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Biomechanics of ankle instability Part 1 : Reaction time to simulated ankle sprain. / Mitchell, Andrew; Dyson, Rosemary; Hale, Tudor; Abraham, Corinne.

In: Medicine and Science in Sports and Exercise, Vol. 40, No. 8, 2008, p. 1515-21.

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Mitchell, Andrew ; Dyson, Rosemary ; Hale, Tudor ; Abraham, Corinne. / Biomechanics of ankle instability Part 1 : Reaction time to simulated ankle sprain. In: Medicine and Science in Sports and Exercise. 2008 ; Vol. 40, No. 8. pp. 1515-21.

Bibtex

@article{7bd4ea4232dd4195a705ac53f3d54c8a,
title = "Biomechanics of ankle instability Part 1: Reaction time to simulated ankle sprain",
abstract = "Purpose: To test the hypothesis that ankles with functional instability will demonstrate slower muscular reaction times than their contralateral stable ankle (SA) and stable healthy controls to a simulated nonpathological ankle sprain mechanism. Methods: Nineteen male volunteers with a history of unilateral ankle sprain and functional ankle instability (FAI) and 19 healthy male controls performed reaction time tests on a purpose-built platform thatsimulated a nonpathological combined inversion/plantarflexion ankle sprain mechanism. Participants provided informed written consent. Reaction time and muscle activity magnitude data were reported for the FAI group`s unstable (UA) and stable ankles (SA) and the control group`s dominant (DA) and nondominant ankles (NDA) to unilateral simulated ankle sprain (USAS). Results: The reaction times of the peroneus longus (PL), peroneus brevis (PB), and tibialis anterior (TA) in the UA were significantly slower (P G 0.025) thanthe SA and control group{\textquoteright}s DA in the limb experiencing USAS. The reaction times of the support limb PL, TA, and extensor digitorum longus (EDL) muscles of the UA were slower than the DA (P G 0.025). The magnitude of EMG response was not different between the SA and UA (P 9 0.025). Conclusions: Results demonstrate a deficit (slower reaction time) in ankles with FAI when acting in support and when exposed to a simulated sprain compared to stable healthy controls. As a result of slower reaction times, acting to support the UA may put the contralateral SA at an increased risk of ankle sprain. This suggests that rehabilitation of a lateral ankle sprain shouldinclude strengthening the evertors (peroneals and EDL) at the subtalar joint and the dorsiflexors (TA and EDL) at the talocrural joint.",
keywords = "Adult, Ankle Injuries, Biomechanics, Humans, Joint Instability, Male, Reaction Time, Sprains and Strains",
author = "Andrew Mitchell and Rosemary Dyson and Tudor Hale and Corinne Abraham",
year = "2008",
doi = "10.1249/MSS.0b013e31817356b6",
language = "English",
volume = "40",
pages = "1515--21",
journal = "Medicine and Science in Sports and Exercise",
issn = "0195-9131",
publisher = "Lippincott Williams and Wilkins",
number = "8",

}

RIS

TY - JOUR

T1 - Biomechanics of ankle instability Part 1

T2 - Reaction time to simulated ankle sprain

AU - Mitchell, Andrew

AU - Dyson, Rosemary

AU - Hale, Tudor

AU - Abraham, Corinne

PY - 2008

Y1 - 2008

N2 - Purpose: To test the hypothesis that ankles with functional instability will demonstrate slower muscular reaction times than their contralateral stable ankle (SA) and stable healthy controls to a simulated nonpathological ankle sprain mechanism. Methods: Nineteen male volunteers with a history of unilateral ankle sprain and functional ankle instability (FAI) and 19 healthy male controls performed reaction time tests on a purpose-built platform thatsimulated a nonpathological combined inversion/plantarflexion ankle sprain mechanism. Participants provided informed written consent. Reaction time and muscle activity magnitude data were reported for the FAI group`s unstable (UA) and stable ankles (SA) and the control group`s dominant (DA) and nondominant ankles (NDA) to unilateral simulated ankle sprain (USAS). Results: The reaction times of the peroneus longus (PL), peroneus brevis (PB), and tibialis anterior (TA) in the UA were significantly slower (P G 0.025) thanthe SA and control group’s DA in the limb experiencing USAS. The reaction times of the support limb PL, TA, and extensor digitorum longus (EDL) muscles of the UA were slower than the DA (P G 0.025). The magnitude of EMG response was not different between the SA and UA (P 9 0.025). Conclusions: Results demonstrate a deficit (slower reaction time) in ankles with FAI when acting in support and when exposed to a simulated sprain compared to stable healthy controls. As a result of slower reaction times, acting to support the UA may put the contralateral SA at an increased risk of ankle sprain. This suggests that rehabilitation of a lateral ankle sprain shouldinclude strengthening the evertors (peroneals and EDL) at the subtalar joint and the dorsiflexors (TA and EDL) at the talocrural joint.

AB - Purpose: To test the hypothesis that ankles with functional instability will demonstrate slower muscular reaction times than their contralateral stable ankle (SA) and stable healthy controls to a simulated nonpathological ankle sprain mechanism. Methods: Nineteen male volunteers with a history of unilateral ankle sprain and functional ankle instability (FAI) and 19 healthy male controls performed reaction time tests on a purpose-built platform thatsimulated a nonpathological combined inversion/plantarflexion ankle sprain mechanism. Participants provided informed written consent. Reaction time and muscle activity magnitude data were reported for the FAI group`s unstable (UA) and stable ankles (SA) and the control group`s dominant (DA) and nondominant ankles (NDA) to unilateral simulated ankle sprain (USAS). Results: The reaction times of the peroneus longus (PL), peroneus brevis (PB), and tibialis anterior (TA) in the UA were significantly slower (P G 0.025) thanthe SA and control group’s DA in the limb experiencing USAS. The reaction times of the support limb PL, TA, and extensor digitorum longus (EDL) muscles of the UA were slower than the DA (P G 0.025). The magnitude of EMG response was not different between the SA and UA (P 9 0.025). Conclusions: Results demonstrate a deficit (slower reaction time) in ankles with FAI when acting in support and when exposed to a simulated sprain compared to stable healthy controls. As a result of slower reaction times, acting to support the UA may put the contralateral SA at an increased risk of ankle sprain. This suggests that rehabilitation of a lateral ankle sprain shouldinclude strengthening the evertors (peroneals and EDL) at the subtalar joint and the dorsiflexors (TA and EDL) at the talocrural joint.

KW - Adult

KW - Ankle Injuries

KW - Biomechanics

KW - Humans

KW - Joint Instability

KW - Male

KW - Reaction Time

KW - Sprains and Strains

UR - http://www.scopus.com/inward/record.url?scp=58149357705&partnerID=8YFLogxK

U2 - 10.1249/MSS.0b013e31817356b6

DO - 10.1249/MSS.0b013e31817356b6

M3 - Article

C2 - 18705024

VL - 40

SP - 1515

EP - 1521

JO - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

SN - 0195-9131

IS - 8

ER -