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A Comparison of EMG Activity for Middle and Lower Trapezius Muscle According to Shoulder Abduction Angles  

Lee, Won-Hwee (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University)
Ha, Sung-Min (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University)
Park, Kyue-Nam (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University)
Kim, Su-Jung (Dept. of Rehabilitation Therapy, The Graduate School, Yonsei University)
Weon, Jong-Hyuk (Dept. of Rehabilitation Medicine, Wonju Christian Hospital, Yonsei University)
Choi, Houng-Sik (Dept. of Physical Therapy, Hanseo University)
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Physical Therapy Korea / v.18, no.1, 2011 , pp. 47-56 More about this Journal
The purpose of this study was to compare electromyography (EMG) activity for the middle and lower trapezius muscle according to various shoulder abduction angles. Thirty healthy male subjects were recruited for this study. Each subject performed three repetitions of horizontal abduction at $75^{\circ}$, $90^{\circ}$, $125^{\circ}$, $160^{\circ}$, and $180^{\circ}$ of shoulder abduction angle in a prone position. Surface EMG activity was recorded from the middle and lower trapezius while the subjects held for five seconds at a predetermined position. The EMG activity was normalized using the maximal voluntary isometric contraction (MVIC) elicited using a manual muscle testing technique. A repeatedly measured ANOVA was performed by Bonferroni's post hoc test. The EMG activity of the middle and lower trapezius was significantly different among shoulder abduction angles (p<.05). The greatest level of muscle activity for the middle and lower trapezius were demonstrated at $90^{\circ}$ and $160^{\circ}$ of shoulder abduction angle, respectively. These results suggest that middle and lower trapezius strengthening exercise and manual muscle testing should be performed at different shoulder abduction angles.
Electromyography; Lower trapezius muscle; Middle trapezius muscle;
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1 Sahrmann SA. Diagnosis and Treatment of Movement Impairment Syndromes. St. Louis, Mosby Inc., 2002.
2 Tucker WS, Armstrong CW, Gribble PA, et al. Scapular muscle activity in overhead athletes with symptoms of secondary shoulder impingement during closed chain exercises. Arch Phys Med Rehabil. 2010;91(4):550-556.   DOI   ScienceOn
3 Wise MB, Uhl TL, Mattacola CG, et al. The effect of limb support on muscle activation during shoulder exercises. J Shoulder Elbow Surg. 2004;13(6):614-620.   DOI   ScienceOn
4 Arlotta M, Lovasco G, McLean L. Selective recruitment of the lower fibers of the trapezius muscle. J Electromyogr Kinesiol. 2010;6.
5 Ballantyne BT, O'Hare SJ, Paschall JL, et al. Electromyographic activity of selected shoulder muscles in commonly used therapeutic exercises. Phys Ther. 1993;73(10):668-677.   DOI
6 Bentman S, O'Sullivan C, Stokes M. Thickness of the middle trapezius muscle measured by rehabilitative ultrasound imaging: Description of the technique and reliability study. Clin Physiol Funct Imaging. 2010;30(6):426-431.   DOI   ScienceOn
7 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):64-68.   DOI   ScienceOn
8 Borstad JD, Ludewig PM. Comparison of scapular kinematics between elevation and lowering of the arm in the scapular plane. Clin Biomech (Bristol, Avon). 2002;17(9-10):650-659.   DOI   ScienceOn
9 Chester R, Smith TO, Hooper L, et al. The impact of subacromial impingement syndrome on muscle activity patterns of the shoulder complex: A systematic review of electromyographic studies. BMC Musculoskelet Disord. 2010;9(11);45.
10 Cools AM, Declercq GA, Cambier DC, et al. Trapezius activity and intramscular balance during isokinetic exercise in overhead athletes with impingement symptoms. Scand J Med Sci Sports. 2007;17(1):25-33.
11 Cools AM, Witvrouw EE, Declercq GA, et al. Scapular muscle recruitment patterns: Trapezius muscle latency with and without impingement symptoms. Am J Sports Med. 2003;31(4):542-549.   DOI
12 Cram JR, Kasman GS, Holtz J. Introduction to Surface Electromyography. Maryland. Aspen, 1998.
13 De Mey K, Cagnie B, Danneels LA, et al. Trapezius muscle timing during selected shoulder rehabilitation exercises. J Orthop Sports Phys Ther. 2009;39(10):743-752.   DOI
14 Ebaugh DD, Spinelli BA. Scapulothoracic motion and muscle activity during the raising and lowering phases of an overhead reaching task. J Electromyogr Kinesiol. 2010;20(2):199-205.   DOI   ScienceOn
15 Ekstrom RA, Donatelli RA, Soderberg GL. Surface electromyographic analysis of exercises for the trapezius and serrratus anterior muscles. J Orthop Sports Phys Ther. 2003;33(5):247-258.   DOI
16 Ekstrom RA, Soderberg GL, Donatelli RA. Normalization procedures using maximum voluntary isometric contractions for the serratus anterior and trapezius muscles during surface EMG analysis. J Electromyogr Kinesiol. 2005;15(4):418-428.   DOI   ScienceOn
17 Faria CD, Teixeira-Salmela LF, Gomes PF. Applicability of the coactivation method in assessing synergies of the scapular stabilizing muscles. J Shoulder Elbow Surg. 2009;18(5):764-772.   DOI   ScienceOn
18 Johnson GR, Pandyan AD. The activity in the three regions of the trapezius under controlled loading conditions-An experimental and modelling study. Clin Biomech (Bristol, Avon). 2005;20(2):155-161.   DOI   ScienceOn
19 Forte FC, de Castro MP, de Toledo JM, et al. Scapular kinematics and scapulohumeral rhythm during resisted shoulder abduction-implications for clinical practice. Phys Ther Sport. 2009 Aug;10(3):105-111.   DOI   ScienceOn
20 Hislop HJ, Montgomery J. Daniels and Worthingham's Muscle testing: Techniques of manual examination. Philadelphia PA, Saunders, 2002.
21 Kendall F, McCreary E, Provance P, et al. Muscles testing and function with posture and pain. 5th ed. Baltimore, Lippincott Williams & Wilkins, 2005.
22 Kinney E, Wusthoff J, Zyck A, et al. Activation of the trapezius muscle during varied forms of Kendall exercises. Phys Ther Sport. 2008;9(1):3-8.   DOI   ScienceOn
23 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.   DOI
24 Matsuki K, Matsuki KO, Mu S, et al. In vivo 3-dimensional analysis of scapular kinematics: Comparison of dominant and nondominant shoulders. J Shoulder Elbow Surg. 2010.
25 McMahon PJ, Jobe FW, Pink MM, et al. Comparative electromyographic analysis of shoulder muscles during planar motions: Anterior glenohumeral instability versus normal. J Shoulder Elbow Surg. 1996:5(2 Pt 1):118-123.   DOI
26 Moseley JB Jr, Jobe FW, Pink M, et al. EMG analysis of the scapular muscles during a shoulder rehabilitation program. Am J Sports Med. 1992;20(2):128-134.   DOI   ScienceOn
27 Neumann DA. Kinesiology of the Musculoskeletal System: Foundations for physical rehabilitation. 1st ed St. Louis, Mosby, 2002.
28 Palmer ML, Epler ME. Clinical Assessment Procedures in Physical Therapy. Philadelphia, Lippincott, 1990.
29 Rundquist PJ, Obrecht C, Woodruff L. Three-dimensional shoulder kinematics to complete activities of daily living. Am J Phys Med Rehabil. 2009;88(8):623-629.   DOI   ScienceOn