Cescon, Corrado and Mesin, Luca and Nowakowski, Michal and Merletti, Roberto (2011) Geometry assessment of anal sphincter muscle based on monopolar multichannel surface EMG signals. Journal of Electromyography and Kinesiology, 21 (2). pp. 394-401. ISSN 1050-6411
Full text not available from this repository.Abstract
Anatomical studies on the external anal sphincter (EAS) indicate that superficial muscle fibres are circular at low depth within the anal canal. A more complex geometry of the fibres is documented for increasing depth within the muscle and along the anal canal. Monopolar intra-anal EMG signals recorded using an array of electrodes placed in circular direction have no common mode components if the muscle fibres are circular, with constant depth within the muscle and parallel to the detection array. Thus, the presence of common mode signals may provide indications about the geometry of muscle fibres of EAS. Intra-anal EMG signals were recorded from EAS of 12 subjects using an anal probe carrying three circumferential arrays of 16 electrodes at three depths within the anal canal. Contribution of common mode components in single MUAPs was lower for MUs located superficially in the muscle (Pearson correlation coefficient: R=-0.75, p<<0.001) and at a lower depth within the anal canal (non-parametric one way Kruskal-Wallis ANOVA, Χ=17.3, p<0.001), in line with EAS anatomy. A large contribution of common mode components was found in the interference signal, suggesting that the signal receives contributions from far, large muscles (e.g. puborectalis, glutei).
| Item Type: | Scientific journal article, Newspaper article or Magazine article |
|---|---|
| Uncontrolled Keywords: | Electromyography; Monopolar detection; Sphincter muscles |
| Subjects: | Engineering > General engineering > Bioengineering, biomedical engineering & clinical engineering |
| Depositing User: | Corrado Cescon |
| Date Deposited: | 13 Sep 2013 11:44 |
| Last Modified: | 19 May 2016 09:39 |
| URI: | http://repository.supsi.ch/id/eprint/2746 |
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