• Korean Journal of Applied Biomechanics
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• v.15 no.3
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• pp.21-30
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• 2005

The purpose of this study is helps to make full use for perfect performance by grasping the defects of Tichonkich motion performed by athlete CSM For this, the study analyzed kinematical variables through Tichonkich motions performed at the first selection competition(1st trial) and final selection competition(2nd trial) for the dispatch to the 28th Athens Olympic Games using the three-dimensional cinematographical method with a high-speed video camera, and obtained the following results. 1. During Tichonkich motion, the execution time of up swing and the right hand moving to the left bar was shorter in the 2nd trial than the 1st one, while the execution time of down swing, the support of the left bar and the right hand moving to the right bar was longer in the 2nd trial than the 1st trial. 2. The horizontal position of COG in the 2nd trial was -35cm in the 1st stage, 42cm in the 3rd stage and 29cm in the 4th stage, that is, it showed a great swing focused on the circular movement compared to the 1st trial, while the vertical position of COG was -59cm in the 2nd stage, that is, it showed a small swing focused on a up and down movement. Also the 5th stage vertical position was 98cm, and the 6th stage vertical position was 95cm in the 2nd trial which were higher than those of the 1st trial, so it has provided magnificence required in the modern gymnastics. 3. And it was indicated that the horizontal velocity at the down swing phase proceeded forward more rapidly in the 2nd trial than that in the 1st trial, and the reverse ascent made a rapid vertical rise lessening left and right velocity change. And in the 5th stage, the 2nd trial was kept very slower in horizontal, vertical and left and right velocity that in the 1st trial, so it reached a handstand with leisurely movement. 4. In the 2nd trial, shoulder joint of the 1st, 2nd, 3rd stages kept a larger angle than that in the 1st trial, that is, it made a great swing while in the 1st trial, it showed a swing movement dependent on kick movement by the flexion and extension of hip joint. Also in the 2nd trial, the body formed a vertical posture with both hands supporting the left bar and hip joint was kept larger as $198^{\circ}$ and $190^{\circ}$ in the 5th and 6th stage than that in the 1st trial, so it made a handstand with the body uprightly stretched out, and magnificent and stable movement.

• Journal of muscle and joint health
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• v.15 no.1
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• pp.62-72
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• 2008

Purpose: There has been a need to integrating the self-help program for arthritis with the Tai Chi for arthritis(SHTCA). The purpose of this study was to develop and to examine the effect of SHTCA for arthritis applying the nine movement Tai Chi. Method: This study was designed the pre-post test, quasi-experimental design. A total 47 participants were recruited in W-city in Korea, an experimental group(26) and a control group(21) at pre-test, but after the eight weeks the composition of the groups were changed to 22 experimental group and 15 control group. The experimental group participated in the SHTCA once a week for eight weeks. SHTCA program consisted of understanding of the arthritis, contracting of the promise, exercise for muscle strength and joint flexibility and the nine movements of Tai Chi exercise. The measures used to examine the effect of the SHTCA were shoulder flexibility, back flexibility, grasping power, balance, abdominal obesity rates, perception of health status, and EQ-5D standardized five dimensions, mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. Results: At The completion of the eight weeks of SHTCA applying the nine movement Tai Chi, the experimental group reported a significance in a number of variables compared to those of the control group: the right shoulder flexibility(p=.018), left shoulder flexibility(p=.031), right grasping power(p=.014), left grasping power(p=.024), the perception of health status(p=.005) and abdominal obesity rates(p=.027). Conclusion: This SHTCA applying the nine movement Tai Chi would be helpful on right shoulder flexibility, left shoulder flexibility, right grasping power, left grasping power, abdominal obesity rates and the perception of health status for arthritis patients.

• Physical Therapy Korea
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• v.15 no.3
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• pp.44-52
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• 2008

The purpose of this study was to investigate the effects of different objects and target location of dominant hand on the non-dominant hand movement kinematics in a bimanual reaching task. Fifteen right-handed volunteers were asked to reach from same starting point to the different target point of right and left hand with grasping the objects of different size. Independent variables were 1) three different object types (small mug cup, name pen, and PET bottle), and 2) three different target locations (shorter distance, same distance, and longer distance than the non-dominant hand) of the dominant hand. Dependent variables were movement time (MT), movement distance (MD), movement mean velocity ($MV_{mean}$), and movement peak velocity ($MV_{peak}$) of the non-dominant hand. Repeated measures two-way analysis of variance (ANOVA) was used to test for differences in the non-dominant hand movement kinematics during bimanual reaching. The results of this study were as follows: 1) MT of the non-dominant hand was increased significantly when traveling with grasping the mug cup and reaching the far target location, and was decreased significantly when traveling with grasping the PET bottle and reaching the near target location of the dominant hand. 2) MD of the non-dominant hand was significantly increased during reaching the far target location, and significantly decreased during reaching the near target location with dominant hand. 3) $MV_{mean}$ of the non-dominant hand was increased significantly when traveling with grasping the PET bottle, and was decreased significantly when traveling with grasping the mug cup of the dominant hand. Therefore, it can be concluded that the changes of the ipsilateral hand movement have influence on coupling of the contralateral hand movement in bimanual reaching.

• The Journal of Korean Academy of Prosthodontics
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• v.20 no.1
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• pp.83-91
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• 1982

The mandibular movement during mastication has been studied, however there is still much controversy, therefore the purpose of this study was to establish the fundamental data in order to provide the functional occlusion and information in prosthodontic treatment, and the diagnosis of temporomandibular joint disorder. The author analyzed the characteristics of the border and masticatory movements using the Mandibular Kinesiograph. The value, direction, deviation angulation of the border and masticatory movements were studied on the sagittal and frontal planes in 24 male subjects age of 22-28 without orofacial problems. The obtained results were as follows: 1. The values of border movement on the sagittal plane were an average of $25.81{\pm}5.14mm$ in vertical component and $24.37{\pm}3.76mm$ in ant-post component, and the posterior terminal hinge movement, $9.31{\pm}3.62mm$ in vertical component and $7.59{\pm}2.65mm$ in ant-post. component. 2. The distribution range of the masticatory movement within the border movement was an average of $19.2{\pm}12.81%$ of maximum ant-post, values and $55.5{\pm}16.1%$ of maximum values of border movement, and the movement path, for the most part, was directed to posterior deviation and ranged from 0.98 to 12.00mm, on an average of $5.15{\pm}3.49mm$. 3. On the frontal plane, a number of left and right deviation in 24 subjects was same, however, the right deviation was an average of $2.51{\pm}1.67mm$ compared with the left deviation. 4. On the frontal plane, the point of maximum lateral deviation was an average of $49.7{\pm}11.0%$ of maximum opening values. 5. The angulation between the terminal hinge movement path and the masticatory path was an average of $24.00{\pm}4.65$.

• The Journal of Korean Physical Therapy
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• v.31 no.3
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• pp.157-160
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• 2019

Purpose: We compared the activation pattern of the mirror neurons (MN) between two types of hand movement according to action observation using functional MRI. Methods: Twelve right-handed healthy subjects (5 male and 7 female, mean age $21.92{\pm}2.02years$) participated in the experiment. During fMRI scanning, subjects underwent two different stimuli on the screen: 1) video clips showing repeated grasping and releasing of the ball via simple hand movement (SHM), and (2) video clips showing an actor performing a Purdue Pegboard test via complex hand movement (CHM). paired t-test in statistical parametric mapping (SPM) was used to compare the activation differences between the two types of hand movement. Results: CHM as compared with the SHM produced a higher blood oxygen level dependent (BOLD) signal response in the right superior frontal gyrus, left inferior and superior parietal lobules, and lingual gyrus. However, no greater BOLD signal response was found by SHM compared with CHM (FWE corrected, p<0.05). Conclusion: Our findings provided that the activation patterns for observation of SHM and CHM are different. CHM also elicited boarder or stronger activations in the brain, including inferior parietal lobule called the MN region.

• Fire Science and Engineering
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• v.16 no.4
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• pp.7-14
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• 2002

The diffusion characteristics of the smoke by effect of an ascending air movement in a local part of the room where heat generated was studied. How the smoke move in the limited parts of the room at which heat generated was studied through 3 cases altering locations of inlet and outlet of ventilated air and heat generated by CFD(Computational Fluids Dynamics) method. It was found that 1. Similar distribution of air velocity, air temperature and smoke concentration appeared in the case of upper left inlet and lower right outlet and the case of lower inlet and upper right outlet. 2. Distribution of temperature and smoke concentration was 0∼0.3, 0.06∼0.14 in the case of lower left inlet and upper right outlet. 3. the location of heat generation did not influence on the temperature distribution, but influence on the distribution of smoke concentration.

• Journal of The Korean Society of Integrative Medicine
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• v.7 no.4
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• pp.131-140
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• 2019

Purpose : The purpose of this study was to investigate the interrelationship between eye movement and auditory function through the effects of eye lateralization on transient evoked otoacoustic emissions of auditory function. Methods : 25 subjects with complete set of ears were used in this study, which composed of 12 males and 13 females with pure tone threshold of below 25 dB without otolaryngology were evaluated. Each of the patient has a visual acuity of greater than 1.0 after correction, and has no problems with eye disease, eye movement, and human parallel system. In a dark silent room, the subjects sat on a chair with their heads fixed on a headrest. The tests were performed by asking the patients to look at a fixed red light dot on a light bar in front of them. This light was directed to the front, right and left sides of the subject at an angle of 40 ° In the presence of the stimulus sound in the ipsilateral ear, the transient evoked otoacoustic emissions of the ipsilateral ear was measured at the straight, right and left fixation. In order to evaluate the transient evoked otoacoustic emissions through the efferent auditory pathway, the transient evoked otoacoustic emission values of the contralateral ear were measured at the straight, right and left fixation. These measurements were taken at frequencies of 1 kHz, 1.4 kHz, 2.0 kHz, 2.8 kHz and 4 kHz, respectively. Results : Transient evoked otoacoustic emissions caused by lateral movement of the eye showed significant changes at 1.4 KHz and 2 KHz of the afferent pathway of the ipsilateral ear. Also, significant changes were observed at 1.4 KHz and 4 KHz of the efferent pathway of the contralateral ear. Conclusion : These results indicated that there is a close relationship between eye movement and auditory cochlea. In the future, further studies considering more diverse subjects and age groups will be needed.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.9 no.1
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• pp.67-72
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• 2015

The system for controlling the robotic arm through the foot motion detection was implemented for the disabled who not free to use of the arm. In order to get an image on foot movement, two cameras were setup in front of both foot. After defining multiple regions of interest by using LabView-based Vision Assistant from acquired images, we could detect foot movement based on left/right and up/down edge detection within the left/right image area. After transferring control data which was obtained according to left/right and up/down edge detection numbers from two foot images of left/right sides through serial communication, control system was implemented to control 6-joint robotic arm into up/down and left/right direction by foot. As a result of experiment, we was able to get within 0.5 second reaction time and operational recognition rate of more 88%.

• Physical Therapy Korea
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• v.9 no.3
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• pp.67-76
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• 2002

We report the reorganization of motor network resulted from intensive unilateral coordination training and the effect of cross education on the untrained side in patient with traumatic brain injury using functional magnetic resonance imaging (fMRI). A 22 year-old male patient who had suffered from diffuse axonal injury for 58 months showed coordination deficit in the left hand at initial examination. Intensive motor training including complex finger movements and coordination activities using a metronome was introduced to the patient 4 hours per day for a week. FMRI was performed on a 3T ISOL Forte scanner. All functional images were analyzed using SPM-99 software. Hand function was improved after training not only in the trained left hand, but also in the untrained right hand. There was no activation in the right primary motor area (M1) during left hand movement before training whereas robust activation of left M1 was demonstrated by the right hand movement. Profuse activation of bilateral prefrontal lobes was seen during both hand movements before training. After training of left hand, right M1 became prominently activated during the left hand motion. The activation of bilateral prefrontal lobes disappeared after training not only for the left hand movement but also for the right, which clearly demonstrated the effect of cross education. This case report demonstrated the learning-dependent reorganization of the M1 and the effect of cross education.

• IE interfaces
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• v.14 no.3
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• pp.302-309
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• 2001

Direction-of-motion stereotypes between ON/OFF controls were tested using a paper-and-pencil test and interview method. One hundred and forty eight subjects of both genders and from a wide range of ages were asked to indicate the control movement they would make to turn on the light. Stereotypes were obtained for nine types of ON/OFF controls in two different planes. The results show that stereotype for left-right power switches is right for on, and stereotype for up-down switches is up. And, a strong stereotype was found in the case of left-right switches than up-down switches. Some stereotypes are significantly different between genders and age groups. These findings identified in this study can be used to design the ON/OFF switches of the facilities and equipments.