TY - GEN
T1 - In vivo relationship between joint stiffness, joint-based estimates of muscle stiffness, and shear-wave velocity
AU - Vigotsky, Andrew D.
AU - Rouse, Elliott J.
AU - Lee, Sabrina S.M.
N1 - Funding Information:
Research supported by the American Society of Biomechanics’ Graduate Student Grant-In-Aid. This material is based upon work supported by the National Science Foundation Graduate Research Fellowship under Grant No. DGE-1324585.
Publisher Copyright:
© 2018 IEEE.
PY - 2018/10/26
Y1 - 2018/10/26
N2 - Shear-wave (SW) ultrasound elastography is both a clinical and research tool that is increasingly being used to quantify the material properties of muscle. However, how SW velocity relates to stiffness changes on the joint- and musclelevels is poorly understood. Therefore, the purpose of this work was to develop a biomechanical model to estimate plantar flexor muscle stiffness, and measure joint stiffness, joint-based estimates of muscle stiffness, and medial gastrocnemius (MG) SW velocity under different activations (0, 20, and 40%) to quantify the relationships between 1) joint stiffness and jointbased estimates of muscle stiffness; 2) joint stiffness and MG SW velocity; and 3) joint-based estimates of muscle stiffness and MG SW velocity. Our main findings include strong relationships between 1) joint stiffness and joint-based estimates of muscle stiffness ( R2= 0.70) and 2) joint stiffness and MG SW velocity ( R2= 0.66), and a weak relationship between joint-based estimates of muscle stiffness and MG SW velocity ( R2= 0.24). These findings further our understanding of SW velocity measures in muscle and provide a biomechanical model to decompose muscle stiffness from joint stiffness.
AB - Shear-wave (SW) ultrasound elastography is both a clinical and research tool that is increasingly being used to quantify the material properties of muscle. However, how SW velocity relates to stiffness changes on the joint- and musclelevels is poorly understood. Therefore, the purpose of this work was to develop a biomechanical model to estimate plantar flexor muscle stiffness, and measure joint stiffness, joint-based estimates of muscle stiffness, and medial gastrocnemius (MG) SW velocity under different activations (0, 20, and 40%) to quantify the relationships between 1) joint stiffness and jointbased estimates of muscle stiffness; 2) joint stiffness and MG SW velocity; and 3) joint-based estimates of muscle stiffness and MG SW velocity. Our main findings include strong relationships between 1) joint stiffness and joint-based estimates of muscle stiffness ( R2= 0.70) and 2) joint stiffness and MG SW velocity ( R2= 0.66), and a weak relationship between joint-based estimates of muscle stiffness and MG SW velocity ( R2= 0.24). These findings further our understanding of SW velocity measures in muscle and provide a biomechanical model to decompose muscle stiffness from joint stiffness.
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U2 - 10.1109/EMBC.2018.8512484
DO - 10.1109/EMBC.2018.8512484
M3 - Conference contribution
C2 - 30440670
AN - SCOPUS:85056615227
T3 - Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBS
SP - 1468
EP - 1471
BT - 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2018
Y2 - 18 July 2018 through 21 July 2018
ER -