Bruxism occasional tooth grinding. It has been shown that the majority (86%) of sleep bruxism episodes occur during periods of sleep arousal. One study reported that sleep arousals which were experimentally induced with sensory stimulation in sleeping bruxists triggered episodes of sleep bruxism. Sleep arousals are a sudden change in the depth of the sleep stage, and may also be accompanied by increased heart rate, respiratory changes and muscular activity, such as leg movements. Initial reports have suggested that episodes of sleep bruxism may be accompanied by gastroesophageal reflux, decreased esophageal pH (acidity), swallowing, and decreased salivary flow. Another report suggested
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