A dynamic model for simulating movements of the elbow, forearm, and wrist

Lemay, Michel; Crago, P.E.

doi:10.1016/0021-9290(96)00026-7

Cited by 192 publications

(107 citation statements)

References 44 publications

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“…PCSA data were taken from Chao et al (1989) for the fingers and from Ramsay et al (2009) for the wrist. According to the posture adopted during this experiment, muscle moment arms were computed assuming a neutral position (0° in flexion-extension, abduction-adduction and pronation-supination) for all joints using the data from Chao et al (1989) for the fingers and from Lemay and Crago (1996) for the wrist. Moment arms about the finger…”

Section: Data Analysis and Estimations Of The Muscle Capacitiesmentioning

confidence: 99%

Estimation of hand and wrist muscle capacities in rock climbers

2014

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imbalance between flexor and extensor capacities which suggests a potential risk of pathologies. Conclusions The practice of climbing not only increased the strength of climbers but also resulted in specific adaptations among hand muscles. The proposed method and the obtained data could be re-used to optimize the training programs as well as the rehabilitation processes following hand pathologies. Muscle imbalance ratio of the j joint (j = MCP or wrist) Keywords AbstractPurpose This study investigated the hand and wrist muscle capacities among expert rock climbers and compared them with those of non-climbers. The objective was to identify the adaptations resulting from several years of climbing practice. Methods Twelve climbers (nine males and three females) and 13 non-climber males participated in this study. Each subject performed a set of maximal voluntary contractions about the wrist and the metacarpo-phalengeal joints during which net joint moments and electromyographic activities were recorded. From this data set, the muscle capacities of the five main muscle groups of the hand (wrist flexors, wrist extensors, finger flexors, finger extensors and intrinsic muscles) were estimated using a biomechanical model. This process consisted in adjusting the physiological crosssectional area (PCSA) and the maximal muscle stress value from an initial generic model. Results Results obtained from the model provided several new pieces of information compared to the analysis of only the net joint moments. Particularly, the capacities of the climbers were 37.1 % higher for finger flexors compared to non-climbers and were similar for finger extensor and for the other muscle groups. Climbers thus presented a greaterCommunicated by Nicolas Place.

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Section: Data Analysis and Estimations Of The Muscle Capacitiesmentioning

confidence: 99%

Estimation of hand and wrist muscle capacities in rock climbers

2014

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“…PCSA data was taken from Chao, An, Cooney, and Linscheid (1989) for the fingers, and from Ramsay, Hunter, and Gonzalez (2009) for the wrist. Depending on the posture adopted during this experiment, muscle moment arms were computed assuming a neutral position (0° in flexion-extension, abduction-adduction, and pronation-supination) for all joints using the data from Chao et al (1989) for the fingers, and from Lemay and Crago (1996) for the wrist. Moment arms about the finger joints were scaled for each participant using their hand length (Chao et al, 1989).…”

Section: Data Analysis and Estimation Of Muscle Capacitiesmentioning

confidence: 99%

Assessment of the risk and biomechanical consequences of lateral epicondylalgia by estimating wrist and finger muscle capacities in tennis players

Vigouroux

Monsabert

Hayot

et al. 2016

Sports Biomechanics

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Previous studies suggested that a pronounced weakness of the extensor muscles relative to the flexor muscles could increase the risk of occurrence of lateral epicondylalgia. This study investigates this hypothesis by estimating the ratio of extensor to flexor muscle capacities among healthy non-players (n = 10), healthy tennis players (n = 20), symptomatic players (n = 6), and players who have recovered from lateral epicondylalgia (n = 6). Maximum net joint moments in flexion or extension were measured during seven tasks involving the voluntary contraction of wrist and fingers. Using these data, the muscle capacities of the main muscle groups of the hand (wrist flexors, wrist extensors, finger flexors, finger extensors, and intrinsic muscles) were estimated using a musculoskeletal model. These capacities were then used to compute the extensor/flexor capacity ratios about the wrist and the finger joints. Compared to healthy nonplayers, healthy players presented higher extensor muscle capacities and greater capacity ratios showing that playing tennis generates specific adaptations of muscle capacities. Interestingly, symptomatic players, similar to those of non-players, showed more imbalanced ratios than healthy players. These results confirm that the ratio of extensor/flexor muscle capacities seems to be associated with lateral epicondylalgia and can be further used to understand its incidence and consequences.

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“…The muscle stress limit (S max ) has been obtained from Zajac (1989). The remaining required parameters to establish the force-length and force-velocity relationships have been obtained from Lee and Rim (1990), Lemay and Crago (1996), Jacobson et al (1992) and Kaufman et al (1991). Most of the muscles do not act directly on the bones, but through the force transmitted to the tendons.…”

Section: Musculoskeletal Modelmentioning

confidence: 99%

Grasp modelling with a biomechanical model of the hand

Sancho-Bru

Mora

León

et al. 2012

Computer Methods in Biomechanics and Biomedical Engineering

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The use of a biomechanical model for human grasp modelling is presented. A previously validated biomechanical model of the hand has been used. The equilibrium of the grasped object has been added to the model through the consideration of a soft contact model. A grasping posture generation algorithm has been also incorporated to the model. All the geometry has been represented using a spherical extension of polytopes (s-topes) for efficient collision detection.The model has been used to simulate an experiment in which a subject was asked to grasp two cylinders of different diameter and weight. Different objective functions have been checked to solve the indeterminate problem. The normal finger forces estimated by the model have been compared to the ones experimentally measured. The popular objective function sum of the squared muscle stresses has been shown not suitable for the grasping simulation, requiring at least being complemented by task dependent grasp quality measures.

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A dynamic model for simulating movements of the elbow, forearm, and wrist

Cited by 192 publications

References 44 publications

Estimation of hand and wrist muscle capacities in rock climbers

Estimation of hand and wrist muscle capacities in rock climbers

Assessment of the risk and biomechanical consequences of lateral epicondylalgia by estimating wrist and finger muscle capacities in tennis players

Grasp modelling with a biomechanical model of the hand

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