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Showing 3 results for Postural Control
Maryam Panah-Abadi, Dr Azar Aghayari, Fatemeh Salari Esker, Dr Mehrdad Anbarian,
Volume 18, Issue 2 (6-2013)
Abstract
ABSTRACT
Background and Aim: Despite the fact that balances has often been considered as a measure of lower extremity function, the effect of lower extremity malalignment on balance performance has received little attention. The aim of the present study was to examine postural control following a sudden external perturbation in adolescent girls with genu varum of the knees in comparison to age matched healthy controls.
Materials and methods: This comparative and interventional study included eight adolescent girls with genu varum (age: 13. 5± 1.4 years) and eight age-matched healthy controls (age: 13.8 ± 1.3). The subjects underwent unexpected forward, backward and medio-lateral perturbations triggered by a weight equivalent to 10% of the body weight, of every subject while standing on a foot pressure system mounted on a movable plate. The displacement of the center of pressure (COP) of the feet was measured. Independent t-test was used for statistical analysis. p≤0.05 was considered significant.
Results: Subjects with genu varum of the knees showed a significantly greater COP displacement after perturbation in comparison to the control group (p=0.039).
Conclusion: Our findings revealed that postural control following balance perturbations is weaker in subjects with genu varum deformity than in control group. Consequently, abnormal lower limb alignment is a risk factor which can influence postural control in response to a balance perturbation.
Conflict of Interest: Nil
Received: Jan 17, 2012 Accepted: Dec 20, 2012
Ahya Darvish Sefat, Dr Alireza Rahimi, Dr Amir Sarshin,
Volume 21, Issue 1 (4-2016)
Abstract
Background and Aim: Changes in the normal posture of different parts of the spine can negatively influence the balance control. Because of deformities such as scoliosis, lordosis and kyphosis in spine alignment, line of gravity does not pass from predetermined points, and the body will oscillate. The purpose of the current study was to compare the postural control ability in 10-12 years old boys with spinal sagittal plane deformities.
Material and Methods: In this descriptive-analytical study, after the primary screening and spine kyphosis and lordosis measurement in 417 students, a sample of students with deformity (n=88, mean age: 11.257 years, mean weight: 49.147 kg, and mean height: 155.58 cm) were randomly selected and equally distributed in 4 groups of hyperkyphosis, hypokyphosis, hyperlordosis and hypolordosis. Amount of spine curvatures were measured by flexicurve, and static and dynamic balance were measured by single leg balance test and star excursion balance tests respectively. Using SPSS version 16, data analysis was performed by ANOVA and Bonferronii tests.
Results: Results showed lower static and dynamic postural control in hyperkyphosis group compared to hypokyphosis and hyperlordosis groups. Also, we found a significantly higher static and dynamic postural control in hyperkyphosis group in comparison to hypolordosis group, but there was no significant difference between hyperlordosis and hypolordosis groups (P>0.05).
Conclusion: Based on the results of this study, the effect of hyperkyphosis was more than that of hyperlordosis. But the effect of hypokyphosis on postural control was less, compared to hypolordosis.
Keywords: Postural control, Deformity, Sagittal plane, Kyphosis, Lordosis
Received: Oct 26, 2015 Accepted: Jan 10, 2016
Tahereh Mobarra, Dr Shahla Hojjat, Dr Alireza Rahimi,
Volume 21, Issue 4 (10-2016)
Abstract
Background and Aim: The aim of this study was to compare knee functional ability and static and dynamic postural control in healthy female handball players and female handball players with patellofemoral pain.
Materials and Methods: This non-experimental and case-control study included 25 female handball players with PFP syndrome and 25 healthy female handball players. WOMAC scale and universal goniometer were used for assessment of knee function and range of motion of the knee joint. We used Sharpend Romberg and SEBT tests for measurement of static and dynamic postural control. Using SPSS version 21, data were analyzed by kolmogorov-Smirnov and independent t –tests. p ≤ 0.05 was considered significant.
Results: Knee function was significantly weaker in the patients with PFP than the healthy control group (P=0.001). In PFP group, flexion range of motion was significantly more (P=0.002) and extension range of motion (P=0.005), static postural control (P=0.001) and dynamic postural control in posterior (P=0.002), posterolateral (P=0.001), lateral (P=0.001) and anterolateral (P=0.006) directions were significantly less than those in the healthy subjects. But, there were no significant differences between the two groups in relation to dynamic postural control in anterior, anteromedial, medial and posteromedial directions (P>0.05).
Conclusion: Negative changes in knee functional ability and static postural control and dynamic postural control in lateral and posterior directions in the women with PFP, can be attributed to weakness and atrophy of the knee anteromedial muscles or stiffness of the knee posterolateral muscles. Hence, in rehabilitation of PFP patients, the strengthening of the anteromedial muscles and stretching of the posterolateral muscles of the knee should be considered essential.
Keywords: Female handball players, PFP syndrome, Functional ability, Static and dynamic postural control.
Received: Jan 2, 2016 Accepted: May 9, 2016
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