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Special Graduate Schools
Graduate School of Science and Technology
Department of Industrial Engineering
3. Theses(Master)
Comparison of indices used for quantifying the total EMG of shoulder muscles
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.author | WANG HUI | - |
| dc.date.accessioned | 2018-11-08T06:27:12Z | - |
| dc.date.available | 2018-11-08T06:27:12Z | - |
| dc.date.issued | 2012-08 | - |
| dc.identifier.other | 12697 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/2991 | - |
| dc.description | 학위논문(석사)아주대학교 일반대학원 :산업공학과,2012. 8 | - |
| dc.description.tableofcontents | Table of Contents Chapter 1 Introduction 1 Chapter 2 Review of Literature 5 2.1. Total EMG index 5 2.1.1. Average and summation EMG index 5 2.1.2. Magnitude method 9 2.1.3. Weighted method 11 2.2. Relationship between EMG activity and physiological responses 13 2.2.1. Heart rate 13 2.2.2. Oxygen uptake 14 2.3. Evaluation of one-handed handling tasks 17 Chapter 3 Methods 22 3.1. Participants 22 3.2. Equipment 23 3.2.1. Heart rate and oxygen uptake 23 3.2.2. Surface EMG 23 3.3. Procedure 24 3.3.1. Participant preparation 24 3.3.2. Experiment data collection procedures 26 3.4. Data analysis 28 3.5. Statistics 32 3.5.1. ANOVA analysis 32 3.5.2. Friedman ANOVA analysis 33 Chapter 4 Results 34 4.1. EMG indics 34 4.1.1. Summation EMG index 34 4.1.2. Magnitude method 47 4.1.3. Weighted method 60 4.1.4. Slopes of the relationship between EMG indices and independent variables 73 4.2. Main effects of EMG index, physiological response, direction, weight, frequency, and distance on correlation coefficients 74 4.3. Interaction effects of EMG index, physiological response, direction, weight, frequency, and distance on correlation coefficients 93 Chapter 5 Discussion 103 5.1. Effects of EMG index, physiological response, direction, weight, frequency and distance 103 5.2. Sensitivity of 3 EMG indices 110 5.3. Study limitations and future study 112 Chapter 6 Conclusions 114 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | Comparison of indices used for quantifying the total EMG of shoulder muscles | - |
| dc.title.alternative | 왕휘 | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.alternativeName | 왕휘 | - |
| dc.contributor.department | 일반대학원 산업공학과 | - |
| dc.date.awarded | 2012. 8 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 570471 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000012697 | - |
| dc.subject.keyword | One-handed handling | - |
| dc.subject.keyword | Electromyography | - |
| dc.subject.keyword | Total muscular strain | - |
| dc.subject.keyword | Total EMG index | - |
| dc.description.alternativeAbstract | Electromyography (EMG) is used to measure the electrical activity of specific muscles in assessment of physical workload. Generally, the activity levels of muscles were presented individually; however, in order to provide a global indicator of stress and strain of workload, it need to use a kind of index to account the "total" muscular load of overall muscles. This study implied three typical indices: (1) summation EMG index, (3) magnitude EMG index and (3) weighted EMG index in the evaluation of total muscular effort of shoulder. Ten male participants were asked perform one-handed handling tasks under 162 experimental conditions. EMG of ten superficial shoulder muscles were collected and combined by three indices. Heart rate and oxygen uptake were measured simultaneously. The relationship between EMG activity and physiological response was studied, and the effects of EMG index, physiological response, direction (upward, downward, rightward, leftward, forward, backward), weight (1, 4, and 7 kg), frequency (2, 6, and 10 cycle/min), as well as distance (20, 40, and 60 cm) on correlation coefficient were analyzed. The results showed that weight had effect on correlation coefficient, where heavier weight resulted in higher correlation coefficient. Frequency also could influence correlation coefficient. Larger frequency was associated with greater muscular demand, physiological responses. 3 kinds of total EMG index studied in the present study were able to differentiate various one-handed handling tasks. The weighted EMG index which revealed a little higher correlation coefficient is recommended. The results of this study was able to provide a method to compare the sensitivity when quantifying the muscle activity of overall muscles, and to give important recommendations for evaluating total effort of shoulder in manual material handling tasks. | - |
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