Sleep bruxism: jaw-muscle activity during sleep
Sleep bruxism is rhythmic or non-rhythmic masticatory muscle activity during sleep. Jaw soreness or tooth wear alone cannot determine its sleep stage or cause.
ESTABLISHED
Sleep bruxism is masticatory muscle activity during sleep that can be rhythmic or non-rhythmic. Current consensus treats bruxism as a behavior that may have clinical consequences rather than automatically as a disease in every person.
SUPPORTED HYPOTHESIS
Self-report, examination, and device-based measurements can contribute different levels of information about bruxism. Instrumental recordings provide stronger evidence about sleep-related muscle activity than symptoms alone.
What this cannot tell you
Morning jaw tension, tooth wear, or a report of grinding cannot by themselves identify the sleep stage, demonstrate a dopamine-driven mechanism, or establish why the activity occurred.
What you can actually observe
- Whether grinding sounds are reported during sleep
- Morning jaw-muscle fatigue, pain, or stiffness
- Tooth wear, fractures, or dental damage
- How frequently the behavior is noticed
- Whether snoring or other sleep symptoms coexist
Safety boundary
Persistent jaw pain, tooth damage, headaches, jaw locking, or suspected sleep-disordered breathing should be discussed with an appropriate dental or medical professional.
Sources
Use these observations as context in Lab Search
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