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首页> 外文期刊>Archives of Andrology: An International Journal >Urethral sphincters response to cavernosus muscles stimulation with identification of cavernoso-urethral reflex.
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Urethral sphincters response to cavernosus muscles stimulation with identification of cavernoso-urethral reflex.

机译：尿道括约肌对海绵体肌肉刺激的反应通过识别海绵体－尿道反射。

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The functional activity of the urethral sphincters during cavernosus muscles' contraction at coitus has been poorly addressed in the literature. We investigated the hypothesis that cavernosus muscles' contraction affects reflex contraction of the urethral sphincters to guard against semen reflux into the urinary bladder or urine leakage from the bladder during orgasm and ejaculation. The electromyographic (EMG) response of the external (EUS) and internal (IUS) urethral sphincters to ischio- (ICM) and bulbo- (BCM) cavernosus muscle stimulation was studied in 15 healthy volunteers (9 men, 6 women, age 39.3 +/- 8.2 SD years). An electrode was applied to each of ICM and BCM (stimulating electrodes) and the 2 urethral sphincters (recording electrodes). The test was repeated after individual anesthetization of the urethral sphincters and the 2 cavernosus muscles, and after using saline instead of lidocaine. Upon stimulation of each of the 2 cavernosus muscles, the EUS and IUS recorded increased EMG activity.Repeated cavernosus muscles' stimulation evoked the urethral sphincteric response without fatigue. The urethral sphincters did not respond to stimulation of the anesthetized cavernosus muscles nor did the anesthetized urethral sphincters respond to cavernosus muscle stimulation. Saline infiltration instead of lidocaine did not affect the urethral sphincteric response to cavernosal muscle stimulation. Results were reproducible. Cavernosus muscles' contraction is suggested to effect EUS and IUS contraction. This action seems to be reflex and mediated through the 'cavernoso-urethral reflex.' Urethral sphincters contraction upon cavernosus muscles contraction during sexual intercourse presumably prevents urine leak from the urinary bladder to urethra, prevents retrograde ejaculation, and propels ejaculate from the posterior to the penile urethra. The cavernoso-urethral reflex can act a diagnostic tool in the investigations of patients with ejaculatory disorders.
机译：在文献中，在海绵体肌肉在性交时的收缩过程中，尿道括约肌的功能活性尚未得到很好的解决。我们研究了以下假设：海绵体肌肉的收缩会影响尿道括约肌的反射收缩，以防止高潮和射精时精液回流到膀胱或尿液从膀胱漏出。在15名健康志愿者中研究了外部（EUS）和内部（IUS）尿道括约肌对坐骨（ICM）和球囊（BCM）海绵体肌肉刺激的肌电图（EMG）反应（9名男性，6名女性，年龄39.3 + /-8.2 SD年）。将电极分别应用于ICM和BCM（刺激电极）和2个尿道括约肌（记录电极）。分别麻醉尿道括约肌和2条海绵体肌肉后，并使用生理盐水代替利多卡因后，重复进行该测试。 EUS和IUS对2条海绵体肌肉进行刺激后，其EMG活性均增加。重复的海绵体肌肉刺激引起尿道括约肌反应而无疲劳。尿道括约肌对麻醉的海绵体肌肉的刺激无反应，麻醉的尿道括约肌对海绵体肌肉的刺激也无反应。盐水浸润代替利多卡因并不影响尿道括约肌对海绵体肌肉刺激的反应。结果是可重复的。提示海绵体肌肉收缩会影响EUS和IUS收缩。这种作用似乎是反射性的，并且是通过“海绵体-尿道反射性”介导的。性交期间尿道括约肌在海绵体肌肉收缩时的收缩大概可以防止尿液从膀胱漏到尿道，防止逆行射精，并推动从后部到阴茎尿道的射精。海绵体-尿道反射可以在诊断射精障碍患者中充当诊断工具。

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