scholarly journals Ankle Related Musculotendinous Stiffness in Individuals With and Without Chronic Ankle Instability

2019 ◽  
Vol 51 (Supplement) ◽  
pp. 506
Author(s):  
Kyeongtak Song ◽  
Troy Blackburn ◽  
Erik A. Wikstrom
Keyword(s):  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Musculotendinous Stiffness

The Immediate Effects of Ankle Joint Mobilization on Ankle Musculotendinous Stiffness in Individuals With Chronic Ankle Instability

2020 ◽  
pp. 1-5
Author(s):  
M. Spencer Cain ◽  
Kyeongtak Song ◽  
J. Troy Blackburn ◽  
Kimmery Migel ◽  
Erik A. Wikstrom
Keyword(s):  
Ankle Joint ◽  
Ankle Instability ◽  
Change Score ◽  
Chronic Ankle Instability ◽  
Minimal Detectable Change ◽  
Plantar Flexor ◽  
Joint Mobilization ◽  
Before And After ◽  
Damped Oscillation ◽  
Musculotendinous Stiffness

Ankle joint mobilization has been shown to be effective at improving outcomes in those with chronic ankle instability (CAI), but the neuromuscular mechanisms are still unknown. We aimed to determine the immediate effect of a single Grade III anterior-to-posterior ankle joint mobilization bout on ankle musculotendinous stiffness (MTS) in those with CAI. Seventeen CAI participants had plantar flexor and fibularis MTS assessed before and after a 5-min joint mobilization treatment. MTS outcomes were estimated using the damped oscillation method. Fibularis (0.25 ± 0.41 N/m/kg, p = .028) but not plantar flexor MTS (−2.18 ± 14.35 N/m/kg, p = .539) changed following mobilization and exceeded the calculated minimal detectable change score (0.12 N/m/kg). Increased fibularis MTS may represent a neuromuscular mechanism by which ankle joint mobilizations improve postural control in those with CAI.

Association between corticospinal inhibition and active dorsiflexion range of motion in patients with chronic ankle instability

2021 ◽  
Author(s):  
Kyle B. Kosik ◽  
Masafumi Terada ◽  
Ryan S. McCann ◽  
Colin P. Drinkard ◽  
Phillip A. Gribble
Keyword(s):  
Range Of Motion ◽  
Ankle Instability ◽  
Chronic Ankle Instability

scholarly journals Arthroscopic Internal Brace Augmentation With Arthroscopic Modified Broström Operation for Chronic Ankle Instability

2021 ◽  
Author(s):  
Akinobu Nishimura ◽  
Shigeto Nakazora ◽  
Yoshiyuki Senga ◽  
Yukie Kitaura ◽  
Aki Fukuda ◽  
...  
Keyword(s):  
Ankle Instability ◽  
Chronic Ankle Instability ◽  
Internal Brace

Quantitative Analysis of Deltoid Ligament Degradation in Patients With Chronic Ankle Instability Using Computed Tomographic Images

2021 ◽  
pp. 107110072199707
Author(s):  
Yasunari Ikuta ◽  
Tomoyuki Nakasa ◽  
Junichi Sumii ◽  
Akinori Nekomoto ◽  
Nobuo Adachi
Keyword(s):  
Ankle Instability ◽  
Ct Images ◽  
Chronic Ankle Instability ◽  
Control Group ◽  
Deltoid Ligament ◽  
Anterior Talofibular Ligament ◽  
Mri Findings ◽  
Calcaneofibular Ligament ◽  
Level Of Evidence ◽  
Strong Negative Correlation

Background: Rotational ankle instability (RAI) is associated with the faster onset of severe ankle osteoarthritis via dysfunction of the anterior talofibular ligament, calcaneofibular ligament, and deltoid ligament. No specific clinical examination is available for RAI, and diagnostic imaging has limitations in evaluating ligament degradation. This study investigated the deltoid ligament degeneration using Hounsfield unit (HU) values on computed tomography (CT) images. Methods: Patients were enrolled in this retrospective analysis if they had undergone magnetic resonance imaging (MRI) and CT scans of the ankle. The chronic ankle instability (CAI) group comprised 20 ankles with CAI (9 men, 11 women; mean age, 28.7 years) and the control group comprised 28 ankles (16 men, 12 women, mean age, 41.3 years). The average HU values of the deep posterior tibiotalar ligament (dPTL) that constitutes the deltoid ligament were measured on coronal CT images, and MRI results were used as a reference. All patients were subdivided based on the MRI findings of dPTL injury such as fascicular disruption, irregularity, and the loss of striation. Results: A strong negative correlation was identified between age and HU values for all patients (Spearman ρ = −0.63; P < .001). The mean HU values of the dPTL for participants aged <60 years were 81.0 HU for the control group (21 ankles) and 69.5 HU for the CAI group ( P = .0075). No significant differences in the HU values were observed for the dPTL among the MRI subgroups. Conclusion: In addition to the conventional imaging examination such as stress radiographs and MRI, HU measurements of CT images could be useful for quantitatively and noninvasively evaluating degenerative changes in the deltoid ligament for CAI patients to assist the diagnosis of RAI. Level of Evidence: Level III. case-control study.

scholarly journals Talar and Subtalar T1ρ Relaxation Times in Limbs with and without Chronic Ankle Instability

Cartilage ◽  
2021 ◽  
pp. 194760352199462
Author(s):  
Kyeongtak Song ◽  
Brian Pietrosimone ◽  
Joshua N. Tennant ◽  
Daniel B. Nissman ◽  
Katherine M. Dederer ◽  
...  
Keyword(s):  
Ankle Instability ◽  
Relaxation Times ◽  
Chronic Ankle Instability ◽  
Talar Dome ◽  
Contralateral Limb ◽  
Secondary Purpose ◽  
Healthy Control ◽  
Control Limb ◽  
Proteoglycan Content ◽  
Magnetic Resonance Imaging Mri

Objective The primary aim was to determine differences in talocrural and subtalar joint (STJ) articular cartilage composition, using T1ρ magnetic resonance imaging (MRI) relaxation times, between limbs in individuals with unilateral chronic ankle instability (CAI) and compare with an uninjured control. Our secondary purpose was to determine the association between talocrural and STJ composition in limbs with and without CAI. Design T1ρ MRI relaxation times were collected on 15 CAI (11 females, 21.13 ± 1.81 years, body mass index [BMI] = 23.96 ± 2.74 kg/m2) and 15 uninjured control individuals (11 females, 21.07 ± 2.55 years, BMI = 24.59 ± 3.44 kg/m2). Talocrural cartilage was segmented manually to identify the overall talar dome. The SJT cartilage was segmented manually to identify the anterior, medial, and posterior regions of interest consistent with STJ anatomical articulations. For each segmented area, a T1ρ relaxation time mean and variability value was calculated. Greater T1ρ relaxation times were interpreted as decreased proteoglycan content. Results Individuals with CAI demonstrated a higher involved limb talocrural T1ρ mean and variability relative to their contralateral limb ( P < 0.05) and the healthy control limb ( P < 0.05). The CAI-involved limb also had a higher posterior STJ T1ρ mean relative to the healthy control limb ( P < 0.05). In healthy controls ( P < 0.05), but not the CAI-involved or contralateral limbs (p>0.05), talocrural and posterior STJ composition measures were positively associated. Conclusions Individuals with CAI have lower proteoglycan content in both the talocrural and posterior STJ in their involved limbs relative to the contralateral and a healthy control limb. Cartilage composition findings may be consistent with the early development of posttraumatic osteoarthritis.

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