The effect of inter-electrode distance on radial muscle displacement and contraction time of the biceps femoris, gastrocnemius medialis and biceps brachii, using tensiomyography in healthy participants.

Autor: Wilson HV; Musculoskeletal Health Research Group, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds, England, United Kingdom. Centre for Pain Research, School of Clinical and Applied Sciences, Leeds Beckett University, Leeds, England, United Kingdom. School of Clinical and Applied Sciences, Leeds Beckett University, LS13HE, Leeds, United Kingdom., Jones A, Johnson MI, Francis P
Jazyk: angličtina
Zdroj: Physiological measurement [Physiol Meas] 2019 Jul 30; Vol. 40 (7), pp. 075007. Date of Electronic Publication: 2019 Jul 30.
DOI: 10.1088/1361-6579/ab1cef
Abstrakt: Background: The systematic effect of inter-electrode distance on electrically elicited radial muscle displacement (Dm) and contraction time (T c ) of the biceps femoris, gastrocnemius medialis and biceps brachii using tensiomyography (TMG) is currently unavailable.
Objective: To investigate the effects of inter-electrode distance (4 cm, 5 cm, 6 cm and 7 cm) on Dm and T c of the biceps femoris, gastrocnemius medialis and biceps brachii, when the current amplitude is standardised.
Approach: A within subject, repeated measures cross-over study.
Participants: 24 participants.
Main Results: Biceps femoris and gastrocnemius medialis Dm increased with increased inter-electrode distance (biceps femoris: p   =  0.015; gastrocnemius medialis: p   =  0.000), yet T c were not affected (p   >  0.05). Biceps brachii Dm was not affected by inter-electrode distance (p   >  0.05), yet T c became shorter with increased inter-electrode distance (p   =  0.032).
Significance: Inter-electrode distance affects Dm but not T c in two pennate muscles (biceps femoris and gastrocnemius medialis), and T c but not Dm in one parallel muscle (biceps brachii). Based on Dm measurements, optimal muscle specific inter-electrode distances were judged within the limits of this study. The following optimal inter-electrode distances are suggested: biceps femoris  =  6 cm, gastrocnemius medialis  =  7 cm and biceps brachii  =  4 cm. Our findings emphasise the importance of accurate implementation and reporting of inter-electrode distance, for the reproducibility and comparability of studies using TMG.
Databáze: MEDLINE
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