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Journal article
Closed-Loop Reflex Responses of the Lateral Ankle Musculature From Various Thresholds During a Lateral Ankle Sprain Perturbation
Journal of sport rehabilitation, Vol.33(3), pp.215-219
03/2024
PMID: 38198793
Web of Science ID: WOS:001147535000001
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Abstract
Context : Latency is a reliable temporal metric used to evaluate sensorimotor integration of the fibularis longus (FL) and fibularis brevis (FB) during lateral ankle sprain perturbations. Currently, no clinical recommendations exist to select appropriate thresholds to evaluate the closed-loop reflex response of the lateral ankle musculature. The purpose of this study was to assess threshold value on latency of the FL and FB during an unanticipated inversion perturbation that simulates the mechanism of a lateral ankle sprain.
Design : Descriptive laboratory study.
Methods : Twenty healthy adults with no history of lateral ankle sprain injury completed an unanticipated single-leg drop landing onto a 25° laterally inclined force platform from a height of 30 cm. Surface electromyography recorded muscle activity data from the FL and FB during the inversion perturbation. Latency was identified at points where muscle activity exceeded 2, 5, and 10 SD above the average muscle activity 200 milliseconds prior to foot contact, and compared across threshold value using a 1-way analysis of variance ( P < .05).
Results : The 2 SD threshold was significantly shorter than both 5 SD and 10 SD thresholds for the FL ( P < .01) and FB ( P < .01). Likewise, the 5 SD threshold was significantly shorter than the 10 SD thresholds for FL ( P = .004) and FB ( P = .003).
Conclusions : More sensitive thresholds results in a shorter closed-loop reflexive response compared to the more rigorous thresholds. We recommend that selection of the appropriate threshold to identify latency of the lateral ankle musculature should be based on the device used to simulate a lateral ankle sprain and the ankle inversion velocity produced during the ankle inversion perturbation.
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Details
- Title
- Closed-Loop Reflex Responses of the Lateral Ankle Musculature From Various Thresholds During a Lateral Ankle Sprain Perturbation
- Publication Details
- Journal of sport rehabilitation, Vol.33(3), pp.215-219
- Resource Type
- Journal article
- Copyright
- © 2023 Human Kinetics
- Identifiers
- WOS:001147535000001; 99380497797306600
- Academic Unit
- Movement Sciences and Health; Usha Kundu, MD College of Health
- Language
- English