Bruxism "Bruxism is a repetitive jaw-muscle activity characterized by clenching or grinding of the teeth and/or by bracing or thrusting of the mandible. Bruxism has two distinct circadian manifestations: it can occur during sleep (indicated as sleep bruxism) or during wakefulness (indicated as awake bruxism)."All forms of bruxism entail forceful contact between the biting surfaces of the upper and lower teeth. In grinding and tapping this contact involves movement of the mandible and unpleasant sounds which can often awaken sleeping partners and even people asleep in adjacent rooms. Clenching (or clamping), on the other hand, involves inaudible, sustained, forceful tooth contact
Habitual be the introduction, and subsequent loss of habitual "do (be)" in America, which was also the problem with the first expansion of the diffusion hypothesis. Another hypothesis for the origins of habitual "be" in NWBE and afterwards into AAE is the most logical and the strongest of the lot. The decreolization theory for the emergence of habitual "be" in AAE is the most likely and most supported of the theories of its origin. It involves the decreolization process of Caribbean English creole, with the loss of "does (be)", which itself is a decreolization of a previous creole habitual marker and its