Electromyographic Predictors of Residual Quadriceps Muscle Weakness after Anterior Cruciate Ligament Reconstruction
| Autor: | Stephen J. Nicholas, Timothy F. Tyler, Michael G. Browne, Gilbert W. Gleim, Malachy P. McHugh |
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| Rok vydání: | 2002 |
| Předmět: |
Adult
Male medicine.medical_specialty Anterior cruciate ligament reconstruction medicine.medical_treatment Anterior cruciate ligament Physical Therapy Sports Therapy and Rehabilitation Knee Injuries Electromyography Cohort Studies 03 medical and health sciences Postoperative Complications 0302 clinical medicine Physical medicine and rehabilitation Predictive Value of Tests medicine Humans Orthopedics and Sports Medicine Prospective Studies Anterior Cruciate Ligament Muscle Skeletal 030222 orthopedics Muscle Weakness medicine.diagnostic_test business.industry Biomechanics Quadriceps muscle weakness Muscle weakness Recovery of Function 030229 sport sciences Tibial Meniscus Injuries Surgery medicine.anatomical_structure Predictive value of tests Orthopedic surgery Female medicine.symptom business |
| Zdroj: | The American Journal of Sports Medicine. 30:334-339 |
| ISSN: | 1552-3365 0363-5465 |
| DOI: | 10.1177/03635465020300030601 |
| Popis: | Background Despite the high prevalence of residual quadriceps muscle weakness after anterior cruciate ligament reconstruction, specific predictive factors have not been identified. Hypothesis Electromyographic analysis is a better predictor of residual muscle weakness than is preoperative strength. Study Design Prospective cohort study. Methods The quadriceps muscle strength of 37 patients (25 men, 12 women) was measured before reconstruction and 5 weeks and 6 months after surgery. Quadriceps surface electromyographic signals were recorded during all of the strength tests. Integrated electromyographic analysis and median frequency measurements were computed as deficits on the involved side. Patients also performed a single-legged hop test at the 6-month follow-up examination. Results The patients had significantly lower strength, integrated electromyographic analysis, and median frequency measurements on the involved side at all three time intervals. The best predictor of the quadriceps muscle strength deficit at 6 months was the combination of the preoperative median frequency deficit and the 5-week postoperative strength deficit. The best predictor of the hop test deficit at 6 months was the combination of preoperative deficits in integrated electromyographic analysis and median frequency. Conclusion Preoperative electromyographic indices of quadriceps muscle function and early postoperative strength were predictive of residual weakness and impaired function 6 months after reconstruction. |
| Databáze: | OpenAIRE |
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