Journal article
Specificity of muscle action after anterior cruciate ligament injury
Journal of orthopaedic research, v 21(6), pp 1131-1137
Nov 2003
PMID: 14554229
Abstract
Neuromuscular control is believed to be a critical factor in dynamic knee stability. The purpose of this study was to evaluate voluntary muscle control in anterior cruciate ligament deficient (ACL-D) and uninjured people. Twenty athletes of similar age participated in this study. Subjects performed a target-matching protocol that required them to produce isometric moments about the knee with fine control in flexion, extension, varus, and valgus (i.e., loads were generated in the plane perpendicular to the long axis of the shank). Electromyographic data were collected from 10 muscles that span the knee. A specificity index was calculated for each muscle to describe how fine-tuned (specific) its muscle activity pattern was with respect to its principal direction of action in the load plane. Diminished specificity of muscle action was observed in 8 of 10 muscles in the ACL-D subjects’ involved knees when compared with the activity patterns from their uninvolved knees and those from the uninjured subjects’ knees. The vastus lateralis muscle was especially affected. Increased and more global co-contraction was also observed in the ACL-D limbs. The alterations in muscle firing patterns observed in this study are consistent with diminished neuromuscular control.
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Details
- Title
- Specificity of muscle action after anterior cruciate ligament injury
- Creators
- Glenn N Williams - University of DelawarePeter J Barrance - University of DelawareLynn Snyder-Mackler - University of DelawareMichael J Axe - University of DelawareThomas S Buchanan - University of Delaware
- Publication Details
- Journal of orthopaedic research, v 21(6), pp 1131-1137
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physical Therapy (and Rehabilitation Sciences)
- Web of Science ID
- WOS:000186144200024
- Scopus ID
- 2-s2.0-0142241256
- Other Identifier
- 991021887710104721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Orthopedics