Myoelectric Activity Differences in Three Learning Sessions

2002 ◽  
Vol 16 (2) ◽  
pp. 92-96
Author(s):  
Tiina Ritvanen ◽  
Reijo Koskelo ◽  
Osmo H„nninen
Keyword(s):  
High School Students ◽  
Muscle Activity ◽  
Muscle Tension ◽  
Emg Activity ◽  
Traditional Learning ◽  
Myoelectric Activity ◽  
School Students ◽  
Language Laboratory ◽  
Upper Trapezius ◽  
Muscle Groups

Abstract This study follows muscle activity in three different learning sessions (computer, language laboratory, and normal classroom) while students were studying foreign languages. Myoelectric activity was measured in 21 high school students (10 girls, 11 boys, age range 17-20 years) by surface electromyography (sEMG) from the upper trapezius and frontalis muscles during three 45-min sessions. Root mean square (RMS) average from both investigated muscles was calculated. The EMG activity was highest in both muscle groups in the computer-aided session and lowest in the language laboratory. The girls had higher EMG activity in both investigated muscle groups in all three learning situations. The measured blood pressure was highest at the beginning of the sessions, decreased within 10 min, but increased again toward the end of the sessions. Our results indicate that the use of a computer as a teaching-aid evokes more constant muscle activity than the traditional learning situations. Since muscle tension can have adverse health consequences, more research is needed to determine optimal classroom conditions, especially when technical aids are used in teaching.

Use of a Shoulder Rest for Playing the Violin Revisited: An Analysis of the Effect of Shoulder Rest Height on Muscle Activity, Violin Fixation Force, and Player Comfort

2019 ◽  
Vol 34 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Laura M Kok ◽  
Jim Schrijvers ◽  
Marta Fiocco ◽  
Barend van Royen ◽  
Jaap Harlaar
Keyword(s):  
Muscle Activity ◽  
Anterior Part ◽  
Activity Patterns ◽  
Deltoid Muscle ◽  
Surface Emg ◽  
Emg Activity ◽  
Linear Regression Models ◽  
Upper Trapezius ◽  
Shoulder Muscles ◽  
Rest Condition

AIMS: For violinists, the shoulder rest is an ergonomic adaptation to reduce musculoskeletal load. In this study, we aimed to evaluate how the height of the shoulder rest affects the violin fixation force and electromyographic (EMG) activity of the superficial neck and shoulder muscles. METHODS: In professional violinists, four different shoulder rest heights during five playing conditions were evaluated. Outcome variables included the jaw-shoulder violin fixation force and bilateral surface EMG of the upper trapezius (mTP), sternocleidomastoid (mSCM), and left anterior part of the left deltoid muscle (mDTA). Playing comfort was subjectively rated on a visual analogue scale (VAS). Linear regression models were estimated to investigate the influence of the shoulder rest height on muscle activity and violin fixation force as well as the muscle activity of the five evaluated muscles on violin fixation force. RESULTS: 20 professional violinists (4 males, 16 females, mean age 29.4 yrs) participated in this study. The shoulder rest condition had a significant effect on playing comfort (p<0.001), with higher shoulder rest conditions associated with decreased subjective playing comfort. The mean violin fixation force for each shoulder rest condition ranged between 2.92 and 3.39 N; higher shoulder rests were related to a higher violin fixation force (p<0.001). CONCLUSION: In this study, violin fixation force and muscle activity of the left mDTA increased while playing with an increasing height of the shoulder rest. As the shoulder rest influences muscle activity patterns and violin fixation force, adjustment of the shoulder rest and positioning of the violin need to be carefully optimized.

scholarly journals Relationship Between Sleep, Neck Muscle Activity, and Pain in Cervical Dystonia

1996 ◽  
Vol 23 (4) ◽  
pp. 285-290 ◽  
Author(s):  
Frank Lobbezoo ◽  
Marc Thu Thon ◽  
Guy Rémillard ◽  
Jacques Y. Montplaisir ◽  
Gilles J. Lavigne
Keyword(s):  
Muscle Activity ◽  
Cervical Dystonia ◽  
Nrem Sleep ◽  
Spinal Pain ◽  
Spasmodic Torticollis ◽  
Controlled Study ◽  
Emg Activity ◽  
Neck Muscle ◽  
Upper Trapezius ◽  
Before And After

AbstractObjective: The interactions between sleep, neck muscle activity, and cervical spinal pain were examined in a controlled study with nine patients suffering from idiopathic cervical dystonia (ICD; also referred to as spasmodic torticollis), and nine gender- and age-matched controls. Methods: From each participant, two all-night polysomnograms with additional electromyographic recordings from the sternocleidomastoid and upper trapezius muscles were obtained. The first night was for habituation to the laboratory environment; the second night for experimental data collection. Visual analogue scales were used to collect intensity and unpleasantness ratings of cervical spinal pain before and after the second sleep recording. Results: None of the standard sleep variables showed statistically significant differences between average values of both groups of participants. However, a significantly larger variance in sleep latency was obtained for the ICD patients. In general, abnormal cervical muscle activity decreased immediately when lying down without the intention to go to sleep. Subsequently, abnormal muscle contractions were gradually abolished in all ICD patients during the transition from relaxed wakefulness to light NREM sleep. Following this transition phase, no more abnormal EMG activity was found in any of our patients. Finally, cervical spinal pain intensity and unpleasantness were reduced by about 50% overnight. Conclusions: Both supine position and sleep can be associated with an improvement of symptoms of ICD, and this disorder does not induce any sleep perturbations.

EMG Analysis of Patients with Unilateral Neck Pain

1999 ◽  
Vol 8 (1) ◽  
pp. 32-42 ◽  
Author(s):  
Robert L. Whalen ◽  
Steven P. Konstant ◽  
Teddy W. Worrell ◽  
Sam Kegerreis
Keyword(s):  
Neck Pain ◽  
Muscle Activity ◽  
Physical Therapist ◽  
Surface Emg ◽  
High Variability ◽  
Emg Activity ◽  
Upper Trapezius ◽  
Visual Analog Scales ◽  
Vas Scores ◽  
Emg Electrodes

The purpose of this study was to determine whether differences exist in EMG activity between involved and uninvolved upper trapezius muscles in participants with unilateral neck pain. Thirteen volunteers, seen by a physical therapist, gave informed consent. Surface EMG electrodes were placed on involved and uninvolved upper trapezius muscles. Root mean squared EMG activity was measured. Visual analog scales (VASs) for pain were used for each side. Reliability data indicated high ICC (2,1) but also large SEMs and CVs. EMG activity increased from resting to shrugging to abducting positions. Participants perceived greater pain on the involved side than the uninvolved side. EMG readings for individuals were consistent, however, between participants. EMG had high variability. Although participants' VAS scores were consistent with their reports of unilateral neck pain, surface EMG readings did not support the existence of increased muscle activity on the involved side.

EMG in Common Migraine: Changes in Absolute and Proportional EMG Levels During Real-Life Stress

Cephalalgia ◽  
1988 ◽  
Vol 8 (3) ◽  
pp. 163-174 ◽  
Author(s):  
Plona Goudswaard ◽  
Jan Passchier ◽  
Jacobus F Orlebeke
Keyword(s):  
Muscle Activity ◽  
Life Stress ◽  
Muscle Tension ◽  
Real Life ◽  
Emg Activity ◽  
Experimental Stress ◽  
Facial Muscle ◽  
Long Duration ◽  
The Absolute ◽  
Muscle Responses

The absolute and proportional EMG levels of the frontal, temporal, and corrugator muscles of 37 migraine patients and 37 matched controls were recorded during three experimental sessions: adaptation and real-life and experimental stress, both of long duration. Migraine patients did not show significantly different absolute EMG levels but had higher proportional EMG levels of the corrugator muscle than controls in each session. Migraine patients did not have different facial muscle responses to stress, and the two experimental groups reacted similarly to real-life and experimental stress. No relation was found between muscle activity and reported headache within 24 h after real-life stress. Increased EMG activity due to stress does not seem to be a significant cause of headache in common migraine as defined in this study, but rather a response to pain. Migraine patients with headache during stress showed lower muscle tension than patients without headache.

scholarly journals Guidelines for Working Heights of the Lower-Limb Exoskeleton (CEX) Based on Ergonomic Evaluations

2021 ◽  
Vol 18 (10) ◽  
pp. 5199
Author(s):  
Yong-Ku Kong ◽  
Chae-Won Park ◽  
Min-Uk Cho ◽  
Seoung-Yeon Kim ◽  
Min-Jung Kim ◽  
...  
Keyword(s):  
Lower Limb ◽  
Muscle Activity ◽  
Biceps Brachii ◽  
Erector Spinae ◽  
Whole Body ◽  
Emg Activity ◽  
Triceps Brachii ◽  
Lower Limb Exoskeleton ◽  
Upper Trapezius ◽  
Subjective Discomfort

The aim of this study was to evaluate the muscle activities and subjective discomfort according to the heights of tasks and the lower-limb exoskeleton CEX (Chairless EXoskeleton), which is a chair-type passive exoskeleton. Twenty healthy subjects (thirteen males and seven females) participated in this experiment. The independent variables were wearing of the exoskeleton (w/ CEX, w/o CEX), working height (6 levels: 40, 60, 80, 100, 120, and 140 cm), and muscle type (8 levels: upper trapezius (UT), erector spinae (ES), middle deltoid (MD), triceps brachii (TB), biceps brachii (BB), biceps femoris (BF), rectus femoris (RF), and tibialis anterior (TA)). The dependent variables were EMG activity (% MVC) and subjective discomfort rating. When wearing the CEX, the UT, ES, RF, and TA showed lower muscle activities at low working heights (40–80 cm) than not wearing the CEX, whereas those muscles showed higher muscle activities at high working heights (100–140 cm). Use of the CEX had a positive effect on subjective discomfort rating at lower working heights. Generally, lower discomfort was reported at working heights below 100 cm when using the CEX. At working heights of 100–140 cm, the muscle activity when wearing the CEX tended to be greater than when not wearing it. Thus, considering the results of this study, the use of the lower-limb exoskeleton (CEX) at a working height of 40–100 cm might reduce the muscle activity and discomfort of whole body and decrease the risk of related disorders.

scholarly journals High School Students' Online Learning Ineffectiveness in Experimental Courses During the COVID-19 Pandemic

2021 ◽  
Vol 12 ◽  
Author(s):  
Jon-Chao Hong ◽  
Yue Liu ◽  
Yinsheng Liu ◽  
Li Zhao
Keyword(s):  
High School ◽  
Online Learning ◽  
High School Students ◽  
Online Teaching ◽  
Sudden Change ◽  
Traditional Learning ◽  
School Students ◽  
Online Learners ◽  
Factors Affecting ◽  
Hands On Learning

Due to the COVID-19 pandemic, online learning has been adopted in all stages of education. This sudden change from traditional learning to 100% online learning may affect students' learning effectiveness, especially in experimental courses. However, there has been little discussion of experimental courses conducted entirely through online learning. To address this gap, the present study investigated factors affecting high school students' online learning ineffectiveness (OLI) in online experimental courses, particularly online science experimental courses. The role of gender was also explored to understand whether it affects participants' OLI. An ANOVA was conducted to analyze the data from a survey of 347 online learners in high schools. The results indicated that the number of online experimental courses and the duration of online hands-on learning were negatively related to the high school students' OLI. Meanwhile, the study found that the high school participants' OLI differed by gender, with female students more likely than males to have OLI in the context of online learning. The results of this study can provide a reference for teachers who conduct online experimental courses and wish to improve their online teaching, not only during the COVID-19 lockdown, but also in other pandemic periods.

scholarly journals Walking With a Robotic Exoskeleton Does Not Mimic Natural Gait: A Within-Subjects Study (Preprint)

2018 ◽  
Author(s):  
Chad Swank ◽  
Sharon Wang-Price ◽  
Fan Gao ◽  
Sattam Almutairi
Keyword(s):  
Lower Extremity ◽  
Muscle Activity ◽  
Stance Phase ◽  
Swing Phase ◽  
Healthy Adults ◽  
Emg Activity ◽  
Robotic Exoskeleton ◽  
Gait Parameters ◽  
Muscle Groups ◽  
The Impact

BACKGROUND Robotic exoskeleton devices enable individuals with lower extremity weakness to stand up and walk over ground with full weight-bearing and reciprocal gait. Limited information is available on how a robotic exoskeleton affects gait characteristics. OBJECTIVE The purpose of this study was to examine whether wearing a robotic exoskeleton affects temporospatial parameters, kinematics, and muscle activity during gait. METHODS The study was completed by 15 healthy adults (mean age 26.2 [SD 8.3] years; 6 males, 9 females). Each participant performed walking under 2 conditions: with and without wearing a robotic exoskeleton (EKSO). A 10-camera motion analysis system synchronized with 6 force plates and a surface electromyography (EMG) system captured temporospatial and kinematic gait parameters and lower extremity muscle activity. For each condition, data for 5 walking trials were collected and included for analysis. RESULTS Differences were observed between the 2 conditions in temporospatial gait parameters of speed, stride length, and double-limb support time. When wearing EKSO, hip and ankle range of motion (ROM) were reduced and knee ROM increased during the stance phase. However, during the swing phase, knee and ankle ROM were reduced when wearing the exoskeleton bionic suit. When wearing EKSO, EMG activity decreased bilaterally in the stance phase for all muscle groups of the lower extremities and in the swing phase for the distal muscle groups (tibialis anterior and soleus) as well as the left medial hamstrings. CONCLUSIONS Wearing EKSO altered temporospatial gait parameters, lower extremity kinematics, and muscle activity during gait in healthy adults. EKSO appears to promote a type of gait that is disparate from normal gait in first-time users. More research is needed to determine the impact on gait training with EKSO in people with gait impairments.

scholarly journals Penerapan Project Based Learning untuk Melatih Kemampuan Literasi Tumbuhan Abad 21 pada Siswa SMA

2019 ◽  
Vol 2 (1) ◽  
pp. 19 ◽  
Author(s):  
Febby Rizkamariana ◽  
Sariwulan Diana ◽  
Ana Ratna Wulan
Keyword(s):  
High School ◽  
High School Students ◽  
Sampling Technique ◽  
Project Based Learning ◽  
Traditional Learning ◽  
School Students ◽  
Post Test ◽  
Quasi Experimental ◽  
Equivalent Control ◽  
Almost All

This study aims to analyze the implementation of project based learning (PjBL) in improving high school students’ ability of 21st century botanical literacy. This study used quasi experimental method through non-equivalent control grup design. In the design of this study, there was a pre-test about botanical literacy before the treatment in experiment class and control, then it was done a treatment in experiment class with PjBL model and traditional learning in control class. After that, the students were given post-test about botanical literacy after learning activities. Sample in this study as much as 2 classes that belongs to class ten in one of High School in Cimahi City. The determination of study sample was conducted with purposive sampling technique because in choosing sample considering the condition of the students who have not learned yet about plants classification in school. Botanical literacy that was measured in this research is the ability to think critically to classify plants and solve the problem about plants. The result of the research is average of  N-gain in the experimental class  increased with moderate category, in the average of N-gain in the control class increased in low category. Overall, the activities in the stage of PjBL model has finished well by the teacher and students. Almost all the students agree that PjBL model give chances to the students to apply the knowledge on classifying plants, train on solving problem, and improve the learning motivation.

Organizational and methodical features of classical aerobics and rhythmic gymnastics

2021 ◽  
pp. 82-88
Author(s):  
Marianna V. Kuzmenko ◽  
Vera B. Boldyreva
Keyword(s):  
High School ◽  
High School Students ◽  
Muscle Activity ◽  
Energy Supply ◽  
Specific Exercise ◽  
School Students ◽  
Rhythmic Gymnastics ◽  
Music Methods ◽  
Comparative Description ◽  
Terminological Confusion

The study is devoted to the problem of terminological confusion in the concepts of “rhythmic gymnastics” and “classical aerobics”. We present a comparative description of two types of motor activity: rhythmic gymnastics and classical aerobics. The comparison is carried out for 12 criteria: the content of the classes (equipment); specific exercise technique; the physical qualities developed in the classroom; method of exercise; the structure and content of parts of lessons; music; methods of constructing combinations of the motor; pedagogical control; the predominant nature of the energy supply of muscle activity; requirements for equipment; equipment of the hall; instructor’s commands. On the basis of the conducted pedagogical experiment, the methods of the effectiveness of rhythmic gymnastics and classical aerobics is shown. Changes in the indicators of physical fitness of high school students taking part in the experiment are revealed.

scholarly journals Effect of Work-Based Learning Model on Students’ Achievement Motivation

2019 ◽  
Vol 25 (2) ◽  
pp. 204-212
Author(s):  
Dwi Agus Sudjimat ◽  
Luchyto Chandra Permadi
Keyword(s):  
High School Students ◽  
Prior Knowledge ◽  
Achievement Motivation ◽  
Mechanical Engineering ◽  
Traditional Learning ◽  
Vocational High School ◽  
School Students ◽  
Study Program ◽  
Quasi Experimental

This study determines the effect of the Work-Based Learning (WBL) model on achievement motivation of students in the Study Program of Mechanical Engineering at Vocational High Schools (VHS) compared to the Training Within Industry (TWI) model. This study used a quasi-experimental research method with a factorial design in two groups of XII grade vocational high school students of mechanical engineering. The data in the form of achievement motivation was collected using a questionnaire. The data were analyzed using two way Anova technique with α of 0.05. The results showed that (1) the students taught using the WBL model had a significantly higher achievement motivation than the achievement motivation of students taught using the TWI model; (2) students with high prior knowledge had a significantly higher achievement motivation than the achievement motivation possessed by students with moderate and low prior knowledge; and (3) there is an interaction between the use of learning models and students' prior knowledge towards students' achievement motivation. The findings indicated that the WBL model has the potential to improve the quality of learning outcomes of vocational education, especially in increasing students' achievement motivation, compared to traditional learning using the TWI model.

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