Teeth grinding occurs during which sleep stage?

Teeth grinding occurs during which sleep stage?

• A. N1
• B. N2
• C. N3
• D. REM

Answer: (B)

Teeth grinding is most often seen in light non-REM sleep, specifically during N2. This stage is characterized by brief arousals and transient bursts of muscle activity, including jaw clenching, as the brain intermittently shifts between wakefulness and deeper sleep. REM sleep, in contrast, involves muscle atonia that prevents most movement, so bruxism is unlikely there. Deep N3 sleep is dominated by slow waves and has little spontaneous movement, making jaw grinding even less likely. So the pattern fits N2 best because it’s the stage where brief arousals and associated jaw muscle activity commonly occur.

Teeth grinding is most often seen in light non-REM sleep, specifically during N2. This stage is characterized by brief arousals and transient bursts of muscle activity, including jaw clenching, as the brain intermittently shifts between wakefulness and deeper sleep. REM sleep, in contrast, involves muscle atonia that prevents most movement, so bruxism is unlikely there. Deep N3 sleep is dominated by slow waves and has little spontaneous movement, making jaw grinding even less likely. So the pattern fits N2 best because it’s the stage where brief arousals and associated jaw muscle activity commonly occur.