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Biomechanics of ankle instability. Part 2 : Postural sway-reaction time relationship. / Mitchell, Andrew; Dyson, Rosemary; Hale, Tudor; Abraham, Corinne.

In: Medicine and Science in Sports and Exercise, Vol. 40, No. 8, 2008, p. 1522-8.

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Mitchell, Andrew ; Dyson, Rosemary ; Hale, Tudor ; Abraham, Corinne. / Biomechanics of ankle instability. Part 2 : Postural sway-reaction time relationship. In: Medicine and Science in Sports and Exercise. 2008 ; Vol. 40, No. 8. pp. 1522-8.

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@article{c12ea1a477124048ac120abb43916d2f,
title = "Biomechanics of ankle instability. Part 2: Postural sway-reaction time relationship",
abstract = "Purpose: To test the hypothesis that ankles with functional instability will demonstrate greater single-limb postural sway (PS) than their contralateral stable joint and stable healthy controls and to examine the relationship between single-limb postural sway and muscular reaction time to a simulated 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 12 single-limb PS tests, 3 on each leg with and without vision. Participants provided informed consent. Postural sway data are reported on the FAI group{\textquoteright}s unstable (UA) and stable ankles (SA), and the control group{\textquoteright}s dominant (DA) and nondominant ankles (NDA). Results: With vision, the UA and SA revealed similar postural control; however, the UA showed greater (P G 0.05) anteroposterior PS than the DA (0.46 cm) and the NDA (0.51 cm). Without vision, the UA showed greater (P G 0.05) medial(2.41 cm) and lateral (2.59 cm) PS than the SA and also showed greater (P G 0.05) medial (2.05 and 2.10 cm, respectively) and lateral (2.28 and 2.26 cm, respectively) than the DA and NDA. The relationship between PS and muscle reaction times, derived from the previous article was calculated. Significant correlations (P G 0.05) were found between the unstable ankle peroneus longus (PL) and peroneus brevis (PB) reaction time and lateral (r = 0.63 and r = 0.81, respectively), medial (r = 0.74 and r = 0.76, respectively), andanterior PS (r = 0.56 and r = 0.55, respectively; P G 0.01). Conclusions: Results reveal postural sway deficits in ankles with FAI. They also demonstrate a significant relationship between PL and PB reaction times and postural sway in UA. Individuals who sustain an acute ankle sprain and those with FAI require rehabilitation that improves proprioception, strengthens the evertors and dorsiflexors, and restores peroneal reaction time.",
keywords = "Adult, Ankle Injuries, Biomechanics, Humans, Joint Instability, Male, Postural Balance, Reaction Time, Sprains and Strains",
author = "Andrew Mitchell and Rosemary Dyson and Tudor Hale and Corinne Abraham",
year = "2008",
doi = "10.1249/MSS.0b013e31817356d6",
language = "English",
volume = "40",
pages = "1522--8",
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 2

T2 - Postural sway-reaction time relationship

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 greater single-limb postural sway (PS) than their contralateral stable joint and stable healthy controls and to examine the relationship between single-limb postural sway and muscular reaction time to a simulated 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 12 single-limb PS tests, 3 on each leg with and without vision. Participants provided informed consent. Postural sway data are reported on the FAI group’s unstable (UA) and stable ankles (SA), and the control group’s dominant (DA) and nondominant ankles (NDA). Results: With vision, the UA and SA revealed similar postural control; however, the UA showed greater (P G 0.05) anteroposterior PS than the DA (0.46 cm) and the NDA (0.51 cm). Without vision, the UA showed greater (P G 0.05) medial(2.41 cm) and lateral (2.59 cm) PS than the SA and also showed greater (P G 0.05) medial (2.05 and 2.10 cm, respectively) and lateral (2.28 and 2.26 cm, respectively) than the DA and NDA. The relationship between PS and muscle reaction times, derived from the previous article was calculated. Significant correlations (P G 0.05) were found between the unstable ankle peroneus longus (PL) and peroneus brevis (PB) reaction time and lateral (r = 0.63 and r = 0.81, respectively), medial (r = 0.74 and r = 0.76, respectively), andanterior PS (r = 0.56 and r = 0.55, respectively; P G 0.01). Conclusions: Results reveal postural sway deficits in ankles with FAI. They also demonstrate a significant relationship between PL and PB reaction times and postural sway in UA. Individuals who sustain an acute ankle sprain and those with FAI require rehabilitation that improves proprioception, strengthens the evertors and dorsiflexors, and restores peroneal reaction time.

AB - Purpose: To test the hypothesis that ankles with functional instability will demonstrate greater single-limb postural sway (PS) than their contralateral stable joint and stable healthy controls and to examine the relationship between single-limb postural sway and muscular reaction time to a simulated 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 12 single-limb PS tests, 3 on each leg with and without vision. Participants provided informed consent. Postural sway data are reported on the FAI group’s unstable (UA) and stable ankles (SA), and the control group’s dominant (DA) and nondominant ankles (NDA). Results: With vision, the UA and SA revealed similar postural control; however, the UA showed greater (P G 0.05) anteroposterior PS than the DA (0.46 cm) and the NDA (0.51 cm). Without vision, the UA showed greater (P G 0.05) medial(2.41 cm) and lateral (2.59 cm) PS than the SA and also showed greater (P G 0.05) medial (2.05 and 2.10 cm, respectively) and lateral (2.28 and 2.26 cm, respectively) than the DA and NDA. The relationship between PS and muscle reaction times, derived from the previous article was calculated. Significant correlations (P G 0.05) were found between the unstable ankle peroneus longus (PL) and peroneus brevis (PB) reaction time and lateral (r = 0.63 and r = 0.81, respectively), medial (r = 0.74 and r = 0.76, respectively), andanterior PS (r = 0.56 and r = 0.55, respectively; P G 0.01). Conclusions: Results reveal postural sway deficits in ankles with FAI. They also demonstrate a significant relationship between PL and PB reaction times and postural sway in UA. Individuals who sustain an acute ankle sprain and those with FAI require rehabilitation that improves proprioception, strengthens the evertors and dorsiflexors, and restores peroneal reaction time.

KW - Adult

KW - Ankle Injuries

KW - Biomechanics

KW - Humans

KW - Joint Instability

KW - Male

KW - Postural Balance

KW - Reaction Time

KW - Sprains and Strains

UR - http://www.scopus.com/inward/record.url?scp=58149329148&partnerID=8YFLogxK

U2 - 10.1249/MSS.0b013e31817356d6

DO - 10.1249/MSS.0b013e31817356d6

M3 - Article

C2 - 18614937

VL - 40

SP - 1522

EP - 1528

JO - Medicine and Science in Sports and Exercise

JF - Medicine and Science in Sports and Exercise

SN - 0195-9131

IS - 8

ER -