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 possible origin of habitual "be". Habitual be Habitual "be" is the use of an uninflected "be" in African American Vernacular English (AAVE) and Caribbean English to mark habitual or extended actions, in place of the Standard English inflected forms of "be", such as "is" and "are". In AAVE, use of "be" indicates that a subject repeatedly does an action or embodies a trait. In Standard English, the use of (an inflection of) "be" merely conveys that an individual has done an action in a particular tense, such as in the statement "She was singing" (the habitual being "she sings"). It