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Chiung Ling Chen - One of the best experts on this subject based on the ideXlab platform.
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the feasibility of a video based Motion Analysis System in measuring the segmental movements between upper and lower cervical spine
Gait & Posture, 2007Co-Authors: Howard Hawchang Lan, Lichieh Kuo, Sen Wei Tsai, Chiung Ling ChenAbstract:Abstract The evaluation of the range of Motion (ROM) and static posture in the cervical spine are important in physical examination. Despite offering dynamic assessment without radiation, the video-based Motion Analysis System has not yet been applied to measure the cervical segmental movements. The purposes of this study were to develop a neck model to differentiate the movements and posture between upper and lower cervical spine, and to examine the reliability of measuring cervical Motion with surface markers and the aid of videofluoroscopy. Sixteen healthy adult subjects (eight males and eight females) participated in this study. Ten surface markers were used to estimate the discrepancies in cervical vertebral angles compared with corresponding bony landmarks throughout the ROM. The average intraclass correlation coefficients (ICCs) of the paired vertebral angles between surface markers and bony landmarks ranged from 0.844 to 0.975 and the mean absolute difference (MAD) averaged 2.96°. Our results indicate high consistency between surface markers and bony landmarks throughout the cervical movements. The mean upper (C0–C2) and lower (C2–C7) cervical joint angles in the neutral position were 18.59 ± 4.33° and 23.98 ± 6.15°, respectively. Furthermore, the reliability of the digitizing procedure within raters (ICC = 0.850–0.999; MAD = 0.58–2.42°) and between raters (ICC = 0.759–0.988; MAD = 0.59–2.66°) suggests that the neck Motion Analysis model is a feasible method for investigating static neck posture or dynamic Motion between upper and lower cervical spine.
Lichieh Kuo - One of the best experts on this subject based on the ideXlab platform.
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the feasibility of a video based Motion Analysis System in measuring the segmental movements between upper and lower cervical spine
Gait & Posture, 2007Co-Authors: Howard Hawchang Lan, Lichieh Kuo, Sen Wei Tsai, Chiung Ling ChenAbstract:Abstract The evaluation of the range of Motion (ROM) and static posture in the cervical spine are important in physical examination. Despite offering dynamic assessment without radiation, the video-based Motion Analysis System has not yet been applied to measure the cervical segmental movements. The purposes of this study were to develop a neck model to differentiate the movements and posture between upper and lower cervical spine, and to examine the reliability of measuring cervical Motion with surface markers and the aid of videofluoroscopy. Sixteen healthy adult subjects (eight males and eight females) participated in this study. Ten surface markers were used to estimate the discrepancies in cervical vertebral angles compared with corresponding bony landmarks throughout the ROM. The average intraclass correlation coefficients (ICCs) of the paired vertebral angles between surface markers and bony landmarks ranged from 0.844 to 0.975 and the mean absolute difference (MAD) averaged 2.96°. Our results indicate high consistency between surface markers and bony landmarks throughout the cervical movements. The mean upper (C0–C2) and lower (C2–C7) cervical joint angles in the neutral position were 18.59 ± 4.33° and 23.98 ± 6.15°, respectively. Furthermore, the reliability of the digitizing procedure within raters (ICC = 0.850–0.999; MAD = 0.58–2.42°) and between raters (ICC = 0.759–0.988; MAD = 0.59–2.66°) suggests that the neck Motion Analysis model is a feasible method for investigating static neck posture or dynamic Motion between upper and lower cervical spine.
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feasibility of using a video based Motion Analysis System for measuring thumb kinematics
Journal of Biomechanics, 2002Co-Authors: Lichieh Kuo, Hawyen ChiuAbstract:Abstract While several different methods have been used to measure hand kinematics, fluoroscopy is generally considered to be the most accurate. Recently, video-based Motion Analysis has been developed for the measurement of joint kinematics. This method is versatile, easy to use, and can measure Motions dynamically. Surface markers are most commonly used in the video-based Motion Systems. However, whether the surface markers placed on the thumb accurately represent the true kinematics of the underlying bony segment is questionable. In this study, the feasibility of surface markers to represent thumb kinematics was investigated by fluoroscopy. Both the positions of surface markers and bony landmarks were simultaneous recorded and then digitized. The Ra 2 values comparing the angular changes of the thumb interphalangeal, metacarpal and carpometacarpal joints derived using the surface markers or bony landmarks were 0.9986, 0.9730 and 0.9186 in the flexion/extension plane respectively, 0.8837, 0.9697 and 0.8775 in the abduction/adduction plane; and 0.9884, 0.9643 and 0.9431 in the opposition plane. The ranges, mean and standard deviation of the absolute differences between calculated angles of different marker sets were also compared. These data revealed that the similarities of the two different marker techniques throughout the Motion cycle were high. The differences between the two methods were also within clinically allowable range of ±5°. It is concluded that the application of the video-based Motion Analysis System with surface markers to thumb kinematics is warranted.
Jacqueline Oldham - One of the best experts on this subject based on the ideXlab platform.
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cervical spine rom measurements optimizing the testing protocol by using a 3d ultrasound based Motion Analysis System
Cephalalgia, 2005Co-Authors: Nikolaos Strimpakos, Vasiliki Sakellari, Georgios Gioftsos, Matilda Papathanasiou, Elias Brountzos, Dimitris Kelekis, Eleni Kapreli, Jacqueline OldhamAbstract:The aim of this study was to evaluate the intra- and inter-examiner reliability and validity of neck range of Motion (ROM) measurements. Thirty-five healthy subjects were assessed in all neck movements from two initial positions, sitting and standing, actively (open and closed eyes) and passively by using a 3D ultrasound-based Motion Analysis device (Zebris). Three tests were employed to assess intra-examiner reliability and two examiners used for the inter-examiner reliability. X-rays in neck flexion and extension were used to validate the Zebris System. The standing position yielded higher intraclass correlation coefficient (ICC) values (>0.86) with less error [smallest detectable difference (SDD) 0.79, SDD<14%). Passive assessment of neck ROM presented better reproducibility than active assessment with open or closed eyes in both positions. The inter-examiner reliability was moderate (ICC=0.43-0.68). The correlation between the Zebris System and X-rays was high in both flexion and extension movements. The results showed that the most reliable protocol for assessment of neck ROM is a passive measurement in the standing position. The measurements were well validiated against X-rays and the experience of the investigators must be considered before any comparison among studies is employed.
Sen Wei Tsai - One of the best experts on this subject based on the ideXlab platform.
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the feasibility of a video based Motion Analysis System in measuring the segmental movements between upper and lower cervical spine
Gait & Posture, 2007Co-Authors: Howard Hawchang Lan, Lichieh Kuo, Sen Wei Tsai, Chiung Ling ChenAbstract:Abstract The evaluation of the range of Motion (ROM) and static posture in the cervical spine are important in physical examination. Despite offering dynamic assessment without radiation, the video-based Motion Analysis System has not yet been applied to measure the cervical segmental movements. The purposes of this study were to develop a neck model to differentiate the movements and posture between upper and lower cervical spine, and to examine the reliability of measuring cervical Motion with surface markers and the aid of videofluoroscopy. Sixteen healthy adult subjects (eight males and eight females) participated in this study. Ten surface markers were used to estimate the discrepancies in cervical vertebral angles compared with corresponding bony landmarks throughout the ROM. The average intraclass correlation coefficients (ICCs) of the paired vertebral angles between surface markers and bony landmarks ranged from 0.844 to 0.975 and the mean absolute difference (MAD) averaged 2.96°. Our results indicate high consistency between surface markers and bony landmarks throughout the cervical movements. The mean upper (C0–C2) and lower (C2–C7) cervical joint angles in the neutral position were 18.59 ± 4.33° and 23.98 ± 6.15°, respectively. Furthermore, the reliability of the digitizing procedure within raters (ICC = 0.850–0.999; MAD = 0.58–2.42°) and between raters (ICC = 0.759–0.988; MAD = 0.59–2.66°) suggests that the neck Motion Analysis model is a feasible method for investigating static neck posture or dynamic Motion between upper and lower cervical spine.
Hawyen Chiu - One of the best experts on this subject based on the ideXlab platform.
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feasibility of using a video based Motion Analysis System for measuring thumb kinematics
Journal of Biomechanics, 2002Co-Authors: Lichieh Kuo, Hawyen ChiuAbstract:Abstract While several different methods have been used to measure hand kinematics, fluoroscopy is generally considered to be the most accurate. Recently, video-based Motion Analysis has been developed for the measurement of joint kinematics. This method is versatile, easy to use, and can measure Motions dynamically. Surface markers are most commonly used in the video-based Motion Systems. However, whether the surface markers placed on the thumb accurately represent the true kinematics of the underlying bony segment is questionable. In this study, the feasibility of surface markers to represent thumb kinematics was investigated by fluoroscopy. Both the positions of surface markers and bony landmarks were simultaneous recorded and then digitized. The Ra 2 values comparing the angular changes of the thumb interphalangeal, metacarpal and carpometacarpal joints derived using the surface markers or bony landmarks were 0.9986, 0.9730 and 0.9186 in the flexion/extension plane respectively, 0.8837, 0.9697 and 0.8775 in the abduction/adduction plane; and 0.9884, 0.9643 and 0.9431 in the opposition plane. The ranges, mean and standard deviation of the absolute differences between calculated angles of different marker sets were also compared. These data revealed that the similarities of the two different marker techniques throughout the Motion cycle were high. The differences between the two methods were also within clinically allowable range of ±5°. It is concluded that the application of the video-based Motion Analysis System with surface markers to thumb kinematics is warranted.