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. 2019 Nov 5;13:90. doi: 10.3389/fnbot.2019.00090

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Copyright © 2019 Seth, Dong, Matias and Delp.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Shoulder model muscle activations for primary muscles used to elevate the humerus during the (A) flexion and (B) abduction tasks with a 2 kg hand-held mass. Simulated muscle activations (red, ±1 SD shaded) compared to EMG (gray shaded).