|Title:||Why Do Ankle Sprains Recur?|
|Keywords:||Index ankle sprain|
Recurrent ankle sprain
Limb laterality recognition task
|Publisher:||University of Sydney.|
Faculty of Health Sciences.
|Abstract:||The first objective of this thesis was to determine the predictors of recurrent sprain after an index ankle sprain. Findings of our comprehensive systematic review of the literature demonstrated a scientific gap with regards to predictors of chronic ankle instability (CAI) after an index sprain. The second and third studies therefore, were designed to investigate what impairments after an index sprain predispose participants to recurrent sprains. Participants with a recent index sprain (n=30) and controls (n=70) were recruited. Ankle joint range of motion (ROM), balance, proprioception, motor planning, inversion/eversion peak power, and timed stair tests were measured and compared between two groups. Participants were then followed up for 12 months and occurrence of ankle sprains was recorded. Younger participants with an index sprain found to be at significantly higher risk of incurring recurrent sprains. Although impaired balance was evident after an index sprain, balance deficits did not independently predict the likelihood of ankle sprain. The second aim of this thesis was to investigate the physical, physiological, functional and central differences among participants with CAI (n=42), copers (participants who recovered from a sprain, n=19) and controls (n=21). Ankle joint laxity and ROM, balance, proprioception, motor planning, timed stair test, peak power, and cortical representation of the foot and ankle measured by limb laterality recognition task, were compared among the three groups. The groups did not demonstrate any significant differences across ranges variables measured. However, deficits in inversion/eversion, balance, and performance in limb laterality recognition task were associated with pain at the ankle joint. Further, proprioceptive deficits were present in participants regardless of a history of ankle sprain and were associated with centrally mediated changes shown by bilateral impairments in performance of limb laterality recognition task.|
|Access Level:||Access is restricted to staff and students of the University of Sydney . UniKey credentials are required. Non university access may be obtained by visiting the University of Sydney Library.|
|Rights and Permissions:||The author retains copyright of this thesis. It may only be used for the purposes of research and study. It must not be used for any other purposes and may not be transmitted or shared with others without prior permission.|
|Type of Work:||PhD Doctorate|
|Type of Publication:||Doctor of Philosophy Ph.D.|
|Appears in Collections:||Sydney Digital Theses (University of Sydney Access only)|
|Pourkazemi_F_Thesis.pdf||3.68 MB||Adobe PDF|
Items in Sydney eScholarship Repository are protected by copyright, with all rights reserved, unless otherwise indicated.