Journal of the Korean Academy of Clinical Electrophysiology (대한임상전기생리학회지)

The Korean Academy of Clinical Electrophysiology (대한임상전기생리학회)
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Correlation between Cervicothoracic Posture and Scapular Kinematic and Muscle Activity during Shoulder Abduction

목등 자세와 어깨 관절 벌림 동안 어깨뼈 운동 및 근활성도 간의 상관관계 분석

  • Han, Song-E (Department of Physical Therapy, Chonnam Juong-ang Hospital) ;
  • Park, Seung-Kyu (Department of Physical Therapy, College of Health Science, Sehan University)
  • 한송이 (전남중앙병원 물리치료실) ;
  • 박승규 (세한대학교 보건대학 물리치료학과)
  • Received : 2012.10.31
  • Accepted : 2012.12.04
  • Published : 2012.12.31
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Abstract

Purpose : Purpose of this study was to investigate whether cervicothoracic posture was associated with scapula orientation and muscle activity during shoulder abduction. Methods : Cervicothoracic junction angle and thoracic kyphosis angle were measured in health twenty subjects. Then, scapular resting orientation and range of motion (upward/downward rotation, internal/external rotation) and muscle activity (upper trapezius, lower trapezius, serratus anterior) was determined using motion capture system and surface electromyography while subjects performed shoulder abduction. Results : Cervicothoracic junction angle was significantly associated with range of motion of scapular internal/external rotation during shoulder abduction. Thoracic kyphosis angle was significantly associated with scapular resting orientation of upward/downward rotation and average IEMG of lower trapezius. Conclusion : The result of this study shows that poor cervicothoracic posture is relationship with altered scapular kinematics cause of shoulder dysfunction. These findings suggested that cervicothoracic posture may be considered in occupation and exercise including arm elevation over head as well as used as predict factor to estimate shoulder dysfunction.

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References

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