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척주 기립자세와 굽힌자세에서 어깨관절 외전각도 변화에 따른 어깨뼈 주위 근 활성도 분석 KCI 등재

Analysis of Muscle Activity of the Scapular Rotators With Changes of Shoulder Abduction Angle in Both Erect and Slouched Trunk Position

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한국전문물리치료학회지 (Physical Therapy Korea)
한국전문물리치료학회 (Korean Research Society of Physical Therapy)
초록

Altered scapular kinematics in the scapular joint is commonly believed to be a factor contributing to trunk posture. The purpose of this study was to analyze the muscle activity with several changes of the shoulder angle. Tests were performed on 10 male subjects by repeated measures. Each subject was measured while sitting in both erect and slouched trunk positions. In each sitting posture, a three-dimensional motion analysis measurement was used to measure thoracic angle and shoulder abduction angle. Measurements were taken with the shoulder abdcution angle at , , , , , and . By using surface Electromyography (EMG) electrodes, we recorded the activity of the upper trapezius, middle trapezius, lower trapezius, middle deltoid, and serratus anterior muscle while the subject held a 4 kg weight at each angle. The mean of root mean square (RMS) of EMG activity was calculated. The middle trapezius, lower trapezius, and middle deltoid muscle activity showed significantly higher results but serratus anterior muscle activity showed significantly lower results (p<.05). With the shoulder angle increased, the muscle activity was also significantly increased (p<.05). In conclusion, the thoracic spine posture significantly affects the scapular muscle during scapular plane abduction, and the slouched posture is associated with increased trapezius muscle activity and with decreased serratus anterior muscle activity.

저자
  • 김덕화(연세대학교 대학원 재활학과) | Kim Duck-hwa 통신저자
  • 최종덕(연세대학교 대학원 재활학과) | Choi Jong-duk
  • 오재섭(연세대학교 대학원 재활학과) | Oh Jae-seop