ELECTROMYOGRAPHICAL ACTIVITY OF DIFFERENT SECTIONS OF DELTOID AND SUPRASPINATUSMUSCLES DURING DYNAMIC ABDUCTION OF UPPER LIMB IN VARIOUS SPEEDS AND LOADING INHEALTHY ADOLESCENT SUBJECTS

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Abbasi Soghra; FARAHPOUR NADER; BAHRPEIMA FARID

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Journal: MEDICAL JOURNAL OF TABRIZ UNIVERSITY OF MEDICAL SCIENCES Year:2018 | Volume:40 | Issue:4 Page(s): 47-52

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Title

ELECTROMYOGRAPHICAL ACTIVITY OF DIFFERENT SECTIONS OF DELTOID AND SUPRASPINATUSMUSCLES DURING DYNAMIC ABDUCTION OF UPPER LIMB IN VARIOUS SPEEDS AND LOADING INHEALTHY ADOLESCENT SUBJECTS

Author(s)

Abbasi Soghra | FARAHPOUR NADER | BAHRPEIMA FARID | Issue Writer Certificate

Keywords

ELECTROMYOGRAPHYQ1

SHOULDER JOINTQ2

ABDUCTIONQ1

DELTOIDQ1

SUPRASPINATUSQ1

Abstract

Background: Understanding of shoulder muscles function in various dynamic tasks is effective to understand theunderlying mechanism of the shoulder injuries in sport activities. The aim of this study was to identify the electricalactivity of DELTOID and SUPRASPINATUS muscles during the fast and slow shoulder ABDUCTION with and without anexternal load in healthy adolescent subjects. Methods: In 16 females (20-28 years old), using a surface EMG system (MA-300), the activity of DELTOID(anterior, medial, and posterior portions), and SUPRASPINATUS muscles within 90º of shoulder ABDUCTION in slow (22. 5 º /s) and fast (45 º /s) movements that were repeated with and without a dumbbell (equal to 5% of body mass) wereregistration. Repeated Measure ANOVA was used with SPSS-22 for statistics analysis having p≤ 0. 05. Results: In slow without load ABDUCTION, the intensity of the activity of anterior, medial, and posterior DELTOID andsupraspinatus Muscles were %18. 22± 1. 92, %50. 55± 1. 97, %50. 60± 17. 50 and %39. 49± 3. 78, microvolt respectively. In with and without load conditions, the posterior and middle DELTOID muscles displayed significantly greater activitythan the other muscles. Load factor significantly increased the muscle activity by1. 19 times (P=0. 0001). However, loading effect was greater in posterior DELTOID than in other muscles. Speed factor displayed similar effect in allmuscles. Conclusion: The cause of the higher activity of posterior DELTOID than anterior DELTOID could be specified by themechanism of external rotation of the humerus during shoulder ABDUCTION. The strengthening of posterior DELTOIDshould be noteworthy in rehabilitation shoulder exercises.

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APA: Copy

Abbasi, Soghra, FARAHPOUR, NADER, & BAHRPEIMA, FARID. (2018). ELECTROMYOGRAPHICAL ACTIVITY OF DIFFERENT SECTIONS OF DELTOID AND SUPRASPINATUSMUSCLES DURING DYNAMIC ABDUCTION OF UPPER LIMB IN VARIOUS SPEEDS AND LOADING INHEALTHY ADOLESCENT SUBJECTS. MEDICAL JOURNAL OF TABRIZ UNIVERSITY OF MEDICAL SCIENCES, 40(4 ), 47-52. SID. https://sid.ir/paper/47268/en

Vancouver: Copy

Abbasi Soghra, FARAHPOUR NADER, BAHRPEIMA FARID. ELECTROMYOGRAPHICAL ACTIVITY OF DIFFERENT SECTIONS OF DELTOID AND SUPRASPINATUSMUSCLES DURING DYNAMIC ABDUCTION OF UPPER LIMB IN VARIOUS SPEEDS AND LOADING INHEALTHY ADOLESCENT SUBJECTS. MEDICAL JOURNAL OF TABRIZ UNIVERSITY OF MEDICAL SCIENCES[Internet]. 2018;40(4 ):47-52. Available from: https://sid.ir/paper/47268/en

IEEE: Copy

Soghra Abbasi, NADER FARAHPOUR, and FARID BAHRPEIMA, “ELECTROMYOGRAPHICAL ACTIVITY OF DIFFERENT SECTIONS OF DELTOID AND SUPRASPINATUSMUSCLES DURING DYNAMIC ABDUCTION OF UPPER LIMB IN VARIOUS SPEEDS AND LOADING INHEALTHY ADOLESCENT SUBJECTS,” MEDICAL JOURNAL OF TABRIZ UNIVERSITY OF MEDICAL SCIENCES, vol. 40, no. 4 , pp. 47–52, 2018, [Online]. Available: https://sid.ir/paper/47268/en

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