عنوان مقاله [English]
Background and Aim: The objective of this study was to compare the shoulder muscle activation during upper arm elevation in scaption and frontal planes under different speed and loading conditions. Materials and Methods: Sixteen females (20-28 years old) were studied. A surface EMG system (MA300-16) was used to record the activity of shoulder muscles including anterior, medial, and posterior deltoid, supraspinatus as well as the upper, middle, and lower trapezius muscles during upper arm elevation in scaption and frontal planes. Tasks were repeated in slow and fast speed with and without load (5% of body mass). Under SPSS-22 environment, repeated measure ANOVA was used for statistics analysis with the significance level of pResults: In condition intraction between muscle, speed, load, plane motion factors was not effect significant (P=0.06). The activation levels of anterior, medial, and posterior deltoid, supraspinatus, upper, middle, and lower trapezius muscles in frontal plane were %53, %68, %73 ,%55, %58, %33, and %51 respectively. These values for shoulder elevation in scaption plane were %43, %73, %96, %67, %69, %43 and %62 respectively. In total, the muscle activity in frontal plane was 0.16 times more than that in scaption plane (P=0.0001). The total mean of muscle activitiesin fast motionswas about 0.11% higher than that in slower speed motions (P=0.0001). Also, with load, the muscle activity was 1.52 times more than that in without load condition (P=0.0001). Conclusion: The muscle activity pattern of the arm elevation in frontal plane is different from that in scaption plane by means of higher activation in the frontal plane. In upper limb elevation, posterior deltoid muscle displayed higher activity than the other deltoid portions. Middle trapezious and anterior deltoid muscles had the least activity in upper arm elevation. Increasing the speed and load affected the activity of the posterior deltoid more than the other muscles.
Alqunaee, M., Galvin, R., & Fahey, T. (2012). Diagnostic accuracy of clinical tests for subacromial impingement syndrome: a systematic review and meta-analysis. Archives of Physical Medicine and Rehabilitation, 93(2), 229-236.
Antony, N. T., & Keir, P. J. (2010). Effects of posture, movement and hand load on shoulder muscle activity. Journal of Electromyography and Kinesiology, 20(2), 191-198.
Baraz, M., & Farahpour, N. (2011). The function of the electromyography shoulder muscles in different position. M.SC Thesis, Facultyof Sport Sciences, Bu Ali Sina university. [Persion]
De Groot, J. H., Rozendaal, L. A., Meskers, C. G., & Arwert, H. J. (2004). Isometric shoulder muscle activation patterns for 3-D planar forces: a methodology for musculo-skeletal model validation. Clinical Biomechanics, 19(8), 790–800.
Dvir, Z., & Berme, N. (1978). The shoulder complex in elevation of the arm: a mechanism approach. Journal of Biomechanics, 11(5), 219-225.
Funk, L. (2005). Rotator cuff biomechanics. For MSc Orthopaedic Engineering.
Hermens, H. J., B. Freriks, C., & Disselhorst-Klug, G. (2000). Development of recommendations for SEMG sensors and sensor placement procedures. Journal of Electromyography & Kinesiology, 10(5), 361–374.
Holtby, R., & Razmjou, H. (2004). Accuracy of the Speed’s and Yergason’s tests in detecting biceps pathology and SLAP lesions: comparison with arthroscopic findings. Arthroscopy: The Journal of Arthroscopic & Related Surgery, 20(3), 231-236.
Inman, V. T., Dec, J. B., Saunders, M., & Abbott, L. C. (1944). Observations on the function of the shoulder joint. Journal of Bone and Joint Surgery, 26(1), 1-30.
Jarvholm, U., Palmerud, G., Karlsson, D., Herberts, P., & Kadefors, R. (1991). Intramuscular pressure and electromyography in four shoulder muscles. Journal of Orthopaedic Research, 9(4), 609–619.
Johnson, G., Bogduk, N., Nowitzke, A., & House, D. (1994). Anatomy and actions of the trapezius muscle. Clinical Biomechanics, 9(1), 44-50.
Johnson, G. R., & Pandyan, A. D. (2005). The activity in the three regions of the trapezius under controlled loading conditions: an experimental and modelling study. Clinical Biomechanics, 20(2), 155-161.
Kelly, B. T., Backus, S. I., Warren, R. F., & Williams, R. J. (2002). Electromyographic analysis and phase definition of the overhead football throw. American Journal of Sports Medicine, 30(6), 837–844.
Kronberg, M., Nemeth, G., & Brostrom, L. A. (1990). Muscle activity and coordination in the normal shoulder: an electromyographic study. Clinical Orthopaedics and Related Research, 257, 76-85.
Laursen, B., Jensen, B. R., & Sjogaard, G. (1998). Effect of speed and precision demands on human shoulder muscle electromyography during a repetitive task. European Journal of Applied Physiology and Occupational Physiology, 78(6), 544–8.
Levangie, P., & Norkin, C. (2005). Joint structure and function: A comprehensive analysis. 4th Edition, F. A. Davis Company, Human mechanics.
MacDonell, C. W., & Keir, P. J. (2005). Interfering effects of the task demands of grip force and mental processing on isometric shoulder strength and muscle activity. Journal of Ergonomics, 48(15), 1749–1769.
Magarey, M. E., & Jones, M. A. (2003). Dynamic evaluation and early management of altered motor control around the shoulder complex. Manual Therapy, 8(4), 195-206.
Mathiassen, S. E., & Winkel, J. (1990). Electromyographic activity in the shoulder–neck region according to arm position and glenohumeral torque. European Journal of Applied Physiology and Occupational Physiology, 61(5-6), 370-379.
Mottram, S. L. (1997). Dynamic stability of the scapula. Manual Therapy, 2, 123-31.
Oatis, C. (2009). Kynesiology: the mechanics and pathomechanics of human movement. 2th Edition. Baltimore.
Poppen, N. K., & Walker, P. S. (1978). Forces at the glenohumeral joint in abduction. Clinical Orthopaedics and Related Research, 165–170.
Hess, S. A. (2000). Functional stability of the glenohumeral joint. Manual Therapy, 5(2), 63-71.
Sharkey, N. A., & Marder, R. A. (1995). The rotator cuff opposes superior translation of the humeral head. American Journal of Sports Medicine, 23(3), 270-275.
Sigholm, G., Herberts, P., Almstrom, C., & Kadefors, R. (1984). Electromyographic analysis of shoulder muscle load. Journal Orthopaedics Research, 1, 379-86.
Sommerich, C. M., McGlothlin, J. D., & Marras W. S. (1993). Occupational risk factors associated with soft tissue disorders of the shoulder: a review of recent investigations in the literature. Ergonomics, 36(6), 697–717.
Sporrong, H., Palmerud, G., & Herberts, P. (1996). Hand grip increases shoulder muscle activity, An EMG analysis with static hand contractions in 9 subjects. Journal Acta Orthopaedica Scandinavica, 67(5), 485–490.
Sporrong, H., Palmerud, G., & Herberts, P. (1995). Influences of handgrip on shoulder muscle activity. European Journal of Applied Physiology and Occupational Physiology, 71(6), 485–492.
Timmons, M. K., Lopes-Albers, A. D., Borgsmiller, L., Zirker, C., Ericksen, J., & Michener, L. A. (2013). Differences in scapular orientation, subacromial space and shoulder pain between the full can and empty can tests. Clinical Biomechanics, 28(4), 395-401.
Vincent, J. I., Mac Dermid, J. C., Michlovitz, S. L., Rafuse, R., Wells-Rowsell, C., Wong, O., & Bisbee, L. (2014). The push-off test: Development of a simple, reliable test of upper extremity weight-bearing capability. Journal of Hand Therapy, 27(3), 1-6.
Vicon Motion Systems Limited. All rights reserved. Upper Limb Model Product Guide Revision 1.0 July 2007 For use with Upper Limb Model Version 1.0. (2007). https://www.vicon.com/downloads/documentation/vicon-documentation/ upper-limb-model-guide
Wickham, J., Pizzari, T., Stansfeld, K., Burnside, A., & Watson, L. (2010). Quantifying ‘normal’shoulder muscle activity during abduction. Journal of Electromyography and Kinesiology, 20(2), 212-222.
Wiedenbauer, M. M., & Mortensen, O. A. (1952). An electromyographic study of the trapezius muscle. American Journal of Physical Medicine & Rehabilitation, 31(5), 363-372.
Yoshizaki, K., Hamada, J., Tamai, K., Sahara, R., Fujiwara, T., & Fujimoto, T. (2009). Analysis of the scapulohumeral rhythm and electromyography of the shoulder muscles during elevation and lowering: comparison of dominant and nondominant shoulders. Journal of Shoulder and Elbow Surgery, 18(5), 756-763.