scholarly journals Analysis of Ankle Laxity, Self-reported Function, and Perceived Instability in Chronic Ankle Instability, Coper, and Control Groups

2021 ◽  
Vol 30 (1) ◽  
pp. 43-51
Author(s):  
Hongsuk Lee ◽  
Hyunsoo Kim ◽  
Ty Hopkins ◽  
S. Jun Son
Keyword(s):  
Ankle Instability ◽  
Pearson Correlation ◽  
Frontal Plane ◽  
Static Stability ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Control Groups ◽  
Ankle Arthrometer ◽  
Ankle Function ◽  
And Control

PURPOSE:This study aimed to identify differences in ankle laxity in chronic ankle instability (CAI), coper, and control groups, and a correlation between ankle laxity, self-reported function, and perceived instability.METHODS: Sixty-six participants (22 CAI patients, 22 copers, and 22 controls) selected by recommendations of the International Ankle Consortium volunteered for this study. Foot and Ankle Ability Measure Activities of Daily Living (FAAM-ADL), FAAM-Sports, and Ankle Instability Instrument (AII) were used to assess participants’ self-reported function and perceived instability. The FAAMADL and FAAM-Sports are reported as a percentage. Higher scores indicate better function. The AII is reported as “yes” responses while more “yes” responses indicate higher instability. Three trials of anterior/posterior (A/P) displacement and inversion/eversion (I/E) displacement were assessed by an instrumented ankle arthrometer. Greater displacement indicates higher laxity. The ankle positioned in sagittal- and frontal-plane neutral while A/P and I/E displacement were assessed with 125 N and 4 N-m, respectively. The means of three trials were used for data analysis. One-way ANOVA and Tukey post-hoc comparisons (α=0.05) were performed to identify differences in ankle laxity between groups. Pearson correlation analysis was performed to identify a relationship between ankle laxity, self-reported function, and perceived instability.RESULTS: CAI patients show greater A/P displacement compared to control group (p<.03), and greater I/E displacement compared to coper and control groups (p<.03). Several positive and negative correlations were found between ankle laxity, self-reported function, and perceived instability (p<.00).CONCLUSIONS: As self-reported function and perceived instability are correlated with greater laxity (I/E displacement), improving static stability (ankle laxity) may play an important role in improving perceived ankle function and instability in CAI.

scholarly journals Characterization of Multiple Movement Strategies in Participants With Chronic Ankle Instability

2019 ◽  
Vol 54 (6) ◽  
pp. 698-707 ◽  
Author(s):  
J. Ty Hopkins ◽  
S. Jun Son ◽  
Hyunsoo Kim ◽  
Garritt Page ◽  
Matthew K. Seeley
Keyword(s):  
Sagittal Plane ◽  
Ankle Instability ◽  
Vertical Jump ◽  
Frontal Plane ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Ground Reaction Forces ◽  
Sensorimotor Deficits ◽  
Movement Strategies ◽  
Reaction Forces

Context Chronic ankle instability (CAI) is characterized by multiple sensorimotor deficits, affecting strength, postural control, motion, and movement. Identifying specific deficits is the key to developing appropriate interventions for this patient population; however, multiple movement strategies within this population may limit the ability to identify specific movement deficits. Objective To identify specific movement strategies in a large sample of participants with CAI and to characterize each strategy relative to a sample of uninjured control participants. Design Descriptive laboratory study. Setting Biomechanics laboratory. Patients or Other Participants A total of 200 individuals with CAI (104 men, 96 women; age = 22.3 ± 2.2 years, height = 174.2 ± 9.5 cm, mass = 72.0 ± 14.0 kg) were selected according to the inclusion criteria established by the International Ankle Consortium and were fit into clusters based on movement strategy. A total of 100 healthy individuals serving as controls (54 men, 46 women; age = 22.2 ± 3.0 years, height = 173.2 ± 9.2 cm, mass = 70.7 ± 13.4 kg) were compared with each cluster. Main Outcome Measure(s) Lower extremity joint biomechanics and ground reaction forces were collected during a maximal vertical jump landing, followed immediately by a side cut. Data were reduced to functional output or curves, kinematic data from the frontal and sagittal planes were reduced to a single representative curve for each plane, and representative curves were clustered using a Bayesian clustering technique. Estimated functions for each dependent variable were compared with estimated functions from the control group to describe each cluster. Results Six distinct clusters were identified from the frontal-plane and sagittal-plane data. Differences in joint angles, joint moments, and ground reaction forces between clusters and the control group were also identified. Conclusions The participants with CAI demonstrated 6 distinct movement strategies, indicating that CAI could be characterized by multiple distinct movement alterations. Clinicians should carefully evaluate patients with CAI for sensorimotor deficits and quality of movement to determine the appropriate interventions for treatment.

MRI Identification of the Fibular and Talus Position in Patients with Mechanical Ankle Instability

2017 ◽  
Vol 38 (07) ◽  
pp. 546-550 ◽  
Author(s):  
Hong-Yun Li ◽  
Ru-Shou Zhou ◽  
Ying-Hui Hua ◽  
Shi-Yi Chen
Keyword(s):  
Ankle Instability ◽  
Axial Plane ◽  
Control Group ◽  
Medial Malleolus ◽  
Anatomic Variations ◽  
Mr Images ◽  
Control Groups ◽  
Significant Difference ◽  
And Control

AbstractSpecific anatomic variations of the ankle mortise may be found in people with ankle instability. The purpose was to evaluate the fibular and talus position in subjects with mechanical ankle instability (MAI). In this study, MR images of 54 patients with MAI and 51 patients from the author’s institution for reasons unrelated to ankle instability were reviewed. The position of the fibular in relation to the talus (axial malleolar index, AMI) and medial malleolus (intermalleolar index, IMI) were evaluated at the axial plane. Meanwhile, the rotation of the talus was measured and calculated using a new index, the Malleolar Talus Index (MTI), which is measured in relation to the medial malleolar. The results showed that the AMI in the MAI patients increased significantly when compared to that in the control group. However, there was no statistically significant difference in the IMI between instability and control groups. The MTI increased significantly in the MAI patients when compared to that in the control group. The conclusion was that the patients with MAI have more of an internally rotated talus than a variation of fibular position.

Analysis of Differences in Static Lower Extremity Alignment among Chronic Ankle Instability, Coper, and Control Groups

2021 ◽  
Vol 19 (2) ◽  
pp. 345-357
Author(s):  
Hyung Gyu Jeon ◽  
◽  
Inje Lee ◽  
Hee Seong Jeong ◽  
Byong Hun Kim ◽  
...  
Keyword(s):  
Lower Extremity ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Control Groups ◽  
Lower Extremity Alignment ◽  
And Control

Eversion Strength and Surface Electromyography Measures With and Without Chronic Ankle Instability Measured in 2 Positions

2017 ◽  
Vol 38 (7) ◽  
pp. 769-778 ◽  
Author(s):  
Lindsy Donnelly ◽  
Luke Donovan ◽  
Joseph M. Hart ◽  
Jay Hertel
Keyword(s):  
Surface Electromyography ◽  
Sagittal Plane ◽  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Neutral Position ◽  
Healthy Controls ◽  
Healthy Group ◽  
Peroneus Longus ◽  
And Control

Background: Individuals with chronic ankle instability (CAI) have demonstrated strength deficits compared to healthy controls; however, the influence of ankle position on force measures and surface electromyography (sEMG) activation of the peroneus longus and brevis has not been investigated. The purpose of this study was to compare sEMG amplitudes of the peroneus longus and brevis and eversion force measures in 2 testing positions, neutral and plantarflexion, in groups with and without CAI. Methods: Twenty-eight adults (19 females, 9 males) with CAI and 28 healthy controls (19 females, 9 males) participated. Hand-held dynamometer force measures were assessed during isometric eversion contractions in 2 testing positions (neutral, plantarflexion) while surface sEMG amplitudes of the peroneal muscles were recorded. Force measures were normalized to body mass, and sEMG amplitudes were normalized to a resting period. Results: The group with CAI demonstrated less force when compared to the control group ( P < .001) in both the neutral and plantarflexion positions: neutral position, CAI: 1.64 Nm/kg and control: 2.10 Nm/kg) and plantarflexion position, CAI: 1.40 Nm/kg and control: 1.73 Nm/kg). There were no differences in sEMG amplitudes between the groups or muscles ( P > .05). Force measures correlated with both muscles’ sEMG amplitudes in the healthy group (neutral peroneus longus: r = 0.42, P = .03; plantarflexion peroneus longus: r = 0.56, P = .002; neutral peroneus brevis: r = 0.38, P = .05; plantarflexion peroneus longus: r = 0.40, P = .04), but not in the group with CAI ( P > .05). Conclusions: The group with CAI generated less force when compared to the control group during both testing positions. There was no selective activation of the peroneal muscles with testing in both positions, and force output and sEMG activity was only related in the healthy group. Clinical relevance: Clinicians should assess eversion strength and implement strength training exercises in different sagittal plane positions and evaluate for other pathologies that may contribute to reduced eversion strength in patients with CAI. Level of Evidence: Level III, cross-sectional

Ankle Coordination in Chronic Ankle Instability, Coper, and Control Groups in Running

2020 ◽  
Vol 52 (3) ◽  
pp. 663-672
Author(s):  
YONG UNG KWON ◽  
KATHRYN HARRISON ◽  
SANG JIN KWEON ◽  
D. S. BLAISE WILLIAMS
Keyword(s):  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Control Groups ◽  
And Control

scholarly journals The Effectiveness of Note-Taking on Reading Comprehension of Iranian EFL Learners

2017 ◽  
Vol 6 (7) ◽  
pp. 308
Author(s):  
Farnoush Bahrami ◽  
Heidar Nosratzadeh
Keyword(s):  
Reading Comprehension ◽  
Pearson Correlation ◽  
Control Group ◽  
Note Taking ◽  
Control Groups ◽  
Efl Learners ◽  
Post Test ◽  
And Control ◽  
Experimental Group ◽  
Analyze Data

By taking notes students could save time for reading all textbooks for their exams or for their representations.  It helps them to be vigilant all the time in class for having good notes and they have to paying attention to lectures or teachers all the time, therefore note-taking causes to listening better to lessons and lectures an also it causes to improves their comprehension when they read texts. Thus, the present study is important because note-taking could provide student’s memorization and helps them to remember what they learnt, absolutely important information. Also it accelerates to one-over their studies.The method used in this research was survey. The 40 Persian EFL learners were selected from a language institute in Karaj to participate in the present study. These learners were divided into two groups; one of them is experimental group (N=20) and the other one is control group (N=20). Pretest and post test were two instruments that were used to carry out this study, a pretest about skill of note-taking of passages of the lessons was used for both experimental and control group. This test consisted of 4 passages. The same test was administrated again as the post test for both groups by the end of the course to see the different conclusion between taking note of experimental group and control group control groups. Reliability between 4 texts is in oscillation from 0.6 to 0.81 (from 0.6 upwards). Therefore this reliability was an acceptable one. To analyze data descriptive statistics (that was contained percentage, frequency and mean score) and also inferential statistics (that was contained ANOVA, Pearson correlation, independent sample t-test, multivariate’s test, regression) were carried out by using SPSS16 soft ware. The findings confirmed that note taking is effective in reading comprehension.

scholarly journals Effectiveness of Hospital-Based Systemic Rehabilitation in Improving Ankle Function after Surgery in Chronic Ankle Instability Patients

2021 ◽  
Vol 2021 ◽  
pp. 1-8
Author(s):  
Da Hye Kong ◽  
Gun Sang Lee ◽  
So Hee Park ◽  
Min Cheol Joo ◽  
Sung Hyun Lee ◽  
...  
Keyword(s):  
Activities Of Daily Living ◽  
Daily Living ◽  
Ankle Instability ◽  
Group Interaction ◽  
Intervention Group ◽  
Interaction Effects ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Pain Symptoms ◽  
Ankle Function

We investigated the therapeutic effect of a postoperative hospital-based systemic rehabilitation protocol on ankle function in chronic ankle instability (CAI) patients. Thirty-five patients who underwent a modified Broström procedure for CAI were recruited in this prospective randomized controlled trial. Fifty-minute sessions of hospital-based rehabilitation were performed three times weekly for 12 weeks in the intervention group. Education-based rehabilitation was conducted at home in the control group. The outcomes were evaluated at baseline (T0), 12 weeks (T1), and 16 weeks (T2). The primary outcome was the foot and ankle outcome score (FAOS). Ankle motor strength and spatiotemporal gait metrics were assessed as secondary outcomes. There were significant time and group interaction effects on the pain, symptoms, activities of daily living, sports activities, and quality of life (QOL) domains of the FAOS ( P < 0.05 , all). The patients in the intervention group showed larger improvements in all domains of the FAOS than did the control group at both T1 and T2 ( P < 0.05 , all). The time and group interaction effects on invertor and evertor strength were also significant ( P = 0.047 and P = 0.044 ). Invertor and evertor strength improved significantly more in the intervention group than in the control group at T1 and T2 ( P < 0.05 , all). The preferred walking velocity, cadence, step length on the affected side, and double stance phase duration tended to improve over time. Postoperative hospital-based rehabilitation helped improve CAI pain, symptoms, independence in activities of daily living, sports activity levels, and QOL more effectively than did conventional rehabilitation at home.

scholarly journals Neural Excitability and Joint Laxity in Chronic Ankle Instability, Coper, and Control Groups

2016 ◽  
Vol 51 (4) ◽  
pp. 336-343 ◽  
Author(s):  
Samantha Bowker ◽  
Masafumi Terada ◽  
Abbey C. Thomas ◽  
Brian G. Pietrosimone ◽  
Claire E. Hiller ◽  
...  
Keyword(s):  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Spinal Reflex ◽  
Hoffmann Reflex ◽  
Neural Excitability ◽  
Reflex Excitability ◽  
Total Displacement ◽  
Ankle Arthrometer ◽  
Healthy Control ◽  
And Control

Neuromuscular and mechanical deficiencies are commonly studied in participants with chronic ankle instability (CAI). Few investigators have attempted to comprehensively consider sensorimotor and mechanical differences among people with CAI, copers who did not present with prolonged dysfunctions after an initial ankle sprain, and a healthy control group.Context: To determine if differences exist in spinal reflex excitability and ankle laxity among participants with CAI, copers, and healthy controls.Objective: Case-control study.Design: Research laboratory.Setting: Thirty-seven participants with CAI, 30 participants categorized as copers, and 26 healthy control participants.Patients or Other Participants: We assessed spinal reflex excitability of the soleus using the Hoffmann reflex protocol. Participants' ankle laxity was measured with an instrumented ankle arthrometer. The maximum Hoffmann reflex : maximal muscle response ratio was calculated. Ankle laxity was measured as the total displacement in the anterior-posterior directions (mm) and total rotation in the inversion and eversion directions (°).Main Outcome Measure(s): Spinal reflex excitability was diminished in participants with CAI compared with copers and control participants (P = .01). No differences were observed among any of the groups for ankle laxity.Results: Changes in the spinal reflex excitability of the soleus that likely affect ankle stability were seen only in the CAI group, yet no mechanical differences were noted across the groups. These findings support the importance of finding effective ways to increase spinal reflex excitability for the purpose of treating neural excitability dysfunction in patients with CAI.Conclusion:

Sign in / Sign up

Export Citation Format

Share Document