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題 名 | A Method for the Measurement of the Three-dimensional Kinematics of the Ankle-Foot Complex with Footwear During Activities=著鞋活動時踝足部三維運動之量測方法 |
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作 者 | 郭美英; 許弘昌; 張玲瑛; 李根嘉; 呂東武; | 書刊名 | 中國醫藥科學雜誌 |
卷 期 | 3:1 2002.03[民91.03] |
頁 次 | 頁43-51 |
分類號 | 410.1644 |
關鍵詞 | 外翻足; 功能性鞋墊; 足部運動學; 力學; 步態; Pronated foot; Orthotics; Gait; Kinematics; Level walking; Stair ascending and stair descending; |
語 文 | 英文(English) |
中文摘要 | 使用功能性鞋墊修正足部外翻角度是否能協助病人改善功能性活動時 各關節受力情形,以及是否可減輕可能相關的臨床症狀,是近年來臨床和學術研 究的重要課題。透過運動學的分析,能瞭解功能性鞋墊對功能性活動是否改善。 足部三維運動學量測之精確性決定於標記系統和三維量測技術。從過去研究得知 目前三種標記系統,骨針,鞋和皮膚標記系統之三維量測技術,在足部著鞋的動 態活動有很大的限制。因此,改善現有的標記系統和三維量測技術有其急迫性和 重要性。本研究旨在(一)發展新標記系統,以利著鞋時精確地測量足部三維動態 活動。(二)發展一個新三維下肢數學模型,以結合新標記系統計算足部運動學之 相關變數。 (三)比較傳統與新式量測技術的差別。本研究選取五位年輕扁平足 受試者。足部運動學的變化由三維攝影動作分析系統記錄之(Vicon 370, Oxford Metrics, UK)。受試者須完成走路,上下階梯各六趟。比較二方法之初步結果顯 示平均均方根有1.5-10.2度差異,最大均方根值有6.8-11.71度差異,其對應 時期出現在大約16-82%的動作週期。本篇結果顯示使用方法一和二,在脛跟三 維運動學上有顯著差異,並且建議新量測方法可以代替骨針標記量測技術在著鞋 狀態量測跟骨的運動。 |
英文摘要 | Researchers studying the ankle-foot complex during activities with footwear using markers on the shoes have noted errors in the calculated kinematics. This is a significant limitation for the study of patients with in-shoe foot orthotics. In the present study, a novel method using a newly designed calcaneal device was developed to measure the "true" motion of the ankle-foot complex with footwear during dynamic activities. Its application for pronated-foot patients treated with soft foot orthotics was studied. Five subjects with pronated feet participated in the study. Each foot of the subjects was fitted with a calcaneal device. The subjects performed activities of level walking, stair-ascending and stair-descending with or without soft foot orthotics while the trajectories of the markers on the device and the shoes were measured using a seven-camera motion analysis system (Vicon 370, Oxford Metrics, UK). Six successful trials for each condition were collected. The motion of the ankle-foot complex was calculated separately using the traditional method with the markers on the shank and shoes (Method I) and using the new method with shank markers and those on the calcaneal device (Method II). The maximum root mean squared (RMS) differences between Methods I and II ranged from 6.8°, 4.8° and 8.7° to 11.2°, 10.3° and 11.7°, respectively. Method I produced larger marker array deformation and artifact joint dislocation than Method II did. The RMS differences between the two methods for dorsiflexion/plantarflexion, adduction/abduction and internal/external rotation angles were between 1.5° and 10.2° during the functional activities. Significant differences of the calculated foot kinematics were found between the activities with and without orthotics. There were significant differences between Methods I and II in the calculated tibiocalcaneal kinematics either with or without orthotics. These differences suggest that the new method provides better descriptions of the motion of the ankle-foot complex in subjects with footwear. The new method will be useful for the study of the effectiveness of foot orthotics in subjects with pronated feet. |
本系統中英文摘要資訊取自各篇刊載內容。