PMID- 16580693 OWN - NLM STAT- MEDLINE DCOM- 20060905 LR - 20061115 IS - 0022-4804 (Print) IS - 0022-4804 (Linking) VI - 134 IP - 2 DP - 2006 Aug TI - Non-invasive assessment of the gracilis muscle by means of surface electromyography electrode arrays. PG - 265-9 AB - PURPOSE: The purpose of the study was the non-invasive investigation of the innervation zone (IZ) location of the gracilis muscle of both thighs by means of surface electromyography (EMG). MATERIALS AND METHODS: Multichannel EMG signals were detected by means of a flexible array of 16 equally spaced silver bar electrodes. Tests were performed on both gracilis muscles on 15 subjects. Motor unit (MU) action potentials were visually identified and extracted. The locations of the IZs of the recognized MUs were statistically analyzed to find significant differences between the subjects and between the right and left muscle of each subject. RESULTS AND CONCLUSIONS: A statistically significant difference was found between the gracilis IZ position in the two sides, with more proximal IZs on the left side. This difference suggests a possible role of surface EMG in preoperative evaluation of patients prepared for the dynamic graciloplasty procedure. This test would provide an objective criterion for the choice of the gracilis muscle to be transposed with the highest probability of success. FAU - Bottin, Andrea AU - Bottin A AD - Laboratory for Engineering of the Neuromuscular System (LISiN), Department of Electronics, Politecnico di Torino, Italy. FAU - Cescon, Corrado AU - Cescon C FAU - Nowakowski, Michal AU - Nowakowski M FAU - Herman, Roman Maria AU - Herman RM LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20060331 PL - United States TA - J Surg Res JT - The Journal of surgical research JID - 0376340 SB - IM MH - Action Potentials MH - Adult MH - Electrodes MH - Electromyography/instrumentation/*methods MH - Fecal Incontinence/surgery MH - Humans MH - Male MH - Muscle Contraction/physiology MH - Muscle, Skeletal/*innervation MH - Neuromuscular Junction/physiology MH - Thigh EDAT- 2006/04/04 09:00 MHDA- 2006/09/06 09:00 CRDT- 2006/04/04 09:00 PHST- 2005/07/29 00:00 [received] PHST- 2006/01/25 00:00 [revised] PHST- 2006/02/06 00:00 [accepted] PHST- 2006/04/04 09:00 [pubmed] PHST- 2006/09/06 09:00 [medline] PHST- 2006/04/04 09:00 [entrez] AID - S0022-4804(06)00061-8 [pii] AID - 10.1016/j.jss.2006.02.012 [doi] PST - ppublish SO - J Surg Res. 2006 Aug;134(2):265-9. doi: 10.1016/j.jss.2006.02.012. Epub 2006 Mar 31.