Publications by authors named "Arik Rehani Musagara"
Background: Goal of this work is a quantitative description of Jacquelin Perry's rocker concept by locating the position of the heel rocker and the forefoot rocker within segments of the foot via functional calibration.
Methods: Two functional calibration tasks with the foot in ground contact were performed by ten typical developed adults and foot marker motion was captured. After applying a least-square method for constructing foot segments, their motion relative to the floor was analyzed via a functional algorithm.
Background: Patients with cerebral palsy and increased femoral anteversion frequently show disturbing internal rotation gait which may be treated via femoral derotation osteotomy (FDO). A recent study monitored that hip rotation in gait may heavily depend on the procedure by which it is being determined. Traditional measures using the femoral epicondyles as reference for the knee axis (CONV) resulted in more severe transverse plane deviations compared to those using a functional method (FUNC) with relevant implications for treatment indication of FDO.
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- Researchers developed a new device called the Hindfoot Alignment Device (HiAD) to improve the accuracy of placing markers on the hindfoot for multi-segment foot models, addressing issues with existing landmarks.
- The study involved testing the HiAD on ten subjects, and results showed a significant reduction (70%) in measurement errors compared to previous methods, with variability in marker placement being minimal.
- The HiAD demonstrated good to excellent reliability for measuring the medial arch, suggesting it can be widely adopted in foot model assessments, though further research is needed to evaluate its effectiveness in detecting hindfoot deformities.
Background: The determination of the knee joint axis (KJA) via specific calibration movements has become a promising alternative to the conventional approach to determine this axis based on regression equations or directly via marker placement on bony landmarks of the knee. Since the orientation of the KJA may differ between methods, it has direct influence on hip rotation and may therefore influence clinical decision making in context of transverse plane gait deviations.
Research Question: Does a functional KJA calibration lead to clinically relevant differences in hip rotation estimates during gait compared to the conventional method?
Methods: 95 subjects (age: 19.
Background: Although functional methods determining the hip joint center (HJC) are becoming increasingly popular, no systematic investigation has been conducted yet to assess the reliability of functional hip joint calibration in patients with cerebral palsy (CP).
Research Question: What is the most reliable way to conduct functional calibration motions for estimating HJC location in children with CP and movement disorders?
Methods: Twenty-two patients with CP were included in the study. A marker set for Plug-in Gait with additional cluster markers was used.