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. 2018 Jul 3;12:436. doi: 10.3389/fnins.2018.00436

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Copyright © 2018 Moreno Catalá, Schroll, Laube and Arampatzis.

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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(A) Schematic figure of the custom-developed perturbation-system for the quick release experiment. (B) Spring model of the trunk with stiffness K, damping B, resting angle θ₀ (hypothetical resting angle of spring stiffness), trunk length L (measured from the L4/L5 to the T9 joints), gravitational trunk force F_g, and instantaneous angle of the trunk θ(t).