[Electroencephalographic study of bruxers during sleep].

A whole night recording of EEG, EMG and EOG of 7 bruxers during sleep with S-EEG equipment is made. Two of them have been evaluated after splint therapy. After analysing the sleep architecture, sleep progress and sleep index, it is found that: (1) S2 period is shorter, REM period is longer and the REM percentage is higher in comparison with the control group; (2) The total teeth grinding period is 213-691 secs and the frequency is 24-70 times per night, the occurrence of teeth grinding is scattered in different sleep stages; (3) The frequency and period of teeth grinding are decreased significantly after splint therapy; and (4) The occurrence of teeth grinding is a kind of functional disturbance of central nervous system rather than. The aroused response or transfer of sleep stages.