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  • Title: Bulbocavernosus reflex in normal men and in patients with neurogenic bladder and/or impotence.
    Author: Ertekin C, Reel F.
    Journal: J Neurol Sci; 1976 May; 28(1):1-15. PubMed ID: 180261.
    Abstract:
    The bulbocavernosus reflex was investigated electrophysiologically in 14 normal adult male subjects and in 80 patients with neurogenic bladders and/or impotence due to various neurological causes as well as in patients with functional impotence. The glans penis was stimulated superficially by single electrical shocks and the reflex responses were recorded from the bulbocavernosus (BC) and the striated anal sphincter muscles by means of concentric needle EMG electrodes. In all normal subjects, the BC reflex was recorded from the BC muscle as a stable and constant response having a mean latency of 36.1 msec. A response from the external anal sphincter was obtained in only 21% of the subjects investigated. In 13 patients with cauda equina lesions, the BC reflex was either absent or was present with a prolonged latency. Twenty-two patients with polyneuropathy of various causes were also investigated; in these patients the latency of the BC reflex was significantly greater than in the normal controls, but the most abnormal results were obtained in cases of alcoholic polyneuropathy. In the 19 cases of spinal cord disease with spasticity the BC reflex response was very intense, often with after discharges but latency values were within normal limits. In the 16 cases with functional impotence, the BC reflexes were basically normal; but in 3 cases, the threshold of the reflex was significantly raised, and in 1 case a prolonged latency was observed. The value and the practical application of the BC reflex in the BC reflex in the differential diagnosis of bladder dysfunction and of impotence was stressed.
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