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. 2020 Oct 23;14:583579. doi: 10.3389/fnhum.2020.583579

Figure 1.

Figure 1

(A) Experimental setup. (B) Raw rectified electromyographic (EMG) activity from each of the muscles tested during 20% of maximal voluntary contraction (MVC) into elbow flexion (recording from the biceps brachii) and elbow extension (recording from the triceps brachii).