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Table 1 Distribution of muscle activity (%MVC) in different types of sleep bruxism

From: Identification of the occurrence and pattern of masseter muscle activities during sleep using EMG and accelerometer systems

  Muscle activity (%MVC)
  Mean s.d. Min-Max (%)
Grinding 32.8 37.7 3.3 – 115 (59.5)
Clenching 19.7 23.4 0.3 – 106 (35.6)
Tapping 2.6 3.4 0.3 – 15.5 (4.9)
Total 55.1 58.4   (100)