖器反应，这可能有助于性行为。这些反应包括阴道口变宽、阴道伸长和阴道上段膨胀以及子宫抬高。阴道-提肌反射功能障碍可能导致性行为障碍。
