Back to Search
Start Over
QUANTITATIVE ELECTROMYOGRAPHIC ANALYSIS OF THE EXTERNAL URETHRAL SPHINCTER USING AUTOMATIC DECOMPOSITION ELECTROMYOGRAPHY ON NORMAL SUBJECTS
- Source :
- The Japanese Journal of Urology. 84:1573-1579
- Publication Year :
- 1993
- Publisher :
- Japanese Urological Association, 1993.
-
Abstract
- Motor unit action potentials (MUPs) of the external urethral sphincter muscle during cystometry were analysed on six normal males. Electrodes were of concentric needle type having the exposed tip surface of 0.07 mm2, and the potential changes were analysed by automatic decomposition electromyography (ADEMG), for isolation and characterization of unit discharges. Number of analysed units was as follows: Two at rest, 4 at first desire to void, and 6 at maximum desire to void. Number of the recorded units and the firing rate were increased along with the degree of bladder filling. Average MUP figures as follows: Amplitude of 206 microV, 8.3 msec. duration, and 5.4 Hz firing rate at rest; 246 microV, 9.7 msec and 7.3 Hz at first desire to void; 277 microV. 9.7 msec and 7.2 Hz at maximum desire to void, respectively. It is concluded that external urethral sphincter maintains its urinary continence by excitation of the neuromuscular units, and by the increase in the firing rate of individual MUP during bladder filling.
- Subjects :
- Adult
Male
medicine.medical_specialty
genetic structures
Urology
Action Potentials
Electromyography
Concentric
Urethra
Reference Values
medicine
Humans
medicine.diagnostic_test
Urinary continence
Electromyographic analysis
business.industry
Muscles
Urethral sphincter
Cystometry
Needle type
Signal Processing, Computer-Assisted
Middle Aged
Motor unit
business
Biomedical engineering
Subjects
Details
- ISSN :
- 18847110 and 00215287
- Volume :
- 84
- Database :
- OpenAIRE
- Journal :
- The Japanese Journal of Urology
- Accession number :
- edsair.doi.dedup.....9dc6def2576cc457c6ec5d6027837940