Ultrasound Echogenicity as an Indicator of Muscle Fatigue During Functional Electrical Stimulation
- 1. UNC/NCSU Joint Department of Biomedical Engineering, North Carolina State University and University of North Carolina at Chapel Hill
- 2. The Department of Bioengineering, School of Engineering, University of Pittsburgh; the Center for Ultrasound Molecular Imaging and Therapeutics, Department of Medicine and Heart and Vascular Institute, University of Pittsburgh School of Medicine and University of Pittsburgh Medical Center; the Department of Mechanical Engineering and Materials Science, School of Engineering, University of Pittsburgh; the McGowan Institute for Regenerative Medicine, University of Pittsburgh and University of Pittsburgh Medical Center
Description
This supplementary material contains four videos of the tibialis anterior muscle's ultrasound imaging during the functional electrical stimulation (FES)-induce muscle fatigue progressions. Both isometric and dynamic conditions are included for two participants, Sub03 and Sub05.
Under the isometric condition, there are 15 FES-induced muscle contraction cycles during the 120-second fatigue progression. Under the dynamic condition, there are 30 FES-induced muscle contraction cycles during the 240-second fatigue progression.
In each video, the left y-axis represents the depth (unit: mm) from the skin to the deep muscle layer and the x-axis represents the width (unit: mm) of the ultrasound transducer with the middle point as 0 mm. The right gray-scaled bar represents the normalized ultrasound intensity value for each pixel in the image.
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- Cites
- Journal article: 10.1007/s10439-020-02536-7 (DOI)