Carpometacarpal joint of the human thumb

Kuczynski, K

doi:10.1097/00006534-197508000-00060

Cited by 33 publications

(42 citation statements)

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“…Electrogoniometric studies with a gimbal coordinate system provide estimates on elbow [76] and wrist [19,84,94] ROM for functional activities. The functional CMC joint range is harder to assess even with constraining experiments [43,55,74], given the discrete but exacting motion of this joint and the functional restriction splints might impart [87].…”

Section: Thumb Motion Relative To the Upper Limbmentioning

confidence: 99%

The 2014 ABJS Nicolas Andry Award: The Puzzle of the Thumb: Mobility, Stability, and Demands in Opposition

Ladd

Crisco

Hagert

et al. 2014

Clin Orthop Relat Res

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Section: Thumb Motion Relative To the Upper Limbmentioning

confidence: 99%

The 2014 ABJS Nicolas Andry Award: The Puzzle of the Thumb: Mobility, Stability, and Demands in Opposition

Ladd

Crisco

Hagert

et al. 2014

Clin Orthop Relat Res

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“…Anatomical studies of the hand and the thumb have been conducted to understand the joint structure and the mechanisms of actuation of the fingers [6]. For instance, the opposition mechanism of the thumb is assessed through anatomical analysis of hand skeletal bones [7], or analysis of the variability of the trapeziometacarpal motion [8]. It is well acknowledged that the loss of the thumb corresponds to the loss of 40% of the hand function [9], however, a common agreement on the mechanics of the human thumb opposition has not been reached yet [10].…”

Section: Introductionmentioning

confidence: 99%

The Role of the Thumb: Study of Finger Motion in Grasping and Reachability Space in Human and Robotic Hands

Cotugno

Althoefer

Nanayakkara

2017

IEEE Trans. Syst. Man Cybern, Syst.

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Abstract-It is well acknowledged that the opposing thumb granted humans advanced manipulation capabilities. However, such feature is not statistically quantified and its representation is not formally addressed in robotics yet. This paper studies whether the displacement of the opposing thumb in humans is a determining factor for shaping the grip. Using statistical analysis of the variability of motion capture data from the GRASP database, we found that the displacement of the thumb plays a leading role on the shaping of the grip, independently from the specific object being grasped. Furthermore, we map and compare the reachability spaces of the human thumb and two state-of-the-art robotic thumbs -the Shadow and the iCub hands. We conclude that the kinematics of robotic thumbs does not evenly span the reachability space of the human thumb, favouring precision grasping motions. Hence our findings contributes to the discussion of the optimal modelling of robotic hands.

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“…Yet, a detailed analysis of in vivo 3-D kinematics of the CMC joint has not been reported to date. The existing body of literature is based on cadaver studies [13,15,17,26], skin marker-based studies that track motion of the thumb, but not the trapezium [4,6,9,18,19,21,31], or single-subject imaging studies whose purpose has been to verify that flexion/extension and adduction/abduction are the primary degrees of freedom at the CMC joint [3,7]. Elucidation of OA pathogenesis requires quantitative methods capable of determining both bone rotations (osteokinematics) and articular surface translations (arthrokinematics) and large samples from different demographic groups.…”

Section: Introductionmentioning

confidence: 99%

In Vivo Kinematics of the Thumb Carpometacarpal Joint During Three Isometric Functional Tasks

Halilaj

Rainbow

Got

et al. 2014

Clinical Orthopaedics &Amp; Related Research

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Background The thumb carpometacarpal (CMC) joint is often affected by osteoarthritis-a mechanically mediated disease. Pathomechanics of the CMC joint, however, are not thoroughly understood due to a paucity of in vivo data. Questions/purposes We documented normal, in vivo CMC joint kinematics during isometric functional tasks. We hypothesized there would be motion of the CMC joint during these tasks and that this motion would differ with sex and age group. We also sought to determine whether the rotations at the CMC joint were coupled and whether the trapezium moved with respect to the third metacarpal. Methods Forty-six asymptomatic subjects were CT-scanned in a neutral position and during three functional tasks (key pinch, jar grasp, jar twist), in an unloaded and a loaded position. Kinematics of the first metacarpal, third metacarpal, and the trapezium were then computed. Results Significant motion was identified in the CMC joint during all tasks. Sex did not have an effect on CMC joint kinematics. Motion patterns differed with age group, but these differences were not systematic across the tasks. Rotation at the CMC joint was generally coupled and posture of the trapezium relative to the third metacarpal changed significantly with thumb position. Conclusions The healthy CMC joint is relatively stable during key pinch, jar grasp, and jar twist tasks, despite sex and age group. Clinical Relevance Our findings indicate that directionally coupled motion patterns in the CMC joint, which lead to a specific loading profile, are similar in men and women. These patterns, in addition to other, nonkinematic influences, especially in the female population, may contribute to the pathomechanics of the osteoarthritic joint.

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Carpometacarpal joint of the human thumb

Cited by 33 publications

References 1 publication

The 2014 ABJS Nicolas Andry Award: The Puzzle of the Thumb: Mobility, Stability, and Demands in Opposition

The 2014 ABJS Nicolas Andry Award: The Puzzle of the Thumb: Mobility, Stability, and Demands in Opposition

The Role of the Thumb: Study of Finger Motion in Grasping and Reachability Space in Human and Robotic Hands

In Vivo Kinematics of the Thumb Carpometacarpal Joint During Three Isometric Functional Tasks

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