Estudo eletromiográfico dos Mm. multífidos na coluna lombar e torácica durante a fase de apoio da marcha / Electromyographic study of the multifidus in the lumbar and thoracic spine during the stance phase

ABSTRACT

The airn of this study was to analyze multifidus muscles, since they are related to several disorders of the spine. The electromyographic study reveals that multifidus muscles in the lumbar and thoracic spine present a simultaneous activity on the right and left sides of the spine during the stance phase. Nevertheless, the coefficient of variation shows that less variation occurs in the lumbar muscles ipsilateral to the lower limb of the stance, and in the thoracic muscles contralateral to the stance limb. Our results suggest that multifidus muscles play a stabilizing role and are also related to spine rotation.