Cescon, Corrado and Raimondi, Eleonora Ester and Začesta, Vita and Drusany-Starič, Kristina and Martsidis, Konstantinos and Merletti, Roberto (2014) Characterization of the motor units of the external anal sphincter in pregnant women with multichannel surface EMG. International urogynecology journal, 25 (8). pp. 1097-1103. ISSN 0937-3462
Full text not available from this repository.Abstract
Introduction and hypothesis Locating the innervation zones (IZs) of the external anal sphincter (EAS) is helpful to obstetricians to identify areas particularly vulnerable to episiotomy in pregnant women. The aim was to investigate the motor unit (MU) properties of the EAS during voluntary contractions. Methods Electromyographic signals were detected, from 478 pregnant women, by means of an intra-anal cylindrical probe carrying a circumferential array of 16 electrodes. The signals were decomposed into the constituent MU action potential trains and 5,947 templates were extracted and analyzed in order to identify the IZ position. Results MUs innervated at one end are concentrated in the dorsal portion of the sphincter, while MUs innervated in the middle are distributed symmetrically in the left and right portions of the EAS. The angular propagation velocity was estimated for eachMUresulting in 260±45 rad/s, corresponding to 1.8 m/s on the probe surface and to about 4 m/s at a radial depth of 10 mm from the probe surface. Conclusions A novel method for identification and classification of MUs of the EAS is proposed and applied to a largescale study. It is possible to distinguish MUs of the EAS in a minimally invasive way and identify their IZs. This information should be used to plan episiotomies and minimize risks of EAS denervation.
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Uncontrolled Keywords: | Innervation zone; External anal sphincter; Multichannel surface electromyography; EMG |
| Subjects: | Engineering Engineering > General engineering > Bioengineering, biomedical engineering & clinical engineering |
| Department/unit: | Dipartimento economia aziendale, sanità e sociale > Laboratorio di ricerca in riabilitazione |
| Depositing User: | Corrado Cescon |
| Date Deposited: | 12 May 2014 08:32 |
| Last Modified: | 07 Feb 2024 12:13 |
| URI: | http://repository.supsi.ch/id/eprint/4692 |
Actions (login required)
 |
View Item |