A Technique for Quantifying the Relative Angular Movement of the Head and Shoulders
The objective of this study was to develop a method for quantifying the relative angular movements of the head and shoulders. To analyze and quantify the movement of aforementioned body parts, a turns index (TI) and range of motion (ROM) methods were chos
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Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republic 2 Faculty of Military Technology, University of Defence, Brno, Czech Republic 3 2nd Faculty of Medicine, Charles University in Prague, Prague, Czech Republic
Abstract - The objective of this study was to develop a method for quantifying the relative angular movements of the head and shoulders. To analyze and quantify the movement of aforementioned body parts, a turns index (TI) and range of motion (ROM) methods were chosen and used. It should be noted that the TI method hasn't been used before in neurological practice. By using the TI, the physicians are directly informed about the intensity of patient movements. The measurements of both inclination and rotation were done to accuracy of 1˚ by MoCap system containing a combination of camera and gyroscope systems. Then, 2-D plot comparing the head and shoulder rotations and another 2-D plot comparing the head and shoulder inclinations were obtained. Combination of TI and ROM was then used to model the measured data distribution and evaluate the patient's stability of his body posture. The correlation between the TIs and ROMs is negative moderate to negative strong. It is possible to use the new method for rehabilitation and diagnosis purposes. Keywords – head, shoulder, movement, kinematics, turns index.
I. INTRODUCTION
There is a large number of diseases and disorders that affect the skeletal, muscular and nervous systems of human body. Many of them can result in abnormal posture and movement of both neck and shoulders. Thus being able to spot these symptoms is important for many medical areas [1]. Their quantification could help understanding their connection to diseases affecting the vestibular and nervous system functions [2, 3]. That is one of the reasons why there is currently ongoing development of new methods to quantify the relative angular movements of head and shoulders [4, 5], by capturing them on two to three digital cameras positioned to cover all three dimensions. Today’s new motion capture (MoCap) systems replace the orthopedic goniometers for measuring of relative angular positions of the head and shoulders, [6]. However, methods for quantification of kinematics data of the relative movements of the head and shoulders are not yet tested or developed, [7]. This study aims to describe the quantification method of the relative head and shoulder movements into kinematics data for use of neurological practice. The purpose of our © Springer Nature Singapore Pte Ltd. 2018 H. Eskola et al. (eds.), EMBEC & NBC 2017, IFMBE Proceedings 65, DOI: 10.1007/978-981-10-5122-7_78
preliminary study is also testing the newly developed technique. For this reason, the data are collected from healthy subjects and patients. The aim is also to determine whether the proposed parameters lead to identical conclusions and detects a difference between patients and healthy subjects. The methods were designed in such a way to be capable to quantify the relative movements and [4, 8, 9
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