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Force generated by finger flexor muscles depends on the rate of fingertip loading.

Kursa K; Diao E; Rempel D
48th Annual Meeting of the Orthopaedic Research Society, February 9-12, 2002, Dallas, Texas. Rosemont, IL: Orthopaedic Research Society, 2002 Feb; :1
Risk factors for tendon disorders of the hand may include the force level, rate of force application, number of repetitions, and hand posture. To better understand injury mechanisms and to develop effective preventive measures, it is important to understand how these external factors affect internal tendon loading. Static force models have been used to predict internal forces in tendons of the finger, but they include simplifying assumptions to solve the complex problem (1, 2). In an effort to validate these models, the relationship between the force at the fingertip and the in vivo force in one or both flexor tendons has been measured and reported during static loading (3, 4). The forces in the tendons exceeded model predictions and contained large variability between subjects in both studies. Finger position, force level and loading rate could affect the motor control strategy and distribution of forces among the muscles of the finger. The goal of this investigation was to determine whether the rate of force application affected the in vivo force in the flexor digitorum profundus (FDP) tendon and the flexor digitorum superficialis (FDS) tendon when the subjects pressed on a hard surface.
Muscles; Musculoskeletal-system-disorders; Hand-injuries; Injury-prevention; Injuries; Risk-factors; Models; In-vivo-studies; Biomechanics; Repetitive-work
Department of Bioengineering, University of California-San Francisco, 1301 South 46th Street, Building 163, Richmond, CA 94804, USA
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Disease and Injury: Musculoskeletal Disorders of the Upper Extremities
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48th Annual Meeting of the Orthopaedic Research Society, February 9-12, 2002, Dallas, Texas
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University of California, Richmond, California
Page last reviewed: September 2, 2020
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