Motion of the shoulder complex in individuals with isolated acromioclavicular osteoarthritis and associated with rotator cuff dysfunction: Part 2-Muscle activity

Author(s)

Sousa, Catarina de Oliveira ^{[1, 2]} ; Michener, Lori Ann ^[3] ; Ribeiro, Ivana Leao ^[1] ; de Menezes Reiff, Rodrigo Bezerra ^[4] ; Camargo, Paula Rezende ^[1] ; Salvini, Tania Fatima ^[1]

Affiliation

^[1] Univ Fed Sao Carlos, Dept Phys Therapy, BR-13565905 Sao Carlos, SP - Brazil

^[2] Univ Fed Rio Grande do Norte, Dept Phys Therapy, BR-59072970 Natal, RN - Brazil

^[3] Virginia Commonwealth Univ, Dept Phys Therapy, Richmond, VA - USA

^[4] Univ Fed Sao Carlos, Dept Med, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY; v. 25, n. 1, p. 77-83, FEB 2015.
• Web of Science Citations: 2

Abstract

This study aimed to compare muscle activity in individuals with isolated acromioclavicular osteoarthritis (ACO), ACO associated with rotator cuff disease (ACO + RCD), and controls. Seventy-four participants (23 isolated ACO, 25 ACO + RCD, 26 controls) took part in this study. Disability was assessed with the Disabilities of the Arm, Shoulder and Hand (DASH) questionnaire. Muscle activity of the upper trapezius (UT), lower trapezius (LT), serratus anterior (SA), and anterior deltoid (AD) was collected during arm elevation in the sagittal and scapular planes. Pain during motion was assessed with the numerical pain rating scale. Analysis of the DASH, pain and kinematics were reported in part 1 of this study. For each muscle, separate 2-way linear mixed-model ANOVAs were performed to compare groups. ACO + RCD group had more UT and AD activity than the the isolated ACO and control other groups, more AD activity than the isolated ACO group during the ascending phase, and more AD activity than the ACO and control groups during the descending phase in both planes. Isolated ACO group had less SA activity than the control group only in the sagittal plane. Alterations in shoulder muscle activity are present in individuals with isolated ACO and with ACO + RCD and should be considered in rehabilitation. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 11/14642-9 - 3D kinematic and eletromyographic evaluation during elevation of the arm in subjects with isolated acromioclavicular osteoarthritis and associated with rotator cuff dysfunction
• Grantee: Catarina de Oliveira Sousa
• Support Opportunities: Scholarships in Brazil - Doctorate