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Characterization of the motor units of the external anal sphincter in pregnant women with multichannel surface EMGCescon, Corrado ...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.Source: International urogynecology journal. - ISSN 0937-3462 (Vol. 25, iss. 8, 2014, str. 1097-1103)Type of material - article, component partPublish date - 2014Language - englishCOBISS.SI-ID - 1323180
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source: International urogynecology journal. - ISSN 0937-3462 (Vol. 25, iss. 8, 2014, str. 1097-1103)
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Cescon, Corrado | ![]() |
Raimondi, E. | ![]() |
Začesta, Vita | ![]() |
Drusany Starič, Kristina | 32965 |
Martsidis, K. | ![]() |
Merletti, Roberto | ![]() |
Source: Personal bibliographies
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