P1 Kinematic difference during anticipated and unanticipated cut following drop landings in individuals with chronic ankle instability and healthy controls

Abstract Background The application of ankle braces is an effective method for the prevention of recurrent ankle sprains. It has been proposed that the reduction of injury rates is based on the mechanical stiffness of the brace and on beneficial effects on proprioception and neuromuscular activation. Yet, how the neuromuscular system responds to the application of various types of ankle braces during highly dynamic injury-relevant movements is not well understood. Enhanced stability of the ankle joint seems especially important for people with chronic ankle instability. We therefore aimed to analyse the effects of a soft and a semi-rigid ankle brace on the execution of highly dynamic 180° turning movements in participants with and without chronic ankle instability. Methods Fifteen participants with functional ankle instability, 15 participants with functional and mechanical ankle instability and 15 healthy controls performed 180° turning movements in reaction to light signals in a cross-sectional descriptive laboratory study. Ankle joint kinematics and kinetics as well as neuromuscular activation of muscles surrounding the ankle joint were determined. Two-way repeated measures analyses of variance and post-hoc t-tests were calculated. Results Maximum ankle inversion angles and velocities were significantly reduced with the semi-rigid brace in comparison to the conditions without a brace and with the soft brace (p ≤ 0.006, d ≥ 0.303). Effect sizes of these reductions were larger in participants with chronic ankle instability than in healthy controls. Furthermore, peroneal activation levels decreased significantly with the semi-rigid brace in the 100 ms before and after ground contact. No statistically significant brace by group effects were found. Conclusions Based on these findings, we argue that people with ankle instability in particular seem to benefit from a semi-rigid ankle brace, which allows them to keep ankle inversion angles in a range that is comparable to values of healthy people. Lower ankle inversion angles and velocities with a semi-rigid brace may explain reduced injury incidences with brace application. The lack of effect of the soft brace indicates that the primary mechanism behind the reduction of inversion angles and velocities is the mechanical resistance of the brace in the frontal plane.

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Ankle-knee coupling responses to ankle Kinesio™ taping during single-leg drop landings in collegiate athletes with chronic ankle instability

The Journal of Sports Medicine and Physical Fitness ◽

10.23736/s0022-4707.20.11264-7 ◽

2021 ◽

Vol 61 (4) ◽

Author(s):

Javad SARVESTAN ◽

Peyman AGHAIE ATAABADI ◽

Zdeněk SVOBODA ◽

Zuzana KOVAČIKOVA ◽

Alan R. NEEDLE

Keyword(s):

Ankle Instability ◽

Collegiate Athletes ◽

Chronic Ankle Instability ◽

Drop Landings

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Lower-extremity Biomechanics During A Drop-vertical Jump In Chronic Ankle Instability And Healthy Controls

Medicine & Science in Sports & Exercise ◽

10.1249/01.mss.0000487174.82381.17 ◽

2016 ◽

Vol 48 ◽

pp. 724 ◽

Cited By ~ 1

Author(s):

Christopher C. Herb ◽

Kaitlyn Grossman ◽

Mark Feger ◽

Luke Donovan ◽

Jay Hertel

Keyword(s):

Lower Extremity ◽

Ankle Instability ◽

Vertical Jump ◽

Chronic Ankle Instability ◽

Healthy Controls ◽

Lower Extremity Biomechanics ◽

Drop Vertical Jump

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Dry Needling Improves Dynamic Balance in Individuals With Chronic Ankle Instability More Than Healthy Controls

Archives of Physical Medicine and Rehabilitation ◽

10.1016/j.apmr.2019.08.041 ◽

2019 ◽

Vol 100 (10) ◽

pp. e20

Author(s):

Jennifer Mullins

Keyword(s):

Ankle Instability ◽

Dynamic Balance ◽

Chronic Ankle Instability ◽

Healthy Controls ◽

Dry Needling

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Patient-Reported Outcome Measures in Individuals With Chronic Ankle Instability: A Systematic Review

Journal of Athletic Training ◽

10.4085/1062-6050-50.9.01 ◽

2015 ◽

Vol 50 (10) ◽

pp. 1019-1033 ◽

Cited By ~ 58

Author(s):

Megan N. Houston ◽

Johanna M. Hoch ◽

Matthew C. Hoch

Keyword(s):

Ankle Sprain ◽

Ankle Instability ◽

Data Extraction ◽

Patient Reported Outcome Measures ◽

Chronic Ankle Instability ◽

Healthy Controls ◽

Hand Search ◽

Methodologic Quality ◽

Patient Reported ◽

Healthy Control

Context A comprehensive systematic literature review of the health-related quality-of-life (HRQOL) differences among individuals with chronic ankle instability (CAI), ankle-sprain copers, and healthy control participants has not been conducted. It could provide a better indication of the self-reported deficits that may be present in individuals with CAI. Objective To systematically summarize the extent to which HRQOL deficits are present in individuals with CAI. Data Sources We searched for articles in the electronic databases of EBSCO Host and PubMed Central using key words chronic, functional, mechanical, coper, instability, sprains, and patient-assessed. We also performed a hand search of reference lists, authors, and patient-reported outcomes (PROs) of the articles screened for inclusion. Study Selection Studies were included if they (1) incorporated a PRO as a participant descriptor or as a study outcome to compare adults with CAI to ankle-sprain copers or healthy controls, (2) were written in English, and (3) were published in peer-reviewed journals. Data Extraction Two authors independently assessed methodologic quality using the modified Downs and Black Index. Articles were filtered into 3 categories based on between-groups comparisons: CAI and copers, CAI and healthy control participants, copers and healthy participants. We calculated Hedges g effect sizes and 95% confidence intervals to examine PRO group differences. Data Synthesis Of the 124 studies assessed for eligibility, 27 were included. A total of 24 articles compared PROs in individuals with CAI and healthy controls, 7 compared individuals with CAI and copers, and 4 compared copers and healthy controls. Quality scores on the modified Downs and Black Index ranged from 52.9% to 88.2%, with 8 high-, 16 moderate-, and 3 low-quality studies. Overall, we observed moderate to strong evidence that individuals with CAI displayed deficits on generic and region-specific PROs compared with copers and healthy controls. However, evidence that differences exist between copers and healthy controls was conflicting. In addition, for dimension-specific outcomes, evidence to suggest that fear of reinjury is heightened in individuals with CAI was limited. Conclusions The evidence suggested that CAI is associated with functional and HRQOL deficits, particularly when examined with region-specific PROs. However, PROs do not appear to differ between copers and healthy controls.

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Deactivation of the dorsal anterior cingulate cortex indicated low postoperative sports levels in presurgical patients with chronic ankle instability

BMC Sports Science Medicine and Rehabilitation ◽

10.1186/s13102-021-00353-6 ◽

2021 ◽

Vol 13 (1) ◽

Author(s):

Xiao’ao Xue ◽

Shengkun Li ◽

Hongyun Li ◽

Qianru Li ◽

Yinghui Hua

Keyword(s):

Anterior Cingulate Cortex ◽

Clinical Outcomes ◽

Rating Scale ◽

Ankle Instability ◽

Cingulate Cortex ◽

Chronic Ankle Instability ◽

Anterior Cingulate ◽

Healthy Controls ◽

Dorsal Anterior Cingulate Cortex ◽

Appraisal Processes

Abstract Background Injury-related fear contributed to disability in chronic ankle instability (CAI), while there still lacked exploration on the appraisal processes of the injury-related stimuli. This study aimed to compare the neural activities of the appraisal processes of sprain-related stimuli between presurgical chronic ankle instability patients and healthy controls through functional magnetic resonance imaging (fMRI) and evaluate its relationships with the clinical outcomes of orthopedic surgeries. Methods Eighteen presurgical CAI patients and fourteen healthy controls were recruited and underwent an fMRI session with visual stimulation of movies that showing typical ankle sprains accidents or control videos and the corresponding fear ratings. The clinical outcomes were collected at baseline and a minimum of 2 years after surgery; these included the American Orthopaedic Foot and Ankle Society (AOFAS) scores, the Numeric Rating Scale (NRS) scores, and the Tegner Activity Rating Scale scores. The two-sample t-test would be applied to identify which brain regions were influenced by CAI, and the correlation analysis would be applied to measure the relationship between the activation and clinical outcomes. Results Dorsal anterior cingulate cortex (dACC) was deactivated in CAI patients when compared with healthy controls, and the dACC deactivation strength revealed a moderate correlation with the values of fear ratings for all participants. The deactivation strength was negatively correlated with AOFAS at baseline, with Tegner at follow-up and its improvement. Conclusions Presurgical CAI patients presented deactivated dACC as a different neural activity of appraisal processes of sprain-related stimuli when compared with healthy controls, which was associated with lower postoperative sports levels. More comprehensive patients care including psychological interventions were needed in the clinical management of chronic ankle instability.

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

Foot & Ankle International ◽

10.1177/1071100717701231 ◽

2017 ◽

Vol 38 (7) ◽

pp. 769-778 ◽

Cited By ~ 13

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

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Diminished Plantar Cutaneous Sensation in Patients With Chronic Ankle Instability: A Critically Appraised Topic

International Journal of Athletic Therapy & Training ◽

10.1123/ijatt.2019-0003 ◽

2020 ◽

Vol 25 (3) ◽

pp. 117-120

Author(s):

Christina Jones ◽

Kyle B. Kosik ◽

Phillip Gribble ◽

Matthew C. Hoch

Keyword(s):

Ankle Sprain ◽

Ankle Instability ◽

Chronic Ankle Instability ◽

Healthy Controls ◽

Clinical Question ◽

Bottom Line ◽

Cutaneous Sensation ◽

History Of

Clinical Question: Do individuals with chronic ankle instability have diminished plantar cutaneous sensation compared to ankle sprain copers or individuals with no history of ankle sprain? Clinical Bottom Line: Patients with chronic ankle instability have diminished plantar cutaneous sensation compared to healthy controls with no history of ankle sprain and ankle sprain copers.

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