Avaliação eletromiografica dos musculos temporal e masseter durante fadiga induzida por mastigação prolongada

AUTOR(ES)
DATA DE PUBLICAÇÃO

1999

RESUMO

The aim of this study was to evaluate the electromyographic changes in the anterior temporalis and masseter muscles after fatigue induced by continuous chewing. Surface electrodes were placed bilaterally over the anterior temporalis and masseter muscles of 31 subjects with normal dentition. Recordings were taken every minute from the beginning of chewing to the exact moment the volunteer reported subjective sensation of fatigue in the jaw muscles. The length of endurance period (fatigue threshold) was measured to each subject, as well as the average amplitude and duration of activation phase and duration of relaxation phase through electromyographic recording af each muscle. The average endurance period was about 500s. No significant change occurred on the average amplitude of activation phase meanwhile the duration ofboth the activation and relaxation phase diminished after fatigue

ASSUNTO(S)

mastigação musculos fadiga eletromiografia

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