Bruxism is mainly regulated centrally, not peripherally.

@article{Lobbezoo2001BruxismIM,
  title={Bruxism is mainly regulated centrally, not peripherally.},
  author={Frank Lobbezoo and Machiel Naeije},
  journal={Journal of oral rehabilitation},
  year={2001},
  volume={28 12},
  pages={
          1085-91
        }
}
Bruxism is a controversial phenomenon. Both its definition and the diagnostic procedure contribute to the fact that the literature about the aetiology of this disorder is difficult to interpret. There is, however, consensus about the multifactorial nature of the aetiology. Besides peripheral (morphological) factors, central (pathophysiological and psychological) factors can be distinguished. In the past, morphological factors, like occlusal discrepancies and the anatomy of the bony structures… 
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