ELECTROMYOGRAPHIC STUDY OF THE STRIATED URETHRAL SPHINCTER BY USING THE BULBOCAVERNOSUS REFLEX

Autor:	Akira Takeuchi, Yasuhiro Kaiho, Takashige Namima, Tetsutaro Ohnuma, Masataka Aizawa, Seiichi Orikasa, Keiichiro Uchi, Yosuke Nishimura, Haruo Nakagawa
Rok vydání:	2000
Předmět:	medicine.medical_specialty business.industry Urology Urethral sphincter media_common.quotation_subject Triceps reflex Stimulation medicine.disease Urination medicine.anatomical_structure Bulbocavernosus reflex medicine Evoked potential business Spinal cord injury Penis media_common
Zdroj:	The Japanese Journal of Urology. 91:715-722
ISSN:	1884-7110 0021-5287
DOI:	10.5980/jpnjurol1989.91.715
Popis:	PURPOSE The change of sacral reflex activity of the striated urethral sphincter in the urine storage phase is investigated using evoked potential reaction of the bulbocavernosus reflex (BCR). METHODS Eleven normal male subjects and 13 male patients with neurogenic bladder due to suprasacral (C3-C7) spinal cord injury (SCI patients) were investigated. Within the SCI patients, five were complete SCI and 8 were incomplete SCI. BCR was elicited by electrical stimulation of dorsal nerve of the penis, and the evoked potential of the BCR was recorded with a concentric needle electrode from the periurethral striated muscle. BCR was performed both at empty and at filled bladder respectively, and changes of the amplitudes (AMP) were examined. Moreover, the changes of AMP affected by bladder filling were compared between the normal subjects and the SCI patients. RESULTS In both the normal subjects and the SCI patients, AMP increased at the filled bladder as compared with that of the empty bladder. In addition, the change of AMP was statistically bigger in the SCI patients (a ratio of amplitude at filled bladder/amplitude at empty bladder: 4.73 +/- 3.90) than in the normal subjects (the ratio: 1.32 +/- 0.44). CONCLUSION Sacral reflex activity was accelerated by bladder filling in both the normal subjects and SCI patients. And the acceleration in the SCI patients was more remarkable than that in the normal subjects. In addition to the conventional evaluation of the integrity of sacral reflex arc by BCR examination, the observation of changes of BCR affected by bladder filling may provide the information for the continuity of sacral segment and supraspinal micturition center.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::02f7811e7beeb370e916d64328c7d010 https://doi.org/10.5980/jpnjurol1989.91.715 Zobrazit plný text záznamu