系統識別號 U0026-0812200915313163
論文名稱(中文) 老化對電腦使用者肌肉活動與姿勢控制之影響
論文名稱(英文) The effect of aging on muscle activation and postural control for young and older adults
校院名稱 成功大學
系所名稱(中) 物理治療研究所
系所名稱(英) Department of Physical Therapy
學年度 97
學期 2
出版年 98
研究生(中文) 蕭立苹
研究生(英文) Li-Ping Hsiao
電子信箱 t6696107@mail.ncku.edu.tw
學號 t6696107
學位類別 碩士
語文別 英文
論文頁數 79頁
口試委員 口試委員-黃英修
中文關鍵字 電腦工作  肌肉活動  姿勢  老化 
英文關鍵字 Muscle activation  Computer work  Posture  Age effect 
中文摘要 研究背景與目的:使用電腦已成一項普及的科技,越來越多年長者開始嘗試學習如何使用電腦。然而,年長者有一些老化所造成的生理改變,諸如:肌力下降、不適當的姿勢、動作控制的形式改變及手部功能減退等等。我們推測年長者使用電腦時可能會採取和年輕人不一樣的策略。因此,本篇研究目的乃在探討年長者及年輕人在使用一系列滑鼠作業時肩頸的動力學及運動學資料;此外,也將探討因老化所造成的改變和電腦作業表現之間的相關性。研究方法:本研究分別收取15位五十歲以後才開始學習使用電腦的健康年長者和15位健康年輕人。研究過程中會讓他們操作一系列不同的滑鼠任務,包括:瞄準(aiming)、拖曳(dragging)、選取任務選單(menu)以及滑鼠疲乏測試 (fatigue task)。本研究利用6台紅外線攝影機以及9顆反光球記錄身體的運動學資料。此外,受試者身上將貼有六對肌電圖電極,紀錄受試者在使用電腦過程中肌肉的活動。之後利用Qualysis和Matlab軟體做進一步的資料處理,以計算出肩頸及上肢的關節角度和肌肉活性。統計方式則採用多變量分析重複評量。結果:年長者的肌肉活動較年輕人來的高(P<0.05)。在任務差異上,手腕伸直肌在拖曳任務時有最大的肌肉活動(P<0.0001)。中頻的部分,年長者手部肌肉的中頻較年輕人來的高(P<0.05)。執行完疲乏任務後,年長者跟年輕人在頸部肌肉的中頻參數上有顯著的交互作用,事後分析的結果顯示年長者頸部肌肉的中頻顯著的下降(P<0.01),年輕人則無發現明顯改變。相較於年輕人,年長者有較大的頭頸椎角度(cranial-cervical)及頸部屈曲角度(neck flexion)(P<0.05);相反的,頭部屈曲角度(head flexion)、肩膀角度(shoulder angle)、手肘角度(elbow angle)及手腕角度(wrist ulnar deviation)都是較小的(P<0.05)。執行完疲乏任務,頭頸椎角度、頭部屈曲及手腕角度明顯變大(P<0.05)且肩膀角度及手肘角度則顯著變小(P<0.05)。結論:老化會影響年長者在執行一系列滑鼠任務時的表現。此外,年長者的肌肉活動較年輕人高。年長者的姿勢比較不適當(awkward),尤其在執行完疲乏任務後,其姿勢會變得更差。這些結果顯示,如果年長者長時間持續使用電腦或是使用電腦採取的姿勢不恰當可能會使得他們較容易產生肌肉骨骼系統症狀。
英文摘要 Background and purpose: More and more older adults tried to learn and use computer. However, aging may result in some physiological changes, such as reduced muscle strength, awkward posture, changed motor control pattern and deteriorated hand function. We speculate that elderly might use different way to perform a computer task as compared to young adults owing to these factors. The purpose of this study was to compare the kinetic and kinematic data for neck-shoulder region between young and older adults while using a series of mouse tasks. Furthermore, we investigated the associations between some age-related changes with the performance of computer tasks. Methods: Fifteen healthy young adults and fifteen healthy older adults volunteered for this study. The older adults had to learn computer skills after fifty years old. All participants performed a series of mouse manipulation tasks including: aiming, dragging, menus and fatigue tasks. Motion capture cameras and electromyographic analysis were used to obtain the kinetic and kinematic data on neck-shoulder region during performing a series of mouse manipulation tasks. Analysis of variance with repeated measures on task and time factors was used to analyze joint angle, median frequency (MF), and root mean square (RMS) between two groups. Results: The older adults had higher RMS as compared to the young adults (P<0.05). For task difference, the highest RMS was found for the wrist extensor while performing the dragging task (P<0.0001). The older adults had higher median frequency of right extensor digitorum and right flexor digitorum superficial for all mouse tasks (P<0.05). After completing the fatigue task, a time x group interaction on MF of neck muscles was found (P=0.031). The post hoc revealed that there was a significant downward shift of MF for the older adults (P<0.01) but no significant difference for the young adults. Compared with the young adults, the older adults had greater cranial-cervical angle and neck flexion (all P<0.05); but smaller head flexion, shoulder angle, elbow angle and ulnar deviation (all P<0.05). After completing the fatigue task, the cranial-cervical angle, head flexion, and ulnar deviation increased significantly (P<0.05); but shoulder and elbow angle decreased (P<0.05). Conclusion: Age-related changes affected the performance of this set of the mouse tasks. As compared to the young adults, the muscle activation level was higher for the older adults. The older adults tended to have more awkward posture and easier to reach extreme range after completing fatigue tasks. These results from analysis of the kinetic and kinematic data suggested that the older adults might have greater risk of further developing musculoskeletal disorder if they perform the computer task continuously or inappropriately.
論文目次 Abstract --------------------------------------------------------------------------------------------------------------- I
Chinese abstract ------------------------------------------------------------------------------------------------- III
Acknowledge ------------------------------------------------------------------------------------------------------ V
Table of contents ------------------------------------------------------------------------------------------------ VI
List of tables --------------------------------------------------------------------------------------------------- VIII
List of figures ---------------------------------------------------------------------------------------------------- IX

Introduction ------------------------------------------------------------------------------------------------------- 1
Method 12
Participants -------------------------------------------------------------------------------------------------------- 12
Instrumentation -------------------------------------------------------------------------------------------------- 12
Basic measurement --------------------------------------------------------------------------------------------- 14
Computer task ---------------------------------------------------------------------------------------------------- 15
Statistical analysis ---------------------------------------------------------------------------------------------- 16
Results 17
Electromyographic data -------------------------------------------------------------------------------------- 17
Kinematic data --------------------------------------------------------------------------------------------------- 19
Fatigue task ------------------------------------------------------------------------------------------------------- 22
Performance ------------------------------------------------------------------------------------------------------ 22
Correlation -------------------------------------------------------------------------------------------------------- 23
Symptom scores ------------------------------------------------------------------------------------------------- 23
Discussion --------------------------------------------------------------------------------------------------------- 25
Conclusion -------------------------------------------------------------------------------------------- ----------- 37
References -------------------------------------------------------------------------------------------------------- 38
Appendix ---------------------------------------------------------------------------------------------------------- 76
Author’s background --------------------------------------------------------------------------------------- 79
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