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. Author manuscript; available in PMC: 2011 May 1.
Published in final edited form as: Pain. 2010 Mar 5;149(2):284–295. doi: 10.1016/j.pain.2010.02.022

Fig. 1.

Fig. 1

Force and displacement during eccentric contraction of the masseter muscle. Upper trace shows typical torque developed during EC of the masseter muscle. Lower trace shows mandibular displacement during the EC. Note that the muscle is pre-activated (arrow) prior to muscle displacement (i.e. jaw opening).