旋轉側彎腰之二維與三維動作分析比較：初步結果報告

Two-vs. Three-Dimensional Method for Kinematic Analysis of Twist-bending Movement: A Preliminary Report

陳昭瑩(Chao-Ying Chen) ； 陳麗秋(Li-Chiou Chen) ； 鄭素芳(Suh-Fang Jeng) ； 洪珍瑜(Jane-Yu Hong) ； 鄭昶延(Chang-Yan Jeng)

《中華民國物理治療學會雜誌》 24卷1期 (1999/01) Pp. 31-39

https://doi.org/10.29616/JPTAROC.199901.0005

摘要

The purpose of this study was to compare a two-vs. three-dimensional method for the kinematics analysis of twist-bending movement. The subjects were four healthy young men. Reflective markers were placed at the following bony landmarks: the occiput, C7, T12, L5 and S2 to define the cervical, thoracic, lumbar, and sacral angles. The instrument consisted of three synchronized video cameras for two- and three-dimensional analysis. Videotapes were digitized and analyzed using the Peak Performance Motion Analysis System. The twist-bending movement was divided into two phases, i.e. from sitting erect to contacting an object that was positioned at the front-left side of the subject, and from contacting the object to the sitting position. The paired ttest and Pearson correlation coefficient were used to compare the temporal and angular data obtained from the two- and three-dimensional methods. The results showed non-significant differences between the two methods in determining the onset and commencement of the movement phases (p＞0.05). Correlation of joint angles between the two methods was good to excellent for the cervical, thoracic, and lumbar joints(r=0.75 to 0.98, p＜0.0001), and poor to moderate for the sacral joint(r=0.37 and 0.44, p＜0.0001). The difference in range between the two methods was 2° to 6° (7.2% to 41.3% of the total range), except for the thorax which was 18° (42.4% of the total range). Our findings indicate that the two- and three-dimensional methods provide equivalent information on the temporal but not the angular data for the analysis of twist-bending movement.

關鍵字

運動學 ； 效度 ； 動作分析 ； 脊椎

並列摘要

The purpose of this study was to compare a two-vs. three-dimensional method for the kinematics analysis of twist-bending movement. The subjects were four healthy young men. Reflective markers were placed at the following bony landmarks: the occiput, C7, T12, L5 and S2 to define the cervical, thoracic, lumbar, and sacral angles. The instrument consisted of three synchronized video cameras for two- and three-dimensional analysis. Videotapes were digitized and analyzed using the Peak Performance Motion Analysis System. The twist-bending movement was divided into two phases, i.e. from sitting erect to contacting an object that was positioned at the front-left side of the subject, and from contacting the object to the sitting position. The paired ttest and Pearson correlation coefficient were used to compare the temporal and angular data obtained from the two- and three-dimensional methods. The results showed non-significant differences between the two methods in determining the onset and commencement of the movement phases (p＞0.05). Correlation of joint angles between the two methods was good to excellent for the cervical, thoracic, and lumbar joints(r=0.75 to 0.98, p＜0.0001), and poor to moderate for the sacral joint(r=0.37 and 0.44, p＜0.0001). The difference in range between the two methods was 2° to 6° (7.2% to 41.3% of the total range), except for the thorax which was 18° (42.4% of the total range). Our findings indicate that the two- and three-dimensional methods provide equivalent information on the temporal but not the angular data for the analysis of twist-bending movement.

並列關鍵字

Kinematics ； Validity ； Motion analysis ； Spine