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Task-dependence of Jaw Elevator and Depressor Co-activation

Department of Prosthodontics, University Dental Clinic, University of Erlangen-Nürnberg, Glückstrasse 11, D 91054 Erlangen, Germany;

View larger version (24K): [in a new window]   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.

View larger version (14K): [in a new window]   Figure 2. Mean digastric activities and standard errors (N = 32) in different phases of the chewing and unilateral biting cycles. "Minimum" and "maximum" denote the means of the smallest or highest activity within a chewing or clenching cycle, respectively.