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Title:Motor unit characteristics after targeted muscle reinnervation
Authors:ID Kapelner, Tamás (Author)
ID Jiang, Ning (Author)
ID Holobar, Aleš (Author)
ID Vujaklija, Ivan (Author)
ID Roche, Aidan (Author)
ID Farina, Dario (Author)
ID Aszmann, Oskar (Author)
Files:.pdf PLOS_ONE_2016_Kapelner_et_al._Motor_Unit_Characteristics_after_Targeted_Muscle_Reinnervation.PDF (1,51 MB)
MD5: 3031E55C4B6A839411C6094B912B2A32
URL http://dx.plos.org/10.1371/journal.pone.0149772
Work type:Scientific work
Typology:1.01 - Original Scientific Article
Organization:FERI - Faculty of Electrical Engineering and Computer Science
Abstract:Targeted muscle reinnervation (TMR) is a surgical procedure used to redirect nerves originally controlling muscles of the amputated limb into remaining muscles above the amputation, to treat phantom limb pain and facilitate prosthetic control. While this procedure effectively establishes robust prosthetic control, there is little knowledge on the behavior and characteristics of the reinnervated motor units. In this study we compared the m. pectoralis of five TMR patients to nine able-bodied controls with respect to motor unit action potential (MUAP) characteristics. We recorded and decomposed high-density surface EMG signals into individual spike trains of motor unit action potentials. In the TMR patients the MUAP surface area normalized to the electrode grid surface (0.25 ± 0.17 and 0.81 ± 0.46, p < 0.001) and the MUAP duration (10.92 ± 3.89 ms and 14.03 ± 3.91 ms, p < 0.01) were smaller for the TMR group than for the controls. The mean MUAP amplitude (0.19 ± 0.11 mV and 0.14 ± 0.06 mV, p = 0.07) was not significantly different between the two groups. Finally, we observed that MUAP surface representation in TMR generally overlapped, and the surface occupied by motor units corresponding to only one motor task was on average smaller than 12% of the electrode surface. These results suggest that smaller MUAP surface areas in TMR patients do not necessarily facilitate prosthetic control due to a high degree of overlap between these areas, and a neural information—based control could lead to improved performance. Based on the results we also infer that the size of the motor units after reinnervation is influenced by the size of the innervating motor neuron.
Keywords:target muscle reinnervation, motor unit, controlling muscles
Publication status:Published
Publication version:Version of Record
Year of publishing:2016
Number of pages:str. 1-7
Numbering:Letn. 11, št. 2
PID:20.500.12556/DKUM-66284 New window
ISSN on article:1932-6203
COBISS.SI-ID:19367702 New window
DOI:10.1371/journal.pone.0149772 New window
Publication date in DKUM:19.06.2017
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Record is a part of a journal

Title:PloS one
Publisher:Public Library of Science
COBISS.SI-ID:2005896 New window


License:CC BY 4.0, Creative Commons Attribution 4.0 International
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:19.06.2017

Secondary language

Keywords:ciljana mišična reinervacija, motorična enota, nadzor mišic


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