Diagnosis

Because only 20% of bruxist episodes are accompanied by noise, the majority of bruxists are unaware of their bruxing. Wear patterns on the teeth, tooth mobility, and fracture cusps suggest bruxing activity. Other individuals come to medical attention because of muscle or joint pain, fatigue, stiffness on waking, or headaches. The rhythmic myogenic artifact resulting from bruxism appearing on a polysomnogram has a characteristic appearance (Fig. 12.2).

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FIGURE 12.2 Chewing movements produced by bruxism cause rhythmic activity with superimposed myogenic artifact in the EEG channels, bearing a superficial resemblance to generalized spike-wave discharges. (From Malow B. A., and Aldrich, M. S. (2000). Neurological Monitoring Techniques, In Principles and Practice of Sleep Medicine, 3rd ed., M. H. Kryger, T. Roth, and W. C. Dement, eds., Philadelphia: W.B. Saunders, reproduced with permission.)

FIGURE 12.2 Chewing movements produced by bruxism cause rhythmic activity with superimposed myogenic artifact in the EEG channels, bearing a superficial resemblance to generalized spike-wave discharges. (From Malow B. A., and Aldrich, M. S. (2000). Neurological Monitoring Techniques, In Principles and Practice of Sleep Medicine, 3rd ed., M. H. Kryger, T. Roth, and W. C. Dement, eds., Philadelphia: W.B. Saunders, reproduced with permission.)

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