Electromyographic and kinematic study of reverse total shoulder arthroplasty: an observational prospective cohort study

BackgroundReverse total shoulder arthroplasty (RTSA) procedures have significantly increased in the last decade as an alternative to current treatments for cuff-tear arthropathy. Since Grammont's theory 1987, few data about vivo kinetics of shoulder-girdle musculature patients with RTSA been available. The goals this study are (1) describe contribution principal muscles around by electromyography and (2) access range motion 5 movements compared normal shoulders.MethodsThis is observational prospective cohort 21 divided into 11 10 controls. muscular activity was recorded bipolar cutaneous electrodes, whereas synchronized 8 cameras. Five (flexion, abduction, neutral external rotation, rotation 90° internal abduction) were studied.ResultsThe upper trapezius main activator all directions early constant (P < .01). latissimus dorsi demonstrates .01) well posterior deltoid group control .01).ConclusionRTSA muscle activation different than shoulders. significant directions, has never described within same until today. New rehabilitation protocols targeting those could demonstrate better more homogeneous results increase patient satisfaction. Reverse This studied.