Research Article of Internal Journal of Sports Medicine and Rehabilitation
The comparison of the shoulder muscle activation in patients with rotator cuff tear under an abduction brace among the three postures
Kazuya Okazawa1*, Naohide Takeuchi2, Naoya Kozono2, Kenichi Kawaguchi2, Sachie Noda1, Masayuki Kawaguchi1, Yasuharu Nakashima2
1Department of Rehabilitation, Kyushu University Hospital, Fukuo-ka, Japan.
2Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
Background: Immobilization using an abduction brace is essential for the relaxation of the rotator cuff and scapular muscles and the prevention of a retear in patients with rotator cuff tear after arthroscopic rotator cuff repair (ARCR). However, thus far, the comparison of the scapular muscle activities has not been compared among different postures under an abduction brace in patients after ARCR.
Objectives: The purpose of our study was to compare the scapular muscle activities among the supine position, sitting position, and walking under an abduction brace before and after ARCR
Study Design: Observational, repeated measures study.
Methods: Twelve patients with full-thickness rotator cuff tears were studied. The mean patient age was 64.7 years. The scapular muscle activations of the ipsilateral limbs were measured using surface electromyography in three postures: supine position, sitting position, and walking. The integrated electromyography relative values of the upper trapezius, anterior deltoid, middle deltoid, and biceps brachii were compared preoperatively and at two weeks after ARCR.
Results: The trapezius, biceps brachii, and middle deltoid in the walking showed significantly higher integrated electromyography relative values than those in the supine position, preoperatively and at two weeks after surgery. The anterior deltoid in the sitting position had significantly higher integrated electromyography relative values than those in the supine position.
Conclusions: Postures affected the scapular muscle activities in ARCR patients under an abduction brace. Understanding the influence of posture on the scapular muscle activity after ARCR will help rehabilitation accurately and appropriately.
Keywords: shoulder muscle activation; patients; rotator cuff tear; abduction brace; three postures
How to cite this article:
Kazuya Okazawa, Naohide Takeuchi, Naoya Kozono, Kenichi Kawaguchi, Sachie Noda, Masayuki Kawaguchi, Yasuharu Nakashima. The comparison of the shoulder muscle activation in patients with rotator cuff tear under an abduction brace among the three postures. Internal Journal of Sports Medicine and Rehabilitation, 2021; 4:14.. DOI: 10.28933/ijsmr-2020-11-2705
1. Yamamoto A, Takagishi K, Osawa T, et al. Prevalence and risk factors of a rotator cuff tear in the general population. J Shoulder Elbow Surg 2010; 19:116-120.
2. Yamamoto A, Takagishi K, Kobayashi T, et al. Factors involved in the presence of symptoms associated with rotator cuff tears: a comparison of asymptomatic and symptomatic rotator cuff tears in the general population. J Shoulder Elbow Surg 2011; 20:1133-1137.
3. Hsu JE, Gee AO, Lippitt SB, et al. The rotator cuff. In: Rockwood Jr CA, Matsen Ⅲ FA, Wirth MA et al. (eds) Rockwood and Matsen’s The Shoulder. 5th ed. Philadelphia: Elsevier, 2017, pp. 651-719.
4. Edwards PK, Ebert JR, Littlewood C, et al. A Systematic Review of Electromyography Studies in Normal Shoulders to Inform Postoperative Rehabilitation Following Rotator Cuff Repair. J Orthop Sports Phys Ther. 2017; 47:931-944.
5. Spall P, Ribeiro DC, Sole G. Electromyographic Activity of Shoulder Girdle Muscles in Patients With Symptomatic and Asymptomatic Rotator Cuff Tears: A Systematic Review and Meta-Analysis. PM R. 2016; 8:894–906.
6. Alenabi T, Jackson M, Tétreault P, et al. Electromyographic activity in the shoulder musculature during resistance training exercises of the ipsilateral upper limb while wearing a shoulder orthosis. J Shoulder Elbow Surg 2014; 23:140–148.
7. Andersen CH, Zebis MK, Saervoll C, et al. Scapular muscle activity from selected strengthening exercises performed at low and high intensities. J Strength Cond Res 2012; 26:2408–2416.
8. de Oliveira FCL, Bouyer LJ, Ager AL, et al. Electromyographic analysis of rotator cuff muscles in patients with rotator cuff tendinopathy: A systematic review. J Electromyogr Kinesiol 2017;35:100-114.
9. Fujisawa H, Suenaga N, Minami A.Electromyographic study during isometric exercise of the shoulder in head-out water immersion. J Shoulder Elbow Surg 1998;7:491-494.
10. Gurney AB, Mermier C, LaPlante M, et al. Shoulder Electromyography Measurements During Activities of Daily Living and Routine Rehabilitation Exercises. J Orthop Sports Phys Ther 2016 ; 46:375-383.
11. Hardwick DH, Beebe JA, McDonnell MK, et al. A comparison of serratus anterior muscle activation during a wall slide exercise and other traditional exercises. J Orthop Sports Phys Ther 2008; 36:903–910.
12. Jung MC, Kim SJ, Rhee JJ, et al. Electromyographic activities of the subscapularis, supraspinatus and infraspinatus muscles during passive shoulder and active elbow exercises. Knee Surg Sports Traumatol Arthrosc 2016; 24:2238-2243.
13. Krause DA, Dueffert LG, Postma JL, et al. Influence of Body Position on Shoulder and Trunk Muscle Activation During Resisted Isometric Shoulder External Rotation. Sports Health 2018; 10:355–360.
14. Miyakoshi K, Umehara J, Komamura T, et al. Effect of different trunk postures on scapular muscle activities and kinematics during shoulder external rotation. J Shoulder Elbow Surg 2019; 28:2438–2446.
15. Nakamura Y, Tsuruike M, Ellenbecker TS. Electromyographic activity of scapular muscle control in free-motion exercise. J Athl Train 2016; 51:195–204.
16. Uhl TL, Carver TJ, Mattacola CG, et al. Upper Extremity Weight-Bearing Exercise. J Orthop Sport Phys Ther 2003; 33:109–117.
17. De Casas R, Lois M, Cidoncha M, et al. Clinic and electromyographic results of latissimus dorsi transfer for irreparable posterosuperior rotator cuff tears. J Orthop Surg Res 2014; 9:83.
18. Fritz JM, Inawat RR, Slavens BA, et al. Assessment of Kinematics and Electromyography Following Arthroscopic Single-Tendon Rotator Cuff Repair. PM R 2017;9: 464-476.
19. Hawkes DH, Alizadehkhaiyat O, Kemp GJ, et al. Electromyographic assessment of muscle fatigue in massive rotator cuff tear. J Electromyogr Kinesiol 2015;25: 93-99.
20. Hoellrich RG, Gasser SI, Morrison DS, et al. Electromyographic evaluation after primary repair of massive rotator cuff tears. J Shoulder Elbow Surg 2005;14: 269-272.
21. Kelly BT, Williams RJ, Cordasco FA, et al.Differential patterns of muscle activation in patients with symptomatic and asymptomatic rotator cuff tears.J Shoulder Elbow Surg 2005;14: 165-171.
22. Kido T, Itoi E, Konno N, et al. Electromyographic activities of the biceps during arm elevation in shoulders with rotator cuff tears. Acta Orthop Scand 1998;69: 575-579.
23. Steenbrink F, de Groot JH, Veeger HE, et al. Pathological muscle activation patterns in patients with massive rotator cuff tears, with and without subacromial anaesthetics. Man Ther 2006;11:231-237.
24. Agur A.M.R. Lee MJ. Grant’s atlas of anatomy. 10th ed. Baltimore, Maryland: Lippincott Williams & Wilkins; 1999. Pp.443-447.
25. Bosco C, Komi P V., ITO A. Prestretch potentiation of human skeletal muscle during ballistic movement. Acta Physiol Scand 1981; 111:135-140.
26. Komi PV. Physiological and biomechanical correlates of muscle function: effects of muscle structure and stretch-shortening cycle on force and speed. Exerc Sport Sci Rev 1984; 12:81-121.
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