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. 2014 Apr 7;11:50. doi: 10.1186/1743-0003-11-50

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Copyright © 2014 Chen et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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EMG responses in four types of perturbation. Averaged EMG responses of three trials of ten muscles for one representative subject in response to four types of perturbation. The vertical dotted line indicates the beginning of platform movement. NK EXT, cervical paraspinae; NK FLX, neck flexor; T EXT, thoracic paraspinae; PEC, pectoralis major; L EXT, lumbar paraspinae; ABD R, abdominal rectus; BF, biceps femoris; RF, rectus femoris; MG, medial gastrocnemius; TA, tibialis anterior; BT, backward translation, FT, forward translation, DR, toe down rotation; UR, toe up rotation.