胸郭側方偏位量と大腰筋断面積左右比の関係

Abstract

This study investigated the relationships among the lateral deviation of the thorax, crosssectional area of the psoas major muscle, and left-right asymmetry of the pelvic rotation angle. [Participants and Methods] The participants were 17 healthy males. The cross-sectional area of the psoas major muscle and change in pelvic rotation angle during isometric hip flexion were measured. [Results] The cross-sectional area of the psoas major muscle was significantly larger on the right and the change in the pelvic rotation angle to the ipsilateral side was significantly larger on the left. Furthermore, there was a significant negative correlation of the amount of lateral deviation of the thorax with the ratio of the left and right psoas major muscle cross-sectional areas, and a significant positive correlation with the ratio of the left and right pelvic rotation angles. [Conclusion] The results suggest that it is important to assess lateral deviation of the thorax in the upright position to evaluate changes in the cross-sectional area of the psoas major muscle during isometric hip flexion.

Relationship between the thoracic asymmetry in standing position and the asymmetry of ankle moment in the frontal plane during gait

“…Homma et al 2 ) and Sano et al. 3 ) also found a significant correlation between the TLD and the asymmetry in the cross-sectional area of the quadratus lumborum and the psoas major. These previous studies suggested that thoracic asymmetry (the TLD and asymmetry of the thoracic shape) causes impaired respiration and motor function by causing asymmetry in the local muscle activity of the trunk.…”

“…Based on a significant correlation between the asymmetry of the thoracic shape and respiratory function, Hirayama et al 1) suggested that the greater the asymmetry of the thoracic shape, the lower the respiratory function. Homma et al 2) and Sano et al 3) also found a significant correlation between the TLD and the asymmetry in the cross-sectional area of the quadratus lumborum and the psoas major. These previous studies suggested that thoracic asymmetry (the TLD and asymmetry of the thoracic shape) causes impaired respiration and motor function by causing asymmetry in the local muscle activity of the trunk.…”

“…Based on previous studies [1][2][3][4] , we expect that thoracic asymmetry causes asymmetry of the IAMF during gait. Although it is necessary to collect data on the disease to apply this hypothesis to clinical practice, it is expected that many factors, such as pain and deformity, may affect the disease outcome.…”

“…Thoracic movement is composed of rib and the thoracic spine movements, which perform important roles in the respiration and postural stability. In recent years, several studies have focused on the thoracic lateral deviation (TLD) and asymmetry of the thoracic shape in the resting position and investigated their relationship with physical function 1 , 2 , 3 , 4 ) . Based on a significant correlation between the asymmetry of the thoracic shape and respiratory function, Hirayama et al 1 ) suggested that the greater the asymmetry of the thoracic shape, the lower the respiratory function.…”

“…These previous studies suggested that thoracic asymmetry (the TLD and asymmetry of the thoracic shape) causes impaired respiration and motor function by causing asymmetry in the local muscle activity of the trunk. Although these studies 1 , 2 , 3 ) investigated static tasks such as forced breathing and supine motions, another study 4 ) that focused on gait and investigated the relationship between thoracic asymmetry and the asymmetry of lower extremity movements. We previously reported that the TLD and asymmetry of the thoracic shape in standing position were significantly correlated with the asymmetry of the lateral tilt angle of the shank during gait 4 ) .…”