Qualitative analysis of the influence of concentric needle electrode components on motor unit potential
Keywords:
Motor unit potentials, Concentric needle electrodeAbstract
In order to analyze the influence of Concentric needle electrode(CNE) components, 36 healthy volunteers were examined.MUAP parameters were analyzed after applying themanual method of extraction. The research was performedon the following muscles: m. vastus lateralis (MVL; depth ofinsertion were 0 cm/subfascial insertion and 1.5 centimetre(cm) perpendicularly (900) and obliquely (450) on muscle fibredirection, and temporal muscle (depth of insertion 0 cm/subfascial insertion and 1.5 cm rectangular (900) on musclefibre direction or parallel on fossa temporalis) on either side.In contrast to monopole montages, the qualitative EMG analysisconfirmed that EMG potential detected with CNE is notrelevant enough to determine the precise location of muscle(end-plate, tendon); compared with that of the central corewaveform, the MUAP shape recorded by CNE is usually different.It has also been confirmed that cannula, albeit in rarecases, might have a “contributing” instead of “diminishing”influence on CNE MUAP parameters, and this, in turn, mightlead to a wrong interpretation or even pathological findings. Inview of the contributing effects of CNE components we recommenda qualitative division of MUAPs of healthy persons.Downloads
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