Bruxism bruxism), but also possibly grinding, and is often associated with other semivoluntary oral habits such as cheek biting, nail biting, chewing on a pen or pencil absent mindedly, or tongue thrusting (where the tongue is pushed against the front teeth forcefully). There is evidence that sleep bruxism is caused by mechanisms related to the central nervous system, involving sleep arousal and neurotransmitter abnormalities. Underlying these factors may be psychosocial factors including daytime stress which is disrupting peaceful sleep. Sleep bruxism is mainly characterized by "rhythmic masticatory muscle activity" (RMMA) at a frequency of about once per second, and also with
The Grinding Wheel liner notes. Overkill Session members Production Artwork and design The Grinding Wheel The Grinding Wheel is the 18th studio album by American thrash metal band Overkill, released on February 10, 2017. It is the last Overkill album with drummer Ron Lipnicki, who left the band shortly after its release and was replaced by Jason Bittner (formerly of Shadows Fall and Flotsam and Jetsam) for the album's tour and its follow-up "The Wings of War" (2019). Vocalist Bobby "Blitz" Ellsworth said about the album's style: "At the end of the day Overkill is Overkill. Our trademark is that we are always