The Journal of Korean Physical Therapy

The Korean Society of Physical Therapy (대한물리치료학회)
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Comparison of the Muscle Activities of Upper Trapezius and Middle Deltoid between Subjects with and without Elevation of Shoulder Girdle during Arm Elevation

  • Weon, Jong-Hyuck (Department of Physical Therapy, College of Tourism & Health Science, Joongbu University) ;
  • Jung, Do-Young (Department of Physical Therapy, College of Tourism & Health Science, Joongbu University)
  • Received : 2012.11.15
  • Accepted : 2012.12.11
  • Published : 2012.12.25
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Abstract

Purpose: Muscle imbalance between upper trapezius (UT) and serratus anterior (SA) during arm elevation is a factor causing shoulder dysfunction. However, there is no study to compare the muscle activities of the UT and middle deltoid (MD). The purpose of this study was to compare the muscle activities of the UT and MD between with and without elevation of shoulder girdle (ESG) during shoulder abduction. Methods: The subjects without (control group=9) or with (ESG group=8) participated in this study. The muscle activities of the UT and MD were measured using a electromyography during $90^{\circ}$ shoulder abducted position in both group. The data in middle of 3-second of the 5-second periods were used. The mean value of three trials was used in the data analysis. For each muscle, independent t-tests were performed to compare for group differences. Results: The muscle activity of UT was significantly greater in ESG group, compared to that of the control group (p<0.05). The muscle activity of MD was significantly smaller in ESG group, compared to that of the control group (p<0.05). Conclusion: These findings showed that low muscle activation of MD as well as SA may contribute to hyperactivity of UT during arm elevation.

Keywords

References

  1. Ludewig PM, Cook TM, Nawoczenski DA. Three-dimensional scapular orientation and muscle activity at selected positions of humeral elevation. J Orthop Sports Phys Ther. 1996;24(2):57-65. https://doi.org/10.2519/jospt.1996.24.2.57
  2. Neumann DA. Kinesiology of the musculoskeletal system. 2nd ed. St. Louis, Mosby, 2010:147-56.
  3. Norkin CC, Levangie PK. Joint structure and function. Philadelphia, PA: FA Davis Co., 1992:66-8.
  4. Jobe FW, Pink M. Classification and treatment of shoulder dysfunction in the overhead athlete. J Orthop Sports Phys Ther. 1993;18(2):427-32. https://doi.org/10.2519/jospt.1993.18.2.427
  5. Ludewig PM, Cook TM. Alterations in shoulder kinematics and associated muscle activity in people with symptoms of shoulder impingement. Phys Ther. 2000;80(3):276-91.
  6. Lukasiewicz AC, McClure P, Michener L et al. Comparison of 3-dimensional scapular position and orientation between subjects with and without shoulder impingement. J Orthop Sports Phys Ther. 1999;29(10):574-83. https://doi.org/10.2519/jospt.1999.29.10.574
  7. Moseley JB Jr, Jobe FW, Pink M, Perry J, Tibone J. EMG analysis of the scapular muscles during a shoulder rehabilitation program. Am J Sports Med. 1992;20(2):128-34. https://doi.org/10.1177/036354659202000206
  8. Sahrmann S. Diagnosis and treatment of movement impairment syndromes. New York, Mosby, 2001:208-10.
  9. Park SK, Park JM, Lee JH. Effects of a push-up plus exercise program on scapular position and muscle activity in individuals with rounded shoulder posture. J Korean Soc Phys Ther. 2010;22(5):1-8.
  10. Jang KH, Choi JD, Lee MH et al. A comparison of modified sling exercise and general isometric exercise in patients with shoulder impingement syndrome. J Korean Soc Phys Ther. 2010;22(5):9-16.
  11. Payne LZ, Deng XH, Craig EV et al. The combined dynamic and static contributions to subacromial impingement. A biomechanical analysis. Am J Sports Med. 1997;25(6):801-8. https://doi.org/10.1177/036354659702500612
  12. Yoshizaki K, Hamada J, Tamai K et al. Analysis of the scapulohumeral rhythm and electromyography of the shoulder muscles during elevation and lowering: comparison of dominant and nondominant shoulders. J Shoulder Elbow Surg. 2009;18(5):756-63. https://doi.org/10.1016/j.jse.2009.02.021
  13. Cram JR, Kasman GS, Holtz J. Introduction to surface electromyography. 2nd ed. Ontario, Jones and Bartlett Publisher Inc., 2010:268-305.
  14. Reinold MM, Wilk KE, Fleisig GS et al. Electromyographic analysis of the rotator cuff and deltoid musculature during common shoulder external rotation exercises. J Orthop Sports Phys Ther. 2004;34(7):385-94. https://doi.org/10.2519/jospt.2004.34.7.385
  15. Cools AM, Witvrouw EE, Declercq GA et al. Evaluation of isokinetic force production and associated muscle activity in the scapular rotators during a protraction-retraction movement in overhead athletes with impingement symptoms. Br J Sports Med. 2004;38(1):64-8. https://doi.org/10.1136/bjsm.2003.004952
  16. Cools AM, Declercq GA, Cambier DC et al. Trapezius activity and intramuscular balance during isokinetic exercise in overhead athletes with impingement symptoms. Scand J Med Sci Sports. 2007;17:25-33.
  17. Weon JH, Oh JS, Cynn HS et al. Influence of forward head posture on scapular upward rotators during isometric shoulder flexion. J Bodyw Mov Ther. 2010;14:367-74. https://doi.org/10.1016/j.jbmt.2009.06.006
  18. Voerman GE, Vollenbroek-Hutten MM, Hermens HJ. Upper trapezius muscle activation patterns in neck-shoulder pain patients and healthy controls. Eur J Appl Physiol. 2007;102(1):1-9. https://doi.org/10.1007/s00421-006-0215-8
  19. Antony NT, Keir PJ. Effects of posture, movement and hand load on shoulder muscle activity. J Electromyogr Kinesiol. 2010;20(2):191-8. https://doi.org/10.1016/j.jelekin.2009.04.010
  20. Ebaugh DD, McClure PW, Karduna AR. Three-dimensional scapulothoracic motion during active and passive arm elevation. Clin Biomech (Bristol, Avon). 2005;20(7):700-9. https://doi.org/10.1016/j.clinbiomech.2005.03.008
  21. Kaur H, Harjeet SD, Jit I. Length and curves of the clavicle in northwest Indians. J Anat Soc India Voll. 2002;51(2):199-209.
  22. Weon JH, Kwon OY, Cynn HS et al. Real-time visual feedback can be used to activate scapular upward rotators in people with scapular winging: an experimental study. J Physiother. 2011;57(2): 101-7. https://doi.org/10.1016/S1836-9553(11)70020-0