Comparative study of surface electromyography of masticatory muscles in patients with different types of bruxism

Figure 2 Comparison of the electromyography activity (mean ± SD) of the temporalis anterior and masseter muscle in the mandibular postural position and the intercuspal position maximal voluntary clenching. A: Comparison of the average electromyography amplitudes in the mandibular postural position and intercuspal position maximal voluntary clenching; B: Comparison of the normalized muscle activity ratio in the mandibular postural position; C: Comparison of the intercuspal position activity index. ^aComparison to the NB group, P < 0.05; ^bComparison to the CB group, P < 0.05. CB: Centric bruxism; ECB: Eccentric bruxism; NB: Non-bruxism; TA: Temporalis anterior; MM: Masseter muscle; NMA: Normalized muscle activity.