A) Step responses from descending neural drive to joint displacement (i.e., response in due to step in ), with equal time and joint-displacement ranges (on the horizontal and vertical axes, respectively) for all subplots.

<p>The very large step responses in SAA (~20 rad, subplot A) are caused by large inputs (100% MVC), large maximum muscle forces and moment arms in Delt Lat and Pec Maj, and low joint stiffness in SAA. In actuality, tremorogenic inputs are on the order of 5-10% MVC, so responses would be scaled...

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Main Author: Ian Syndergaard (21627500) (author)
Other Authors: Daniel B. Free (21627503) (author), Dario Farina (292195) (author), Steven K. Charles (21627506) (author)
Published: 2025
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Summary:<p>The very large step responses in SAA (~20 rad, subplot A) are caused by large inputs (100% MVC), large maximum muscle forces and moment arms in Delt Lat and Pec Maj, and low joint stiffness in SAA. In actuality, tremorogenic inputs are on the order of 5-10% MVC, so responses would be scaled by 0.05-0.1, and joint stiffness increases significantly toward the ends of joint ranges of motion, further reducing motion amplitude. B) Same as A, but zoomed in, such that each subplot has its own distinct joint-displacement range (along the vertical axis).</p>