Shafik A
Faculty of Medicine, Cairo University, Egypt.
Paraplegia. 1992 Mar;30(3):210-3. doi: 10.1038/sc.1992.57.
A new reflex which I call the 'ano-urethral reflex' is described and its clinical significance discussed. It was studied in 16 volunteers with normal vesical and rectal functions. A concentric needle electrode was introduced into the external and sphincter (stimulating), and another one into the external urethral sphincter (recording). The reflex response was recorded by EMG apparatus. The external urethral sphincter basal activity was increased with stimulation of the external anal sphincter. This reflex response was absent when the external and sphincter was anesthetised. The average latency of the reflex was 129.5 ms. Reflex urethral sphincter contraction at defecation guards against involuntary micturition which may result from rectal distension and levator contraction. The anourethral reflex can be a valuable diagnostic tool in routine investigations of patients with urological and proctological complaints.
本文描述了一种新的反射，我将其称为“肛门 - 尿道反射”，并讨论了其临床意义。该反射在16名膀胱和直肠功能正常的志愿者身上进行了研究。将同心针电极插入肛门外括约肌（用于刺激），另一个插入尿道外括约肌（用于记录）。通过肌电图仪记录反射反应。刺激肛门外括约肌时，尿道外括约肌的基础活动增强。当肛门外括约肌麻醉时，这种反射反应消失。该反射的平均潜伏期为129.5毫秒。排便时尿道括约肌的反射性收缩可防止因直肠扩张和提肌收缩导致的不自主排尿。肛门 - 尿道反射在对有泌尿系统和直肠疾病主诉的患者进行常规检查时可能是一种有价值的诊断工具。
