Biomechanical Gain in Joint Excursion from the Curvature of the Achilles Tendon: Role of the Geometrical Arrangement of Inflection Point, Center of Rotation, and Calcaneus

Kinugasa, Ryuta; Yamamura, Naoto; Takagi, Shu; Sinha, Shantanu

doi:10.3390/diagnostics11112097

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Biomechanical Gain in Joint Excursion from the Curvature of the Achilles Tendon: Role of the Geometrical Arrangement of Inflection Point, Center of Rotation, and Calcaneus

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Department of Human Sciences, Kanagawa University, Yokohama 221-8686, Japan

Department of Mechanical Engineering, The University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan

Muscle Imaging and Modeling Laboratory, Department of Radiology, University of California San Diego, San Diego, CA 92121, USA

Author to whom correspondence should be addressed.

Academic Editor: Evangelos Terpos

Diagnostics 2021, 11(11), 2097; https://doi.org/10.3390/diagnostics11112097

Received: 21 October 2021 / Revised: 8 November 2021 / Accepted: 11 November 2021 / Published: 12 November 2021

(This article belongs to the Special Issue Translational Research on Muscle and Mobility Medicine)

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Abstract

The dorsal movement of the Achilles tendon during ankle rotation is restricted by anatomical obstructions. Previously, we demonstrated that the anatomical obstruction provides a gain (gain_AT) in the proximal displacement of the calcaneus compared to the change in the Achilles tendon length. Here, we empirically validate and extend our previous modeling study by investigating the effects of a broad range of obstruction locations on gain_AT. The largest gain_AT could be achieved when the obstruction was located on the most ventral and distal sides within the physiological range of the Achilles tendon, irrespective of the ankle position. View Full-Text

Keywords: ankle geometrical model; ankle plantarflexion; calcaneus position; gear; joint kinematics

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Kinugasa, R.; Yamamura, N.; Takagi, S.; Sinha, S. Biomechanical Gain in Joint Excursion from the Curvature of the Achilles Tendon: Role of the Geometrical Arrangement of Inflection Point, Center of Rotation, and Calcaneus. Diagnostics 2021, 11, 2097. https://doi.org/10.3390/diagnostics11112097

AMA Style

Kinugasa R, Yamamura N, Takagi S, Sinha S. Biomechanical Gain in Joint Excursion from the Curvature of the Achilles Tendon: Role of the Geometrical Arrangement of Inflection Point, Center of Rotation, and Calcaneus. Diagnostics. 2021; 11(11):2097. https://doi.org/10.3390/diagnostics11112097

Chicago/Turabian Style

Kinugasa, Ryuta, Naoto Yamamura, Shu Takagi, and Shantanu Sinha. 2021. "Biomechanical Gain in Joint Excursion from the Curvature of the Achilles Tendon: Role of the Geometrical Arrangement of Inflection Point, Center of Rotation, and Calcaneus" Diagnostics 11, no. 11: 2097. https://doi.org/10.3390/diagnostics11112097

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Biomechanical Gain in Joint Excursion from the Curvature of the Achilles Tendon: Role of the Geometrical Arrangement of Inflection Point, Center of Rotation, and Calcaneus

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