نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه پژوهشی ارتوپدی-بیومکانیک، گروه مهندسی مکانیک ، دانشکده مهندسی، دانشگاه بیرجند، بیرجند، خراسان جنوبی، ایران
2 گروه بیومکانیک و علوم ورزشی ، دانشکده علوم رفتاری، دانشگاه بیرجند، بیرجند،خراسان جنوبی، ایران
چکیده
کلیدواژه‌ها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Background and Aims: Hip dysplasia is a pathological condition of the hip joint characterized by abnormal acetabular geometry, resulting in insufficient coverage of the femoral head. This inadequate coverage, along with the relative lateral displacement of the femoral head, reduces the articular contact surface, alters intra-articular loading, and increases mechanical stress throughout the hip joint. Such stress accelerates cartilage wear, making patients more susceptible to early-onset hip osteoarthritis. Muscle forces and joint reaction forces are the primary mechanical factors in hip joint loading, and these forces are altered in patients with hip dysplasia. Examining the relationship between muscle activity, gait patterns, and joint contact forces can enhance the understanding of the pathophysiological mechanisms underlying hip dysplasia and aid in the development of more effective treatment strategies.This study aims to analyze these interactions and identify factors influencing the improvement of hip joint function in individuals with hip dysplasia. The findings and insights derived from this research can be applied in clinical settings to aid muscle-strengthening exercises, thereby enhancing rehabilitation and clinical management of such patients.The primary objective of this study is to investigate and compare the activity of pelvic girdle muscles in individuals with hip dysplasia and healthy controls using musculoskeletal modeling.
Materials and Methods: In this study, 10 healthy individuals (mean age: 23 ± 1.68) and 10 patients with left-side hip dysplasia (mean age: 25 ± 2.54) were recruited and voluntarily participated in the research. The study aimed to analyze and compare the activity of the gluteus medius, gluteus maximus, rectus femoris, and tensor fascia lata (TFL) muscles between the two groups.
Gait data from both healthy and dysplastic participants were utilized in the OpenSim software to calculate and analyze muscle activity for further investigation.
Results:
No significant differences were observed in the demographic characteristics of participants between the healthy and dysplasia groups (P > 0.05). However, the significance level of muscle activity in the gluteus medius, tensor fascia lata (TFL), and rectus femoris muscles was found to be less than 0.05 (P < 0.05).The gluteus medius and tensor fascia lata muscles exhibited significantly higher activity in individuals with hip dysplasia compared to the control group. Additionally, the activity of the gluteus maximus muscle also increased relative to the control group. Conversely, the rectus femoris muscle demonstrated a decrease in activity.
Conclusion: This study demonstrated that during the gait cycle, individuals with hip dysplasia exhibit elevated muscle activation levels compared to healthy controls. Furthermore, the GRFs and CoP dynamics showed distinct patterns in the dysplasia group. The altered biomechanics of hip dysplasia shorten the muscle moment arm, necessitating greater muscle forces to achieve the required joint torques. These findings highlight that increased muscle activity in hip dysplasia not only impairs movement efficiency but also elevates intra-articular forces. Therefore, the development of targeted therapeutic interventions aimed at optimizing biomechanical function and mitigating excessive muscle activation is crucial for the effective management of hip dysplasia.
Keywords: Muscle activation, hip dysplasia, gait biomechanics, musculoskeletal modeling
کلیدواژه‌ها [English]
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