Loss of proprioception or motor control is not related to functional ankle instability: an observational study (original) (raw)
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Relationship Between Functional Ankle Instability and Postural Control
Journal of Orthopaedic & Sports Physical Therapy, 2008
Instability and Postural Control ateral ankle sprain is common in sports that involve highvelocity and high-impact movements such as jumping, hopping, and cutting. One of the consequences of lateral ankle sprain is ongoing instability, which can be mechanical, functional, or both. 4,11 Functional ankle instability (FAI) is characterized by symptoms of giving way, weakness, pain, and impaired function. 9,17 Though FAI has been linked to impairments in postural control, 15,34 = .05 and .009, respectively).
Bilateral Proprioceptive Evaluation in Individuals With Unilateral Chronic Ankle Instability
Journal of athletic training, 2017
Despite extensive research on chronic ankle instability, the findings regarding proprioception have been conflicting and focused only on the injured limb. Also, the different components of proprioception have been evaluated in isolation. To evaluate bilateral ankle proprioception in individuals with unilateral ankle instability. Cohort study. Research laboratory center in a university. Twenty-four individuals with a history of unilateral ankle sprain and chronic ankle instability (mechanical ankle instability group, n = 10; functional ankle instability [FAI] group, n = 14) and 20 controls. Ankle active and passive joint position sense, kinesthesia, and force sense. We observed a significant interaction between the effects of limb and group for kinesthesia (F = 3.27, P = .049). Increased error values were observed in the injured limb of the FAI group compared with the control group (P = .031, Cohen d = 0.47). Differences were also evident for force sense (F = 9.31, P &l...
Fisioterapia e Pesquisa, 2015
23 Comparison of strength and proprioception parameters between subjects with and without functional ankle instability Comparacao dos parâmetros de forca e propriocepcao entre individuos com e sem instabilidade funcional de tornozelo Comparacion entre los parametros de fuerza y propiopercepcion entre sujetos con y sin inestabilidad funcional del tobillo Fernanda Cristina Milanezi1, Nise Ribeiro Marques2, Adalgiso Coscrato Cardozo3, Mauro Goncalves4
Mechanical stability, muscle strength and proprioception in the functionally unstable ankle
Australian Journal of Physiotherapy, 1994
Functional instability of the ankle is common following inversion sprain. Factors suggested as causes of this disability include mechanical instabilityofthetalocrural joint, peroneal muscle weakness and motor incoordination due to impaired proprioception. This study documented physical examination characteristics of functionally unstable ankles relevant to these theories. Each ankle of 45 subjects with unilateral functional instability was examined. Mechanical stability was assessed by standard clinical instability tests. Evertor and invertor muscle strength was measured using the Cybex II dynamometer. The Uni-axial Balance Evaluator (UBE) was used to assess dynamic control ofthe ankle and was considered capab:a of detecting unilaterally impaired proprioception. Mechanical instability was frequently absent in the functionally unstable ankles tested. Evertor muscle strength was similar in the normal and functionally unstable ankles. UBE results were consistent with the theory of impaired proprioception contributing to functional instability, but the need for further research is emphasised. [Ryan LG: Mechanical stability, muscle strength and proprioception in the functionally unstable ankle.
Commentary: Functional Ankle Instability Revisited
Journal of athletic training, 2002
hronic ankle instability is a clinical problem frequently seen in athletes. Various complicated mechanical and neuromuscular factors seem to be involved in chronic ankle instability. The purpose of this special communication is to revisit the concept of functional ankle instability and to discuss its clinical relevance. The 2 hypothesized causes of chronic ankle instability have been labelled mechanical instability and functional instability. Mechanical instability (MI) is defined as ankle movement beyond the physiologic limit of the ankle's range of motion. The term ''laxity'' is often used synonymously with MI. Functional instability (FI) is defined as the subjective feeling of ankle instability or recurrent, symptomatic ankle sprains (or both) due to proprioceptive and neuromuscular deficits. FUNCTIONAL BIOMECHANICS OF ANKLE INSTABILITY
The effects of functional instability of the ankle joint on balance
Physiotherapy Practice and Research, 2015
Background: Individuals who suffer from ankle instability may experience restricted movement and a weakening of the muscles that support the ankle. Purpose: The aim of this study was to investigate the effects of functional instability of the ankle joint on static and dynamic balance performances. Basic Methods Twenty-five participants (8 male, 17 female) were recruited for this study. The subjects were divided into two groups: an ankle instability and a normal ankle stability group. The static and dynamic limits of stability performance were assessed in single leg standing using the BioRescue device. In addition, the Functional Reach Test (FRT) and the Modified Functional Reach Test (MFRT) were also recorded. Main Results Significant differences between the two groups were found in the moving distance and the mean velocity of the center of pressure during the single leg standing test, the pendular limits of stability test, and the MFRT. However, the FRT showed no significant difference between the two groups. The results showed that the static and dynamic balance performances were reduced in the ankle instability group compared with the control group. Principal Conclusion Both the MFRT and BioRescue were sensitive and appropriate to pick clinically important differences between the two groups. The use of the MFRT is a quick and inexpensive clinical 3 measure of postural instability relevant to individuals with ankle instability. Further studies should use the MFRT to determine the effectiveness of clinical interventions for ankle instability that target improvements in balance.
Chronic Ankle Instability Does Not Affect Lower Extremity Functional Performance
Journal of athletic training, 2002
OBJECTIVE: To determine if functional performance is impaired in individuals with self-reported chronic ankle instability. DESIGN AND SETTING: We used a between-groups design to assess 3 functional variables. All data were collected at a Division III college and a military academy. Before testing, all subjects performed a 5-minute warm-up, followed by a series of stretches for the lower extremity muscles. Subjects then performed cocontraction, shuttle run, and agility hop tests in a counterbalanced fashion. Three trials for each functional test were completed and averaged for analysis. SUBJECTS: Twenty men with a history of at least 1 significant ankle sprain and episodes of at least 1 repeated ankle injury or feelings of instability or "giving way" were compared with 20 men with no prior history of ankle injury. Subjects were matched by age, height, weight, and activity level. MEASUREMENTS: Time to completion was measured in seconds for the cocontraction and the shuttle r...
Functional-Performance Deficits in Volunteers With Functional Ankle Instability
Journal of Athletic Training, 2005
contributed to conception and design; acquisition and analysis and interpretation of the data; and drafting, critical revision, and final approval of the article. Brent L. Arnold, PhD, ATC, contributed to conception and design; analysis and interpretation of the data; and drafting, critical revision, and final approval of the article. Bruce M. Gansneder, PhD, contributed to conception and design; analysis and interpretation of the data; and critical revision and final approval of the article.