Glossary of psychiatry occurs within 2–3 months. Brain fag syndrome is an example of a culture-bound syndrome. "Brain fag" was once a common term for mental exhaustion. Today, the syndrome describes students (predominantly males, particularly in West Africa) experiencing symptoms including somatic, sleep-related and cognitive complaints, head and neck pains, difficulty in concentrating and retaining information, and eye pain. Brain fog is another term for #Clouding of consciousness. Bruxism refers to teeth grinding behaviour that is usually seen in children. In Capgras syndrome, the patient feels that a person familiar to him, usually a family member has been replaced by an imposter. This
Bruxism then observed high levels of bruxism-like muscular activity in rats that were allowed to watch this treatment compared to rats that did not see it. They proposed that the rats who witnessed the electrical shocking of other rats were under emotional stress which may have caused the bruxism-like behavior. Some research suggests that there may be a degree of inherited susceptibility to develop sleep bruxism. 21–50% of people with sleep bruxism have a direct family member who had sleep bruxism during childhood, suggesting that there are genetic factors involved, although no genetic markers have yet been identified. Offspring of people