Figure 1. Group mean activities and standard errors (N = 32) of digastric muscles and of the masseter (upper graph) and temporalis muscles (lower graph) in the different motor tasks. The digastric activities appear twice in the upper and lower graphs. Working- and balancing-side activities are connected for the sake of clarity. Abbreviations: mass = masseter, temp = temporalis, ws = working side, bs = balancing side.

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