Study on Electromyographic Characteristics of Lower Limb Muscles in Lateral Ankle Sprain Patients Based on Arthrogenic Muscle Inhibition (AMI) Theory

DOI: https://doi.org/10.62517/jmpe.202618205

Author(s)

Bo Xiao¹, Zhaoyuan Huang¹,*, Wangting Chen²

Affiliation(s)

1School of Physical Education, Ningde Normal University, Ningde, FuJian, China 2Department of Sports, Fujian Sports Vocational Education and Technical College, Fuzhou, FuJian, China *Corresponding Author

Abstract

This study investigates the alterations in neuromuscular control of the knee joint following lateral ankle sprain, grounded in the Arthrogenic Muscle Inhibition (AMI) theory. Electromyographic assessments were conducted on the vastus lateralis (VL), vastus medialis (VM), semitendinosus (ST), and biceps femoris (BF) muscles. Signal extraction and feature analyses were performed to elucidate the underlying neuromuscular modifications. The findings indicate: 1) unilateral ankle sprains precipitate neural inhibition in adjacent knee joint musculature, consistent with the AMI framework; 2) the injured side exhibits significantly lower RMS max, RMS mean, and integrated EMG (iEMG) values compared to the healthy side, reflecting diminished peak and average muscle activation, reduced muscular stability, and decreased overall work output; 3) post-injury, the injured-side BF and ST muscles manifest pronounced inhibitory suppression and a decline in total work capacity, indicating a predisposition toward accelerated muscular fatigue.

Keywords

Lateral Ankle Sprain; Lower Limb Musculature; Knee Joint; Electromyography

References

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