Abstract
In this thesis, the problem of a patient with dystonia of the trunk who was admitted with excessive rotation to the other side and lateral bending to the same side of the upper trunk in both stance phases was examined. It was clarified that lower muscle activity of the both oblique abdominus was the primary disturbance and excessive muscle activity of the back-muscles of the swing phase was a secondary one. The effect before and after one treatment was examined by electromyography evaluation. As a result, a therapautic approach for not only the primary disturbance but also the secondary one was important. Furthermore, it was suggested that the specific of a secondary disturbance based on a detailed motion analysis and a grasp of the relation between primary and secondary disturbances were effective in patients with dystonia of the trunk.