title: Nocturnal masseter muscle activity and urinary catecholamine levels in bruxers.
abstract: Nocturnal electromyographic recordings of masseter muscle activity were performed on 20 bruxist and ten control subjects. Each subject collected two 24-hour urine samples. An analysis of urinary catecholamine content was performed. A positive relationship was found between increased epinephrine content and high levels of nocturnal masseter muscle activity.
mesh_terms: D002012:Bruxism / Q000503:physiopathology* / Q000652:urine; D004576:Electromyography / Q000379:methods; D004837:Epinephrine / Q000652:urine*; D006801:Humans; D008406:Masseter Muscle / Q000502:physiology*; D008410:Masticatory Muscles / Q000502:physiology*; D009119:Muscle Contraction; D009638:Norepinephrine / Q000652:urine*; D012890:Sleep / Q000502:physiology*
chemical_list: D009638:Norepinephrine; D004837:Epinephrine