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]

A Musculoskeletal Model of the Hand and Wrist Capable of Simulating Functional Tasks

“…Simulated pinch strength only increased slightly (~5N) and muscle coordination patterns did not change considerably when the restraint on pinch force direction was removed from our optimization. While the simulations presented here do not explain why the model is weaker than normative pinch strength, to our knowledge, no prior simulation study [1,9,10,65,69] has been able to replicate the pinch forces magnitudes reported in normative studies of adults. Additional experimental and simulation work will be required to understand why pinch simulations remain weaker than normative pinch strength.…”

“…Thus, to estimate maximum pinch force, we prescribed force in increasing 10N intervals, and interpreted a threshold force, beyond which the algorithm failed to identify muscle coordination patterns that produced greater forces, as an indicator of maximum strength. To predict maximal fingertip or pinch strength, other studies have used forward simulations; however, these simulations occurred in a mechanically static framework [9,10,42,69]. For example, we previously replicated the methods of [9], to simulate lateral pinch with the same thumb model used here in a different computational environment [10,69].…”

“…To predict maximal fingertip or pinch strength, other studies have used forward simulations; however, these simulations occurred in a mechanically static framework [9,10,42,69]. For example, we previously replicated the methods of [9], to simulate lateral pinch with the same thumb model used here in a different computational environment [10,69]. In this previous work, forward solutions were computed for the model in a prescribed, specific, static joint posture.…”

“…As noted in our previous publication [69], the choice of reference frame and how to replicate specific experimental conditions in simulations is not a trivial detail and can impact the interpretation of results (see discussion in [69]). We have previously successfully replicated the experiments (including the reference frame and all constraints) from [9], with the same thumb model implemented in a different computational environment [10,69]. Here, we simulated pinch strength relative to the global frame.…”