| Autor: |
Po, Jessica M. C., Gallo, Luigi M., Michelotti, Ambra, Farella, Mauro |
| Předmět: |
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| Zdroj: |
Journal of Sleep Research; Oct2013, Vol. 22 Issue 5, p593-599, 7p |
| Abstrakt: |
The masticatory central pattern generator ( CPG) may be implicated in the pathophysiology of sleep bruxism ( SB). The aim of this study was to compare rhythmic masticatory muscle activity ( RMMA) occurring during sleep related to SB with that of natural voluntary chewing in a sample of sleep bruxers. It was hypothesized that the pace of RMMA during sleep is correlated with the chewing pace. Electromyographic ( EMG) surface activity was recorded unilaterally from the masseter muscle of 13 participants diagnosed with SB (mean age ± standard deviation =26.1 ± 9.0 years) by means of portable recorders. For each participant, recordings were carried out in the natural environment setting, always including the dinner time and the entire sleeping period. The time-frequency features of RMMA episodes were extracted automatically offline using a previously validated algorithm. Comparisons between chewing and SB activity indicated that chewing RMMA episodes almost doubled sleep RMMA in duration and power. The mean frequency of SB episodes was 1.0 ± 0.3 Hz, whereas the mean frequency of chewing episodes was 1.5 ± 0.4 Hz. The pace of SB and that of chewing were not correlated significantly ( R = −0.13; P = 0.96). We conclude that sleep RMMA is not related to that of chewing. Despite both activities being accompanied by rhythmic jaw contractions, the pace-generating mechanism of SB may be independent from that of chewing. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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