http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Effect of Horse Riding Simulator Exercise on Thickness of Transverse Abdominis in Healthy Adults
( Jaehyo Park ),( Youngmi Kim ) 대한물리치료학회 2019 대한물리치료학회지 Vol.31 No.2
Purpose: This study examined the effects of horse riding simulator exercise on the thickness changes in the transverse abdominis in normal adults. Methods: Forty-five healthy adults were recruited and randomized to a horseback riding simulation exercise group (n=15), a sling exercise group (n=15), and a trunk stabilization exercise group (n=15). A horseback riding simulator offers the indoor experience of horseback riding and mimics the rhythmic movement of horseback riding, thereby provided a virtual environment, such as riding a real horse on the front screen. The velocity of the horse riding simulator exercise was regulated within the subject’s ability to control the exercise on the horse riding simulator. A sling exercise group performed sling exercise under the inspection of the experimenter. In the trunk stabilization exercise group, the subjects were instructed to perform the exercise accurately and pause the session when pain occurred during the intervention. The subjects in each group carried out the interventions three times per week for six weeks. The thickness of the transverse abdominis was measured using a pressure biofeedback unit and the ultrasound. Results: Significant differences in the thickness of transverse abdominis within the groups were observed between before and after the interventions. On the other hand, there were no differences in the parameters among the groups. Conclusion: Horse riding simulator exercise can be an alternative to trunk stabilization exercise by increasing the thickness of the transverse abdominis in healthy adults.
Jaehyo Kim,Makoto Sato,Yasuharu Koike 제어·로봇·시스템학회 2002 International Journal of Control, Automation, and Vol.4 No.1
We show that humans execute the postural control ingeniously by regulating the impedance properties of the musculo-skeletal system as the motor command against the alteration of the environment. Adjusting muscle activity can control the impedance properties of the musculo-skeletal system. To quantify the changes in human arm viscoelasticity on the vertical plane during interac-tion with the environment, we asked our subject to hold an object. By utilizing surface electromyographic(EMG) studies, we deter-mined a relationship between the perturbation and a time-varying muscle co-activation. Our study showed when the subject lifts the object by himself the muscle stiffness increases while the torque remains the same just before the lift-off. These results suggest that the central nervous system(CNS) simultaneously controls not only the equilibrium point(EP) and the torque, but also the muscle stiffness as themotor command in posture control during the contact task.
Effect of Horse Riding Simulator Exercise on Thickness of Transverse Abdominis in Healthy Adults
Park, JaeHyo,Kim, YoungMi 대한물리치료학회 2019 대한물리치료학회지 Vol.31 No.2
Purpose: This study examined the effects of horse riding simulator exercise on the thickness changes in the transverse abdominis in normal adults. Methods: Forty-five healthy adults were recruited and randomized to a horseback riding simulation exercise group (n=15), a sling exercise group (n=15), and a trunk stabilization exercise group (n=15). A horseback riding simulator offers the indoor experience of horseback riding and mimics the rhythmic movement of horseback riding, thereby provided a virtual environment, such as riding a real horse on the front screen. The velocity of the horse riding simulator exercise was regulated within the subject's ability to control the exercise on the horse riding simulator. A sling exercise group performed sling exercise under the inspection of the experimenter. In the trunk stabilization exercise group, the subjects were instructed to perform the exercise accurately and pause the session when pain occurred during the intervention. The subjects in each group carried out the interventions three times per week for six weeks. The thickness of the transverse abdominis was measured using a pressure biofeedback unit and the ultrasound. Results: Significant differences in the thickness of transverse abdominis within the groups were observed between before and after the interventions. On the other hand, there were no differences in the parameters among the groups. Conclusion: Horse riding simulator exercise can be an alternative to trunk stabilization exercise by increasing the thickness of the transverse abdominis in healthy adults.
Dry electrode made from carbon nanotubes for continuous recording of bio-signals
Jung, Jaehyo,Shin, Siho,Kim, Youn Tae Elsevier 2019 MICROELECTRONIC ENGINEERING Vol.203 No.-
<P><B>Abstract</B></P> <P>Health monitoring devices have received attention from individual users and clinicians. For example, the wet-type silver/silver chloride (Ag/AgCl) electrode is used to record bio-signals such as electrocardiogram (ECG) and electromyogram (EMG). However, when used for long durations, an Ag/AgCl electrode with an electrolyte gel causes signal distortion and degradation and can irritate the skin. In this study, we developed a dry-type self-adhesive electrode composed of a mixture of carbon nanotubes and adhesive-polydimethylsiloxane. This electrode can be attached to the skin by creating a vacuum between the epidermal and electrode surfaces, allowing for long-term recording of bio-signals without side effects. We analyzed the electrical and mechanical characteristics and verified the performance of the proposed electrode compared to that of an Ag/AgCl electrode by conducting ECG and EMG measurements. Moreover, the composite electrode was attached to the skin for one week, and no skin irritation, itchiness, or remarkable degradation of the bio-signals such as ECG was observed. This electrode enables long-term health monitoring of patients with chronic conditions. Additionally, this comfortable electrode can be applied to a wearable device, including for bio-signal detection.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Developed a dry-type self-adhesive electrode, which comprises a mixture of CNT and aPDMS. </LI> <LI> This electrode can be attached to the skin by creating a vacuum between the epidermal and electrode surfaces. </LI> <LI> This electrode was attached to the skin, and no skin irritation, itchiness, or remarkable degradation of bio-signals such as ECG was noted. </LI> <LI> This electrode is expected to be applicable as a continuous monitoring instrument, such as a Holter, and to record EMG. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
김재효(Kim JaeHyo),강연석(Kang YeonSeok),고호경(Ko HoKyoung) 한국의사학회 2010 한국의사학회지 Vol.23 No.2
Currently, in Korea, all lengths are written in “meter” unit, and the non-statutory measuring units are banned for use. However, in some fields, traditional measuring units are widely used with necessary modifications, and people in such fields raise varying arguments on conversion to “meter” unit. This research examines traditional measuring units from historical and cultural viewpoints, and provides suggestions on how to improve consistency and standardization for more accurate and effective exchange of scientific opinions.
Muscle Synergy Analysis for Stroke During Two Degrees of Freedom Reaching Task on Horizontal Plane
Hyeonseok Kim,Jongho Lee,Jaehyo Kim 한국정밀공학회 2020 International Journal of Precision Engineering and Vol.21 No.2
This study aimed to investigate muscle synergies from major muscles that contribute to each degree of freedom (DOF) in a low DOF task with trunk restraint during a fundamental reaching task used frequently in daily life. Seven non-patients (controls) and eleven stroke patients (mild or severe groups) in Brunnstrom stage 2–4 recovery were assessed. Subjects performed two DOF reaching tasks requiring motor coordination of the elbow and shoulder on the horizontal plane. Electromyography signals were measured during the task, and muscle synergy data extracted from them were analyzed using cluster analysis. No significant differences were noted between patients with stroke and healthy subjects in terms of the coefficient of determination, R-squared, determined according to the number of modules. Cluster analysis revealed that each of the clusters in the control and mild groups was governed by one channel. However, one cluster in the severe group was governed by two channels. When the clusters of the mild group and the control group were compared, the highest similarities (all values exceeded 0.9) were noted between the corresponding clusters of the two groups. All other similarity values were < 0.8. A similar trend was noted when the severe group clusters were compared with control group clusters; however, only three corresponding pairs of clusters exhibited similarity values exceeding 0.9, while the rest were < 0.8. Muscle synergies during the two DOF reaching tasks with trunk restraint showed differences in extensors between healthy individuals and patients with stroke.