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Published Erratum
. 2022 Jun:139:110858.
doi: 10.1016/j.jbiomech.2021.110858. Epub 2021 Nov 19.

Corrigendum to "Bridging the gap between cadaveric and in vivo experiments: A biomechanical model evaluating thumb-tip endpoint forces" [J. Biomech. 46(5) (2013) 1014-1020]

Daniel C McFarland  1 , Sarah J Wohlman  2 , Wendy M Murray  3
Affiliations
Published Erratum

Corrigendum to "Bridging the gap between cadaveric and in vivo experiments: A biomechanical model evaluating thumb-tip endpoint forces" [J. Biomech. 46(5) (2013) 1014-1020]

Daniel C McFarland et al. J Biomech. 2022 Jun.
No abstract available

Keywords: Biological models; Computer simulation; Muscles; Thumb.

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Figures

Fig. 1.
Fig. 1.
Left panel is the flowchart from the original publication. The endpoint forces are assumed to be expressed in the Proximal Thumb frame when first calculated. Right panel demonstrates the correct final transformation that accounts for the transformation from Trapezium to tip.
Fig. 2.
Fig. 2.
Individual frames and transformations between Trapezium and Tip frame. Transformations from 1 to 2 (e.g.,[T(θ)]12). For all but the final transformation, the change in orientation between reference frames is related to a change in posture from neutral posture about the associated joint’s dof, θ. For the final transformation, [T(θPrincipal)]Distal_thumbTip, the change in orientation is associated with a static rotation that aligns the tip frame with the principal axes of the distal thumb body. The listed matrices are in the direction from Trapezium to Tip.
Fig. 3.
Fig. 3.
Thumb-tip endpoint forces in the proximal-palmar plane in lateral (top) and opposition pinch posture (bottom) for all intrinsic muscles. The grey region represents one standard deviation of both magnitude and direction of the experimental cadaver endpoint force data (Pearlman et al., 2004). The black arrow (lateral pinch, top) and open arrows (opposition pinch, bottom) represent the endpoint force generated using the muscle paths from the re-optimization. This figure show that the re-optimized muscle paths can still replicate the experimental cadaver endpoint force data (Pearlman et al., 2004) as Fig. 5 in the original paper; direct comparisons with the original results are not made, since the original results were reported relative to a different coordinate frame.
Fig. 4.
Fig. 4.
Moment arms generated from both the original muscle path optimization (black) and the re-optimization (white) versus literature moment arm values (Smutz et al., 1998) in lateral (left) and opposition pinch posture (right) for the three degrees of freedom the intrinsic muscles cross, CMC flexion/extension (top, flexion positive), CMC abduction/adduction (middle, adduction positive), and MCP flexion/extension (bottom, flexion positive). Experimental moment data (Smutz et al., 1998) are shown in grey. Error bars indicate ± standard deviation from the mean. OPP does not cross the MCP joint and therefore has no moment arm across MCP flexion. Overall moment arms were similar between the re-optimized muscle paths and the original muscle paths. This figure includes the original results from Fig. 4 in the published paper in black, with the results from the re-optimized muscle paths in white.
Fig. 5.
Fig. 5.
Force magnitudes produced in each of five force directions when the thumb was positioned in the lateral (left) and opposition (right) pinch posture, during coordinated muscle activation. Re-simulation results are indicated in black (lateral pinch, left), and white (opposition pinch, right). Experimental human subject data reported in Valero-Cuevas et al. (Valero-Cuevas et al., 2003) are shown in grey. Error bars indicate ± standard deviation from the mean. This figure shows that the combined muscle simulations with the re-optimized muscle paths can successfully replicate in vivo pinch force data as Fig. 5 in the original paper did; direct comparisons with the original results are not made, since the original results were reported relative to a different coordinate frame.
See this image and copyright information in PMC

Erratum for

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