Análise electromiográfica do músculo masséter em indivíduos portadores da Síndrome de Down
Electromyograpidc analysis of the masseter muscle in persons with down's syndrome
Niccoli Filho, W.D.; Vitti, M.; Moraes, F.M.D.
Rev. odontol. UNESP, vol.18, nÚnico, p.293-304, 1989
Resumo
Foram analisados eletromiograficamente os músculos masséter direito e esquerdo em 15 indivíduos portadores da Síndrome de Down, em vários movimentos mandibulares, e comparados os resultados com aqueles de indivíduos normais. Os dados obtidos demonstraram que: 1) nos movimentos de abertura da boca, propulsão, lateralidade direita e esquerda da mandíbula não houve diferenças significantes nos resultados eletromiográficos entre indivíduos normais e os portadores da Síndrome de Down; 2) nos movimentos de mastigação molar direita e esquerda, incisiva e oclusão cêntrica forçada houve redução dos potenciais eletromiográficos para indivíduos portadores da Síndrome de Down, quando comparados aos indivíduos normais; 3) o padrão de coordenação dos indivíduos portadores da Síndrome de Down foi diferente daquele observado em indivíduos normais; 4) a "hipotonia" presente nos indivíduos portadores da Síndrome de Down pode ser detectada pelo exame eletromiográfico.
Palavras-chave
Electromiografia, músculo masséter, Síndrome de Down, hipotonia
Abstract
An electromyographic study of the right and left masseter muscles, in various mandibular movements, was performed on 15 individuals with Down's syndrome. The results were compared with those got from the same movements in normal individuals. The data showed that: (1) significant differences were not seen in the following movements: right lateral, left lateral, protrusion, and opening of the mouth; (2) the individuals with Down's syndrome showed a decrease in the electromyographic potentials during right and left molar mastication, incisor mastication and forced centric occlusion; (3) the muscular coordination pattern in the mongolic individuals was different from the normal subjects; (4) this study also shows that a general muscular hypotony, in individuals with Down's syndrome, can be detected by electromyography.
Keywords
Electromyography, masseter muscle, Down's syndrome, hypotony
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