Tracking electromechanical muscle dynamics using ultrafast ultrasound and high-density EMG

Conference paper (2019)

Authors

R. Waasdorp ImPhys/Medical Imaging - AS
W. Mugge Biomechatronics & Human-Machine Control - Mechanical, Maritime and Materials Engineering
H.J. Vos Erasmus MC,
J.H. de Groot Leiden University Medical Center
N. de Jong Erasmus MC,
M.D. Verweij Erasmus MC,
A.C. Schouten Biomechatronics & Human-Machine Control - Mechanical, Maritime and Materials Engineering , University of Twente
Research Group
Biomechatronics & Human-Machine Control (Mechanical, Maritime and Materials Engineering) (TU Delft)
Copyright: © 2019 R. Waasdorp, W. Mugge, H.J. Vos, J.H. de Groot, N. de Jong, M.D. Verweij, A.C. Schouten, V. Daeichin
DOI: https://doi.org/10.1109/ULTSYM.2019.8925557
Stimulation High-density electromyography Excitation-contraction coupling Muscle Ultrafast ultrasound
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Published Date

2019

Language

English

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Faculty

Mechanical, Maritime and Materials Engineering

Department

Biomechanical Engineering

Research Group

Biomechatronics & Human-Machine Control

Abstract

Current methods to track the progression and evaluate treatment of muscular dystrophies are scarce. The electromechanical delay (EMD), defined as the time lag from muscle electrical activity to motion onset, has been proposed as a biomarker, but provides only limited insight in the pathophysiol-ogy of muscle function. This work proposes and evaluates a novel method to track the propagation of electromechanical waves in muscles, using high density electromyography and ultrafast ultrasound imaging. Muscle contractions in three healthy subjects were evoked by electrical stimulation, and the subsequent propagating action potentials were successfully tracked in all 90 trials. Contractile waves were detected in 83 recordings. Detection rate varied across muscle depth. Mean (SD) velocities for the action potential were 3.71 (0.08) m/s, 4.73 (0.35) m/s and 3.27 (0.09) m/s for participant 1, 2 and 3 respectively. Velocities for the contractile wave were 3.83 (1.07) m/s, 3.32 (0.78) m/s and 3.41 (0.69) m/s for participant 1, 2 and 3 respectively. In conclusion, our technique can track the fast muscular electromechanical dynamics with high spatiotemporal resolution by combining ultrafast ultrasound imaging and high-density electromyography.