Open AccessThe electromyographic activity characteristics of the gluteus medius muscle before and after total hip arthroplasty
Author(s) -
Konrad Kopeć,
Przemysław Bereza,
Grzegorz Sobota,
Grzegorz Hajduk,
Damian Kusz
Publication year - 2021
Publication title -
acta of bioengineering and biomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.361
H-Index - 25
eISSN - 2450-6303
pISSN - 1509-409X
DOI - 10.37190/abb-01753-2020-02
Subject(s) - medius , electromyography , medicine , arthroplasty , osteoarthritis , gluteal muscles , hip surgery , rehabilitation , hip replacement , physical medicine and rehabilitation , surgery , physical therapy , alternative medicine , pathology
Purpose: The clinical outcomes of total hip arthroplasty are influenced by the correct muscle function that determines good, longterm and proper function of the artificial joint. The aim of the study was to analyze the electromyographic activity of the gluteus medius muscle in patients with hip osteoarthritis and after arthroplasty in various static weight bearing conditions, both on the affected and contralateral side. Methods: The prospective study involved 70 patients qualified for hip replacement. Patients underwent a surface electromyography of the gluteus medius muscle which involved the Trendelenburg test. The normalized results were obtained for both hips, preoperatively and 6 months after arthroplasty. Results: The only muscle activity differences were found at a full load condition of lower limb. In the preoperative assessment, the activity of the gluteus medius muscle was greater on the side qualified for surgery. After arthroplasty and the rehabilitation period, the muscle activity on the operated side decreased and significantly increased on the contralateral side. Detailed analysis of the contralateral side revealed relationship with osteoarthritis. Previous hip arthroplasty of that side resulted in lower muscle activity, similar to fully functional joints. Conclusion: The activity characteristics of the gluteus medius muscle vary depending on the condition of the joint, and the characteristics change as a result of the surgical procedure performed on both the operated and contralateral sides. These dependencies should be taken into account in the rehabilitation process, especially at the side opposite to the operated one.