1. Mechanomyographic responses during recruitment curves in the soleus muscle
- Author
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Joseph P. Weir, Joel T. Cramer, Amelia A. Miramonti, Nathaniel D.M. Jenkins, and Preeti Deshpande Oza
- Subjects
Soleus muscle ,medicine.medical_specialty ,medicine.diagnostic_test ,Physiology ,business.industry ,030229 sport sciences ,Electromyography ,Compound muscle action potential ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,0302 clinical medicine ,Muscle nerve ,Physical medicine and rehabilitation ,Physiology (medical) ,Internal medicine ,Cardiology ,medicine ,Neurology (clinical) ,Analysis of variance ,medicine.symptom ,H-reflex ,business ,030217 neurology & neurosurgery ,Muscle contraction - Abstract
INTRODUCTION In this study we examined relationships among mechanomyographic (MMG), electromyographic (EMG), and peak twitch torque (PTT) responses as well as test-retest reliability when recorded during recruitment curves in the soleus muscle. METHODS PTT, EMG (M-wave, H-reflex), and MMG responses were recorded during recruitment curves in 16 subjects (age 24 ± 2 years) on 2 separate days. The sum of the M-wave and H-reflex (M+H) was calculated. Correlations among variables and test-retest reliability were determined. RESULTS MMG was correlated with PTT (mean r = 0.93, range r = 0.59-0.99), the M-wave (0.95, 0.04-0.98), and M+H (0.91, 0.42-0.97), but was unrelated to the H-reflex (-0.06, -0.56 to 0.47). Reliability was consistently high among most variables, but normalizing to the maximum value improved MMG reliability and the minimum detectable change. CONCLUSION MMG responses predicted 86%-90% of the variability in PTT, M-wave, and M+H; thus, MMG may be a useful alternative for estimating twitch torque and maximal activation. Muscle Nerve 56: 107-116, 2017.
- Published
- 2017