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Mechanomyographic responses during recruitment curves in the soleus muscle
Author(s) -
Miramonti Amelia A.,
Jenkins Nathaniel D.M.,
Oza Preeti D.,
Weir Joseph P.,
Cramer Joel T.
Publication year - 2017
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.25432
Subject(s) - reliability (semiconductor) , h reflex , soleus muscle , physical medicine and rehabilitation , medicine , reflex , mathematics , cardiology , physics , skeletal muscle , power (physics) , quantum mechanics
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.