• International journal of advanced smart convergence
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• v.12 no.3
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• pp.211-220
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• 2023

Surface electromyography (sEMG) is a noninvasive method used to capture electrically muscle activity, which can be easily measured even during exercise. The basic unit of muscle activity is the motor unit, and because an sEMG signal is a superposition of motor unit action potentials, analysis of muscle activity using sEMG should ideally be done from the perspective of motor unit activity. However, conventional techniques can only evaluate sEMG signals based on abstract signal features, such as root-mean-square (RMS) and mean-power-frequency (MPF), and cannot detect individual motor unit activities from an sEMG signal. On the other hand, needle EMG can only capture the activity of a few local motor units, making it extremely difficult to grasp the activity of the entire muscle. Therefore, in this study, a method to visualize the activities of motor units in a single-channel sEMG signal by relocating wavelet coefficients obtained by redundant discrete wavelet analysis is proposed. The information obtained through this method resides in between the information obtained through needle EMG and the information obtained through sEMG using conventional techniques.

• The Korean Journal of Pharmacology
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• v.11 no.1 s.17
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• pp.55-60
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• 1975

An animal which is placed in a new environment displays a complex behavioral pattern consisting of locomotion, grooming and rearing. This behavioral pattern is influenced by endogenous and exogenous stimuli, such as hormonal secretion, level of neurohumoral transmitters, drugs and light. It is widely known that the most tranquilizers depressed spontaneous motor activity although their mechanisms of action were different, while antidepressants stimulated except imipramine which showed various action. Until the present time, the hole-board apparatus, which gives rather subjective data, has been used extensively to study the effects of drugs on general activity and exploratory behavior in mice. Recently a new apparatus for mobility measurements, called a 'Selective Activity Meter' has been introduced. This instrument supposedly produces more objective data on activity and behavior. The purpose of the present experiment was to study the influence of psychotropics on motor activity using the Selective Activity Meter. In the experiment, various psychotropic agents such as major tranquilizers(chlorpromazine, haloperidol); minor tranquilizers(meprobamate, diazepam); and antidepressants(amphetamine, imipramine) were used. In each experiment, the drug was administered to five mice and their activity was recorded. Each experiment was run five or more times and the results are based on the mean of each trial. The results are summarized as follows: 1. The group of mice treated with chlorpromazine showed markedly inhibited motor activity in comparison with controls and the inhibitory action of chlorpromazine was shown to be more intense than any of the other drugs used in the test. Haloperidol administration yielded similar results until 60 minutes, but mice showed less inhibition of motor activity than with chlorpromazine after 90 minutes. 2. In the group treated with diazepam, there was strong inhibition of motor activity until 30 minutes, but after 60 minutes the mice showed less inhibition than with chlorpromazine. In the meprobamate group, motor activity was inhibited in a manner similar to that of other tranquilizers, but the inhibition was less than that of diazepam. 3. In the group treated with imipramine, the inhibition developed gradually after ten minutes. 4. The effects of amphetamine did not appear until 30 minutes after administration, but then there was a significant increase in the motor activity.

• Korean Journal of Pharmacognosy
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• v.24 no.3
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• pp.255-257
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• 1993

We investigated the effects of single administration of Korean earthworm(Lamnodrilus gotai Hatai) juice (KEJ) on blood pressure and spontaneous motor activity in spontaneously hypertensive rats (SHR) and normotensive Wistar-Kyoto rats. We report that KEJ lowered blood pressure and spontaneous motor activity in SHR.

• The Korean Journal of Pharmacology
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• v.12 no.1
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• pp.15-22
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• 1976

The clinical abuse of C.N.S. stimulants during recent years has directed particular attention. Effect of various organs other than C.N.S. was also extensively investigated with those agents. It has been shown that, although there is a wide variation in sensitivity between species, caffeine stimulates gastric secretion in man, cat, guinea pig and dog. Roth and Ivy(1944) reported that caffeine and histamine acted synergistically in stimulating gastric secretion in the cat. Vaille et al(1966) studied that production of pancreatic juice in the rat was enhanced, but bile secretion was not affected by caffeine. In clinical study the effect of chlorpromazine on the external pancreatic secretion in the 24 subjects, the volume fell more than 20% in 7 subjects. (Skajaa et al 1960) It is widely known that C.N.S. stimulants enhanced spontaneous motor activity in the mice, while tranquilizers depressed the activity. Woo (1975) reported that the group of mice treated with chlorpromazine showed markedly inhibited motor activity and in the group of mice treated with amphetamine, there was a significant increase in the motor activity. The purpose of the present experiment was to study the effects of C.N.S. stimulants and depressant on the exocrine pancreas, and on the spontaneous motor activity in the rats. The results obtained are summarized as follows. 1. In animals treated with xanthine derivatives, the volume of pancreatobiliary secretion was markedly increased. 2. Total bilirubin output was elevated markedly in the xanthine derivatives and imipramine treated animals. The bilirubin concentration was increased in xanthine derivatives treated group. 3. The concentration of cholate in the bile was decreased in the chlorpromazine treated group. 4. The activity of lipase in the pancreatobiliary juice was elevated markedly in the xanthine derivatives treated group only. 5. In the all experimental groups, the activity of amylase in pancreatobiliary juice was significantly elevated. 6. In the caffeine treated group, spontaneous motor activity was markedly increased in $30{\sim}60$ minutes, and the amphetamine treated group showed the increased motor activity in first 30 minutes. 7. The group of rats treated with chlorpromazine showed markedly inhibited motor activity after 30 minutes, and the imipramine treated group showed similar result but less inhibition.

• The Journal of Korean Academy of Sensory Integration
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• v.14 no.1
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• pp.9-18
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• 2016

Objective : The current study investigated the effectiveness of group occupational activity program in increasing visual-perception and motor function of children in Community Children Center. Methods : Five children aged between 6-9 years in a community children center participated in the group occupational activity program. The program was designed to facilitate children's visual-perception and motor function based on play occupations. We examined performances of MVPT-3 and BOT-2 before and after the program. Results : Children who participated in the group program showed significant increases in visual perception and motor function. Conclusion : The study revealed the effectiveness of group occupational activity program in promoting visual perception and motor function of children in a community children center, which suggests the possibility of application of occupational activity toward low-income children in the community.

• Proceedings of the KOSOMBE Conference
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• v.1998 no.11
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• pp.289-290
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• 1998

Purpose To investigate the difference of total activation in visual area, motor area, and cerebellum according to the stimulation paradigm. Materials and Methods Functional MR imaging was performed in 5 healthy volunteers with visual and motor activity using EPI technique. LED and Checker-Board stimulation were performed for visual activity. Thumb motion and Finger tapping were performed for motor and cerebellum activity. Time course data was obtained by calculating the total activation which was defined as the number of activated pixels x averaged pixel intensity. Results In the case of visual activity with LED stimulation, we found increased total activity of more than 100% compared with Checker-Board stimulation. In the case of motor area and cerebellum with Finger tapping stimulation, we found increased total activity of more than 100% and 150%, respectively compared with Thumb motion stimulation.

• The Journal of Korean Academy of Sensory Integration
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• v.18 no.1
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• pp.23-33
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• 2020

Objective : The current study investigated the effectiveness of group motor activity programs on motor function and perceived self-efficacy of children in the community children's center. Methods : Nine children aged six to nine years participated in this study. We applied the group motor activity program for 7 sessions. Before and after the intervention, children's motor function and self-efficacy were assessed using the Bruininks-Oseretsky Test of Motor Proficiency, Second Edition, Short Form (BOT-2 SF) and the Perceived Efficacy and Goal Setting, Second Edition (PEGS-2), respectively. Results : The group motor activity program enhanced the motor function and self-efficacy of children. Conclusion : This study showed that the group motor activity program was effective for increasing the objective motor function and the subjective self-efficacy of children in the children's community centers. The result suggests that programs using activities in the community centers can facilitate children's self-development.

• Physical Therapy Rehabilitation Science
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• v.11 no.4
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• pp.571-578
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• 2022

Objective: Cognitive-motor trainings had a positive impact on cognitive function and dual-task trainings led to improvements of global cognitive function. The brain activity of the prefrontal cortex (PFC) is another indicator that can infer cognitive function. This study aims to confirm the usability of the interactive system cognitive-motor training program and the changes in the prefrontal cortex through training. Design: Cross-sectional study Methods: In this study, two cognitive tasks were randomly applied to 20 adults as cognitive-motor training using an interactive system, and the same task was performed using the original method. During all tasks, the brain activity of the prefrontal cortex was measured by the change in oxyhemoglobin (HbO) in real-time using Functional Near-Infrastructure. After performing the tasks, the usability of the developed interactive system was evaluated by a usability questionnaire which consists of five items, and each item consists of a 7-point Likert scale that responds from 1 point to 7 points. Results: The HbO levels were increased during cognitive task performance than at the resting phase. And evaluating the usefulness of the interactive system, a questionnaire result showed that it would be useful for cognitive-motor programs. Conclusions: The cognitive-motor training using the interactive system increased the activity of the prefrontal cortex, and the developed wearable sensor-based interactive system confirmed its usefulness.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.11
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• pp.4197-4206
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• 2010

The purpose of this study was to examine the effects of regular physical activity program on young children's basic motor skills and daily stress. The outdoor physical activity program was conducted with 40 participants who were divided into two groups(experimental group and control group) for 10 weeks twice a week. Results of the study were as following. The outdoor physical activity program improved young children's basic motor skills in the experiment group compared to the control group. Also it had positive effects on the reduction of daily stress in the experimental group compared to the control group. This result suggests that the physical activity program have positive effects on the development of young children's basic motor skills and the reduction of daily stress.

• Journal of Korean Physical Therapy Science
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• v.30 no.4
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• pp.29-43
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• 2023

Background: In the rehabilitation of stroke patients, regular physical activity is very important not only as a treatment for maximal functional recovery but also as a strategy to prevent the recurrence of stroke. The purpose of this study was to objectively measure the amount of physical activity in people with stroke, and to examine the differences in motor and cognitive function according to a level of physical activity. Design: A cross-sectional study. Methods: Physical activity (GENEActiv), motor function (Fugl-Meyer Assessment), cognitive function (Montreal Cognitive Assessment-Korean version), and the Korean version of Modified Barthel Index were evaluated in adult stroke patients with hemiplegia. Results: There was no statistically significant difference in the level of physical activity according to the motor and cognitive function. There was no statistically significant difference in motor and cognitive function according to the level of physical activity, but there was a statistically significant difference in the MBI (p<.01). Conclusion: As a result of the difference in the MBI according to the level of physical activity, it was found that the more moderate to vigorous physical activities are performed, the higher the independence in daily living. These results can be interpreted as that the more often you participate in physical activities such as physical therapy (gait training), the better your independence in ADL. Since regular physical activity participation of adult stroke patients can improve daily living performance, it is considered necessary to participate in physical activities such as continuous physical therapy.