{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,12]],"date-time":"2026-10-12T11:45:07Z","timestamp":1791805507033,"version":"4.3.4"},"reference-count":23,"publisher":"Human Kinetics","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2024]]},"abstract":"Context<\/jats:bold>:<\/jats:italic> 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<\/jats:bold>:<\/jats:italic> Descriptive laboratory study. Methods<\/jats:bold>:<\/jats:italic> Twenty healthy adults with no history of lateral ankle sprain injury completed an unanticipated single-leg drop landing onto a 25\u00b0 laterally inclined force platform from a height of 30\u00a0cm. 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\u00a0milliseconds prior to foot contact, and compared across threshold value using a 1-way analysis of variance (P<\/jats:italic>\u2009<\u2009.05). Results<\/jats:bold>:<\/jats:italic> The 2 SD threshold was significantly shorter than both 5 SD and 10 SD thresholds for the FL (P<\/jats:italic>\u2009<\u2009.01) and FB (P<\/jats:italic>\u2009<\u2009.01). Likewise, the 5 SD threshold was significantly shorter than the 10 SD thresholds for FL (P<\/jats:italic>\u2009=\u2009.004) and FB (P<\/jats:italic>\u2009=\u2009.003). Conclusions<\/jats:bold>:<\/jats:italic> 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.<\/jats:p>","DOI":"10.1123\/jsr.2023-0336","type":"journal-article","created":{"date-parts":[[2024,1,10]],"date-time":"2024-01-10T08:14:28Z","timestamp":1704874468000},"page":"1-5","source":"Crossref","is-referenced-by-count":1,"title":["Closed-Loop Reflex Responses of the Lateral Ankle Musculature From Various Thresholds During a Lateral Ankle Sprain Perturbation"],"prefix":"10.1123","author":[{"given":"Jeffrey D.","family":"Simpson","sequence":"first","affiliation":[{"name":"Sports Medicine and Neuromechanics Laboratory, Department of Movement Sciences and Health, University of West Florida, Pensacola, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ludmila","family":"Cosio Lima","sequence":"additional","affiliation":[{"name":"Sports Medicine and Neuromechanics Laboratory, Department of Movement Sciences and Health, University of West Florida, Pensacola, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Youngil","family":"Lee","sequence":"additional","affiliation":[{"name":"Sports Medicine and Neuromechanics Laboratory, Department of Movement Sciences and Health, University of West Florida, Pensacola, FL, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Harish","family":"Chander","sequence":"additional","affiliation":[{"name":"Neuromechanics Laboratory, Department of Kinesiology, Mississippi State University, Mississippi State, MS, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adam C.","family":"Knight","sequence":"additional","affiliation":[{"name":"Neuromechanics Laboratory, Department of Kinesiology, Mississippi State University, Mississippi State, MS, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"100","reference":[{"issue":"1","key":"r1","series-title":"Am J Sports Med","doi-asserted-by":"publisher","first-page":"201","DOI":"10.1177\/0363546516660980","article-title":"The epidemiology of lateral ligament complex ankle sprains in National Collegiate Athletic Association sports","volume":"45","author":"Roos KG","year":"2017","unstructured":"Roos KG, Kerr ZY, Mauntel TC, Djoko A, Dompier TP, Wikstrom EA. 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