Download or read book Role of Dynamic Postural Control Using Functional Movement Assessments in Individuals with Chronic Ankle Instability written by Jordan W. Legendre and published by . This book was released on 2020 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: Our objective was to evaluate the effects of ankle support devices on kinematic and kinetic characteristics during walking and running in people with chronic ankle instability (CAI). For the case-control study, the primary purpose was to identify differences among measures of active range of motion (AROM), dynamic postural stability, and FMS-lower extremity scores in physically-active persons with and without CAI. A secondary purpose was to identify risk factors that predispose individuals to CAI.

Download or read book Performance in Static Dynamic and Clinical Tests of Postural Control in Individuals with Functional Ankle Instability written by Lyn H. Nakagawa and published by . This book was released on 2002 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objectives: To evaluate postural control in individuals with functional ankle instability using static, dynamic, and clinical balance tests. Also, to examine the relationships between the performances in each of these tests. Design: Postural control was evaluated with a single leg balance test, a balance test involving movement, and the star excursion balance test. Participants: A volunteer sample of 19 subjects with functional ankle instability and 19 uninjured control subjects. Main Outcome Measures: Center of pressure sway path length was calculated for the static and dynamic balance tests. Total reach distance was measured for the star excursion balance test. Results: Subjects with functional ankle instability demonstrated a significantly greater center of pressure sway path length in both the static and dynamic balance tests. Conclusions: Functional ankle instability may be associated with reduced postural control as demonstrated by decreased performance in static and dynamic balance tests.

Download or read book Dynamic Postural Stability During Gait Initiation in Individuals with Chronic Ankle Instability written by Elizabeth Irene Raycraft and published by . This book was released on 2009 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Chronic ankle instability (CAI) is associated with deficits in strength, balance, and static postural stability, however dynamic postural stability during transitional movements have received limited investigations. The purpose of this study was to assess dynamic postural stability in individuals with CAI during varying speeds of gait initiation (GI). There were twenty eight voluntary subjects, 14 (M8:F6) subjects with CAI and 14 (M8:F6) control subjects (healthy young athletes, HYA). CAI was assessed using the Foot and Ankle Ability Measure (FAAM) tool. Control subjects had no history of any LAS. Data was collected using two non-conducting forceplates and an electromagnetic tracking system. Subjects performed five trials of each task, first normal speed GI and then fast speed GI. There were no significant differences noted for both A/P and M/L movement and velocity of COP during S1. There were also no significant differences between groups for initial step length or initial step velocity. Lastly, there were no significant differences found between groups for COP-COM at the end of single support phase of gait. The results of this study suggest that GI may not be a challenging enough task to evoke deficits in postural control in individuals with CAI. The GI motor program likely remains unaffected by the development of CAI and these individuals are likely able to compensate for any functional deficits they may experience. Future research should investigate these motor programs using EMG data and also possibly secondary tasks that may challenge these individuals more.

Download or read book Biomechanics of Functional and Dynamic Tasks in Individuals with Chronic Ankle Instability written by Jeffrey Daniel Simpson and published by . This book was released on 2018 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chronic ankle instability (CAI), a pathological condition characterized by repetitive bouts of the ankle giving way, commonly develops following a lateral ankle sprain injury. Individuals with CAI have been shown to exhibit deficits in postural control and alterations in movement dynamics, which have been suggested to be contributing factors to the recurrent injury paradigm. The purpose of this investigation was to conduct a comprehensive biomechanical analyses to examine the influence of CAI on postural control and movement dynamics during a single leg squat, side-cut task, and single leg landing on an inverted surface. Fifteen participants with CAI and fifteen participants without CAI completed the study following a between-subjects design, with limb serving as the repeated measure during the single leg squat. Each participant completed a single leg squat, side-cut task, and unexpected and expected single leg landings on a tilted surface. Results from the single leg squat and single leg landings on the tilted surface were analyzed using a 2 x 2 mixed-model ANOVA, while results from the side-cut task were analyzed using an independent samples t-test. Statistical significance was considered for all dependent variables when p

Download or read book Biomechanics of Functional and Dynamic Tasks in Individuals with Chronic Ankle Instability written by and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Chronic ankle instability (CAI), a pathological condition characterized by repetitive bouts of the ankle giving way, commonly develops following a lateral ankle sprain injury. Individuals with CAI have been shown to exhibit deficits in postural control and alterations in movement dynamics, which have been suggested to be contributing factors to the recurrent injury paradigm. The purpose of this investigation was to conduct a comprehensive biomechanical analyses to examine the influence of CAI on postural control and movement dynamics during a single leg squat, side-cut task, and single leg landing on an inverted surface. Fifteen participants with CAI and fifteen participants without CAI completed the study following a between-subjects design, with limb serving as the repeated measure during the single leg squat. Each participant completed a single leg squat, side-cut task, and unexpected and expected single leg landings on a tilted surface. Results from the single leg squat and single leg landings on the tilted surface were analyzed using a 2 x 2 mixed-model ANOVA, while results from the side-cut task were analyzed using an independent samples t-test. Statistical significance was considered for all dependent variables when p

Download or read book The Effects of Functional Activity on Postural Control and Lower Leg Strength of Ankle Function written by Phillip H. Andre and published by . This book was released on 2005 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Hip Rehabilitation Intervention on Dynamic Postural Control and Self reported Ankle Impairment in Patients with Chronic Ankle Instability written by Samantha Boland and published by . This book was released on 2013 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: The objective of this study was to determine the effectiveness of two intervention programs focusing on proximal alterations or distal alterations on improving dynamic postural control and self-reported disability in patients with chronic ankle instability (CAI). Design and Setting: A double blinded, randomized control trial was conducted in a laboratory setting. Subjects: Twelve patients with CAI were randomly assigned to an Ankle intervention group (4 males, 2 females; 21.5±2.81 years; 176.74±10.91 cm; 83.14±20.85 kg), or to an Ankle/Glut intervention group (2 males, 4 females; 19.5±1.52 years; 168.48±7.82 cm; 80.74±27.63 kg). Procedure: Experimental measures were measured pre- and post-intervention period. All participants filled out the Foot and Ankle Ability Measure (FAAM) and FAAM Sport during pre- and post-testing to test for improvement in self-reported function following the intervention. The Star Excursion Balance Test (SEBT) and Time to Stabilization (TTS) were tools used to assess dynamic postural control. Lastly, the participant's hip abduction strength (HABD) and external rotation strength (ER) were determined using a hand-held dynamometer. Hip ER was tested in a seated position, while HABD was tested in a sidelying position. Participants were randomly assigned to the Ankle or Ankle/Glut intervention group and took part in a four-week exercise program. The Ankle intervention group participated in traditional ankle rehabilitation of four directional therabands, wobbleboard, and single-leg balance exercises, whereas the Ankle/Glut intervention group took part in the same traditional ankle rehabilitation along with gluteal exercises of rotational lunges and rotational squats. Both groups met twice a week, for approximately 20 minute sessions, with the first exercise intervention occurring immediately following pre-testing of outcome measures and the day prior to post-testing after four-weeks. During the first week, the gluteal exercises were performed with no resistance. During the 2-4 weeks of the intervention, participants wore a weight vest to which 5% of body mass was added each week, resulting in resistances of 5%, 10%, and 15% of body mass during weeks 2, 3, and 4, respectively, of the intervention. Significance was detemined using dependent t-tests between pre and post values (p

Download or read book Influence of Direction on Stepping Parameters and Postural Stability in Individuals with Chronic Ankle Instability written by Jennifer Tolson and published by . This book was released on 2009 with total page 101 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Lateral ankle sprains are a common athletic injury accounting for 25-50% of injuries in sports that include running and jumping. Individuals who suffer from a lateral ankle sprain may develop residual symptoms of chronic ankle instability (CAI). CAI research has examined static and dynamic to static movements and unidirectional tasks; however, static to dynamic transitional movements remains largely unexplored in this population. Therefore, the purpose of this study was to evaluate dynamic postural stability during directional gait initiation in healthy young athletes (HYA) and athletes with CAI. There were no significant differences between the two groups for forward and directional gait initiation for center of pressure-center of mass separation at heel strike minus one, posterior and lateral displacement of the center of pressure during S1, step length, step velocity, and posterior and lateral velocity of the center of pressure during S1, We concluded that gait initiation at a 90° step angle may not be a challenging enough task to alter dynamic postural stability in those with CAI.

Download or read book Handbook of Balance Function Testing written by Gary P. Jacobson and published by Singular. This book was released on 1997 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: An introductory reference on balance function testing for clinicians and technicians who assess patients with balance system disorders. Part I provides a historical framework for understanding the evolution of balance function testing. Part II begins with an overview of the anatomy and physiology of the vestibular system and principles of electro-oculography, then focuses on subtests comprising the ENG test battery. Parts III and IV describe rotational and CDP test techniques, and Part V addresses special issues such as medical and surgical treatment and assessment. Includes bandw diagrams. Annotation copyrighted by Book News, Inc., Portland, OR

Download or read book Kinematic Patterns on the Star Excursion Balance Test and Y balance Test and Postural Stability in Individuals with Chronic Ankle Instability written by Jupil Ko and published by . This book was released on 2016 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt: Background: The star excursion balance test (SEBT) and Y-balance test (YBT) are similar tests that have been commonly applied to assess dynamic postural stability deficits in the Chronic Ankle Instability (CAI) population. However, they could in fact require different task performance and/or movements to assess dynamic postural stability, as they use different measuring techniques and one uses a platform. The purposes of this study were to determine if there is a significant difference in performance in the kinematic patterns of CAI and control groups on the SEBT and the YBT, and to determine if there is a significant difference in dynamic postural control stability between the groups while performing the SEBT. Methods: 70 participants (35 in the CAI and 35 in the control group) performed in the Anterior (AN), Posteromedial (PM), and Posterolateral (PL) directions of the SEBT (on the single force plate) and the YBT. Also, the kinematics of hip, knee, and ankle joint in sagittal, frontal, and transverse planes were calculated and analyzed. Center of Pressure (COP) data with a sampling rate of 180Hz were collected while performing the SEBT. Findings: Compared with the control group, the CAI group achieved significantly shorter reach distance in the AN and PM reach directions on the SEBT. On the YBT, the CAI group had significantly shorter reach distance in the PM and PL directions compared with the control group. In the CAI group, participants had significantly greater reach distance in the PL direction on the YBT compared with the SEBT. Comparing performance on the SEBT and YBT within each group, significant differences in angular displacement and joint angle at the point of maximum reach at the hip, knee, and ankle in 3 planes were observed. The CAI group had significantly lower A-P COPSD (cm) and COPA-95 (cm2) than the control group while performing the SEBT in the AN, PM, and PL reach directions. Interpretation: Clinicians and researchers should not apply these dynamic postural control tasks interchangeably or compare reach distances from one task to another. Also, clinicians may need to incorporate rehabilitation techniques to challenge COP control during dynamic balance tasks.

Download or read book Impairment in Dynamic Postural Control Following an Acute Lateral Ankle Sprain written by Anne Lorene Bryan and published by . This book was released on 2012 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: Author's abstract: Lateral ankle sprains are the most common injury in sports, with an estimated 25,000 per day. Current research assesses postural control deficits following lateral ankle sprains; however most studies use static stances instead of dynamic stances. Most of the current research compares injured limb to non-injured limb, however bilateral impairments have been found to be present. Twenty Division I student athletes will be recruited to participate in this study, ten subjects will be NCAA Division I student athletes who have suffered a lateral ankle sprain. Control subjects will be healthy NCAA Division I student athletes, matched by height and gender with the injured subjects. Dynamic postural control will be evaluated by gait initiation, which will be assessed using the Vicon system and then compared to matched healthy control values. MANOVA revealed no significant difference in dynamic postural control following a lateral ankle sprain when compared to control group. Significant differences were found in range of motion assessment as well as perceived function assessment.

Download or read book Effects of Joint Mobilization on Ankle Dorsiflexion Range of Motion Dynamic Postural Control and Self reported Patient Outcomes in Individuals with Chronic Ankle Instability written by Ashley M. Wells and published by . This book was released on 2012 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: The purpose of this study was to evaluate the effects of joint mobilization on ankle dorsiflexion range of motion, dynamic postural control, and self-reported patient outcomes in individuals with chronic ankle instability (CAI). A secondary purpose was to determine which contributing factor or factors can improve a participant's performance on the Star Excursion Balance Test. Design: This research study was a single-blinded, randomized control trial with one between factor (2 levels: intervention and control) and one within factor (pre- and post-intervention). Participants: Seventeen participants with self-reported unilateral CAI, between 18 and 35 years of age, were recruited from the University of Toledo community and were randomly allocated to two groups, intervention and control. Methods: Participants completed one testing session that included a non-weight bearing dorsiflexion measurement using a bubble inclinometer, a weight-bearing dorsiflexion measurement using the Weight Bearing Lunge Test and dynamic postural control measured by the Star Excursion Balance Test (SEBT) pre- and post-intervention. The intervention consisted of a Maitland Grade IV oscillatory anterior-to-posterior talar joint mobilization. Main Outcome Measures: The main outcome measures were dorsiflexion range of motion, dynamic postural control and self-reported patient outcomes. Factors contributing to the performance of the SEBT in individuals with CAI were also determined. Statistical Analysis: The means and standard deviations of the absolute change scores were used for statistical analysis. The independent sample t-test was used to compare each dependent variable between the intervention and control groups. A Cohen's d effect size along with 95% confidence intervals (CI) was calculated for each comparison between groups and between pre-and post-intervention measurements to determine the magnitude of the joint mobilization effect. A multiple linear backward regression model analysis was also performed to determine which dependent variables influence the improvement of the SEBT performance. Results: There were no statistically significant results for the main outcome measures. However, large effect sizes were identified for the anterior reach of the SEBT, non-weight bearing dorsiflexion and a reduction in pain when comparing the two groups. A large effect size was also determined for non-weight bearing dorsiflexion, pain, and stability when comparing pre- and post-intervention scores for the joint mobilization group and for weight-bearing dorsiflexion for the control group. Conclusion: A single dose of a Maitland Grade IV anterior-posterior talar glide joint mobilization did not result in statistically significant improvements in DF range of motion, dynamic postural control, and self-reported patient outcomes, but some of the outcome measures resulted in large effect sizes. This indicates that joint mobilizations may provide potential clinical benefits for the improvement in DF range of motion, dynamic postural control, and pain in patients with CAI.

Download or read book Effects of Balance Training on Postural Control Gait and Function in Those with Chronic Ankle Instability written by Patrick Owen McKeon and published by . This book was released on 2007 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: In conclusion, this randomized controlled trial revealed that individuals with CAI who completed a supervised 4 week dynamic balance training program had significant improvements in self-reported function, static and dynamic postural control, and gait kinematics.

Download or read book Lateral Ankle Instability written by Hélder Pereira and published by Springer Nature. This book was released on 2021-04-28 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: This superbly illustrated, up-to-date reference textbook covers all aspects of ankle instability and its management. Readers will find extensive information on biomechanics, injury prevention, current strategies for conservative treatment, and established and emerging surgical techniques. The most recent procedures, particularly those which are minimally invasive and arthroscopically assisted, are described and discussed in depth. Detailed attention is also devoted to controversies such as the indications and timing for conservative or surgical treatment, the current and future roles of arthroscopy, the definition of “anatomic” repair, and the upcoming concept of “anatomic reconstruction” (replication of anatomy by using a graft). The book is published in cooperation with ESSKA, and the chapter authors include clinicians and scientists working in the field of foot and ankle orthopaedics and sports medicine from across the world. All who are involved in the care of patients suffering from ankle instability, including amateur and high-level athletes, will find Lateral Ankle Instability to be an excellent source of knowledge and a valuable aid to clinical practice.

Download or read book A Comparison of Excitability Measures ROM Laxity and Dynamic Postural Control Between Ankle Copers and Patients with Chronic Ankle Instability and Their Influences on Dynamic Postural Control written by Samantha Bowker and published by . This book was released on 2014 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: Context: Mechanical and neuromuscular deficiencies are commonly studied in participants with chronic ankle instability (CAI). Recent evidence suggests mechanical laxity alone may not characterize the condition of CAI. Alterations in the central nervous system (CNS) following ankle sprains are likely to characterize the condition of CAI, yet few studies have quantified CNS alterations directly in CAI populations. Ankle sprain copers are individuals that do not present with prolonged dysfunctions following an initial ankle sprain. There have been limited examination of CNS alterations in patients with ankle sprain history, and to our knowledge none that have attempted to comprehensively consider CNS and mechanical differences between CAI, ankle copers, and healthy control groups. Objective: Determine if differences exist in spinal reflex excitability and ankle laxity between ankle sprain copers, CAI patients, and healthy controls. To identify which variables best predict performance on the star excursion balance test (SEBT) for each group. Design: Case control study. Setting: Research laboratory. Patients or Other Participants: Thirty-five participants with CAI (17M, 18F; 21.97±3.55yrs; 169.26±8.35cm; 72.40±14.79kg), 26 participants categorized as ankle sprain copers (10M, 16F; 21.50±4.17yrs; 168.35±10.83cm; 73.22±19.84kg) and 22 healthy control participants (8M, 14F; 21.45±3.43yrs; 166.75±7.63cm; 67.07±13.50kg) volunteered. Interventions: Spinal reflex excitability was assessed using Hoffman reflex (H-reflex) testing. Participants' ankle laxity was measured with an ankle arthrometer. Corticomotor excitability was assessed using transcranial magnetic stimulation (TMS). Range of motion was assessed using the weight bearing lunge test (WBLT) and open kinetic chain dorsiflexion (OKCDF) was assessed using a bubble inclinometer. Dynamic postural control was assessed using the SEBT. Main Outcomes: Spinal reflex excitability was assessed for the maximal H-reflex and muscle-response, from which the H:M ratio was calculated. Ankle laxity was measured as the total displacement in the anterior-posterior directions (mm) and total motion in the eversion-inversion directions (degrees). Corticomotor excitability was analyzed using active motor threshold (AMT) and silent periods (SP). Dorsiflexion was measured as distance from the wall during the WBLT (cm) and as possible range of motion for OKCDF (deg). Normalized reach distances for the anterior, posterolateral, and posteromedial reach distances of the SEBT. One-way ANOVAs were used to make groups comparisons for each dependent variable. Significance was set a priori at P

Download or read book Structural and Functional Adaptations of Ankle Stability Do Not Affect Symptomatic Response and Clinical Outcome written by Erik A. Wikstrom and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: ABSTRACT: Lateral ankle sprains are the most common orthopedic injury in the United States. More than 70% of people who sprain their ankle will have a recurrent episode and about 50% will develop ankle instability. This disability decreases quality of life by limiting the activities that individuals can perform comfortably and with confidence. However, it is unclear why some people can inherently compensate or cope (copers) and others cannot (non-copers). This investigation explored structural and functional adaptations among copers and non-copers to determine how those adaptations might influence symptomatic response and performance based clinical tests. Specifically, we examined the structural (fibula position relative to the tibia and ligament stiffness) as well as functional adaptations (static and dynamic postural control) among the two patient populations and a control group. A total of 72 subjects were recruited (24 in each patient group and 24 healthy controls) and underwent a series of lateral radiographic (x-ray) images and a joint stiffness test of both the right and left ankle followed by a static and dynamic balance test. The results indicated that non-copers had significantly increased disability as shown by the FADI, FADI Sport, and SRQAF. Similarly, both copers and non-copers had increased joint stiffness when compared to healthy controls. In addition, differences in static and dynamic postural stability were revealed. However, the secondary variables examined in this investigation appear to have little influence on the primary outcome variables. However, none of the performance based clinical tests or secondary variables related to the inclusionary criteria or self-report symptoms of disability, which indicates the need to reexamine the variables that we have based our ankle instability research on.

Download or read book The Effect of Chronic Ankle Instability on Lower Extremity Frontal plane Kinematics and Plantar Pressure During a Dynamic Postural Control Task written by Ara Wittwer and published by . This book was released on 2012 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Objective: To assess the effects of CAI on frontal-plane kinematics of the hip, knee, and ankle as well as on plantar pressure distribution during the anterior reach of the Star Excursion Balance Test (SEBT) and identify possible relationship between altered kinematics and plantar pressure distribution. Design: A case control design with one between-subjects factor (Group) and one within-subjects factor (Side). Participants: Nine subjects with history of unilateral CAI and 9 healthy subjects. Methods: Subjects participated in one testing session and performed the anterior reach of the SEBT. Main Outcome Measures: Joint angles of the hip, knee, and ankle were quantified at the point of maximum SEBT reach. The medial to lateral (M:L) plantar pressure distribution was determined for the rearfoot, midfoot, and forefoot at the point of maximum reach. Normalized anterior reach distance was measured. Foot posture was assessed using the foot posture index 6 (FPI-6). Statistical Analysis: The means and standard deviations of the dependent variables at the point of maximum anterior reach distance for the 5 trials were used for comparison. A two-way analysis of variance was performed to determine if statistically significant interactions were present. An alpha level of .05 was set a priori. Two-tailed t-tests were performed post hoc if significance was found to examine differences between each dependent variable within sides and between groups. Bivariate correlations were calculated using Pearson product moment correlations between all dependent variables on the involved side of the subjects with CAI, on the uninvolved side of the subjects with CAI, the involved side of the healthy subjects, on the uninvolved side of the healthy subjects. Results: The CAI group demonstrated more inversion at the ankle on the injured side (0.13 ± 4.48, p = 0.01) than the matched, healthy control ( -12.21 ± 4.25) during the anterior reach of the SEBT. A less valgus angle was demonstrated at the knee of the CAI group (2.26 ± 6.46, p = 0.01) than the matched, healthy control (11.77 ± 11.00). Participants with CAI demonstrated a shorter normalized anterior reach distance on the injured side (59.06 ± 6.41, p = 0.036) than the matched, healthy control (66.98 ± 5.83). Although there were no statistically significant main effects or interactions for M:L plantar pressure distribution, the effect sizes for side by group interactions at the rearfoot (d = 1.07) and midfoot (d = 0.85) between the injured limb of the CAI group and matched limb of the control group were large. Pairwise correlations between kinematics, foot segments, and reach distance revealed that kinematics at the hip were significantly correlated with knee kinematics (p = 0.007) and that rearfoot plantar pressure was significantly correlated with forefoot plantar pressure (p = 0.046). Conclusion: We found altered kinematics in the frontal-plane at the knee and ankle. These findings support the conclusions of previous studies that suggest rehabilitation protocols following ankle sprain should incorporate proximal joint exercises.