뇌졸중 환자에서 상지의 경상 운동의 변화 연구

장종성 ( Jong Sung Chang ),이미영 ( Mi Young Lee ),김중선 ( Chung Sun Kim ) 대한물리의학회 2008 대한물리의학회지 Vol.3 No.4

체간에 무게 부하를 적용한 정상 성인의 보행 분석

장종성 ( Jong Sung Chang ),최진호 ( Jin Ho Choi ),이미영 ( Mi Young Lee ),김명권 ( Meuung Kwon Kim ) 대한물리의학회 2012 대한물리의학회지 Vol.7 No.1

Purpose:The study was designed to investigate analysis of kinematics of lower extremity in healthy adults during walking with external loads on trunk. Methods:Fifteen healthy adults were recruited and The subjects provided written and informed consent prior to participation. They walked on a ten-meter walkway at a self-selected pace with loads of 0, 5, 10, and 15kg. They completed three trials in each condition and kinematic changes were measured. A three-dimensional motion analysis system was used to analyze lower extremity kinematic data. The data collected by each way of walking task and analyzed by One-way ANOVA. Results:There were significant differences in hip and knee joint on saggittal plane at initial contact and preswing, and significant differences in ankle joint on transverse plane at preswing. Conclusion:These findings revealed that increased external loads were changed joint angles and influenced postural strategies because of kinematic mechanism and future studies is recommended to find out prevention from damage of activities of daily living.

시열반응과제의 운동학습이 대뇌피질 활성화의 변화에 미치는 영향

권용현 ( Yong-hyun Kwon ),장종성 ( Jong-sung Chang ),김중선 ( Chung-sun Kim ) 대한물리치료학회 2009 대한물리치료학회지 Vol.21 No.1

Purpose: Numerous investigators demonstrated that adaptative changes were induced by motor skill acquisition in the central nervous system. We investigated the changes of neuroelectric potential following motor learning with serial reaction time task in young healthy subjects, using electroencephalography (EEG). Methods: Twelve right-handed normal volunteers were recruited, who have no history of neurological dysfunction and were given to written the informed consent. All subjects were assigned to flex to extend the wrist joint or flex the thumb for pressing the matched button as quickly and accurately as possible, when one of five colored lights was displayed on computer screen (red, yellow, green, blue, white). EEG was measured, whenfive types simulations ware presented randomly with equal probabilities of 20% in total 200 times at the pre and post test. And they were scheduled for 30 minutes practice session during two consecutive days in the laboratory. Results: The results showed that the reaction time at the post test was significantly reduced, compared to one of the pre test in serial reaction time task. In EEG map analysis, the broaden bilateral activation tended to be changed to the focused contralateral activation in the frontoparietal area. Conclusion: These findings showed that acquisition of motor skill led to product more fast motor execution, and that motor learning could change cortical activation pattern, from the broaden bilateral activation to the focused contralateral activation. Thus we concluded that the adaptative change was induced by motor learning in healthy subjects.

편측 무시 환자에서 시각 정보 차단이 머리 위치 정렬에 미치는 영향: 사례 연구

장종성 ( Jong Sung Chang ),박정미 ( Jung Mi Park ),이미영 ( Mi Young Lee ) 대한물리의학회 2013 대한물리의학회지 Vol.8 No.3

PURPOSE: The Unilateral neglect is characterized bydifficulty shifting attention to the side of space opposite thebrain lesion and frequently reducing use of contralesionalextremities. This study was to identify whether the visualdeprivation was responsible for head position on unilateralneglect patient after stroke.METHODS: A patient with left middle cerebral arteryinfarction participated in the study. We assessed neglect usingline bisection and star cancellation test. Patient was instructedto maintain correct alignment of trunk and head in a sitposition. We evaluated degree of head lateral tilting androtation. Then, patient was blocked visual input. Also, weevaluated head position in the same way.RESULTS: He scored 3 points in the line bisection test and9 points star cancellation test. In postural evaluation, he haddeviated posture such as lateral head tilting and rotation. Aftervisual cue deprivation, patient showed different head positionwhich was decreased degree of head tilting and rotation.CONCLUSION: For vertical body orientation, it wasused multiple sensory references including the vestibular,somatosensory, and visual system. This finding suggestedthat abnormal posture of neglect patient could be related to thevisual input. It has important clinical implications in terms ofunderstanding the neglect.

아기띠를 사용하여 보행 시 팔의 보조가 목, 허리 및 다리 근활성도에 미치는 영향

장종성 ( Jong Sung Chang ),이상열 ( Sang Yeol Lee ),이명희 ( Myoung Hee Lee ),김중휘 ( Joong Hwi Kim ),김철용 ( Chul Yong Kim ) 대한물리의학회 2010 대한물리의학회지 Vol.5 No.3

Purpose:The purpose of this study was to evaluate the effects of muscle activation of neck, lumbar and low limb by using baby carrier with arms during walking. Methods:Twenty healthy and young females who brought up infants and had no musculoskeletal disorders of neck, lumbar and low limb were recruited for this study. They were instructed to perform muscle activation of neck, lumbar and low limb using the baby carrier with and without arms during walking. ProComp infinitiTM (Thought Technology Ltd., Canada) was used to measure the muscle activity of neck, lumbar and lower extremity muscles. Results:Activation of neck paraspinalis muscle was significantly increased using baby carrier with arms and there was a significant increase on erector spinae muscle activation by using anterior baby carrier. Conclusion:These results indicate that the muscle activation was changed by arms assist and the position of using baby carrier. Therefore, it could be considered relationship of muscle activation and musculoskeletal demage as carrying baby.

정상 성인에서 착지 시 착지 높이가 근활성도와 지면반발력에 미치는 영향

장종성 ( Jong Sung Chang ),이미영 ( Mi Young Lee ) 대한물리의학회 2011 대한물리의학회지 Vol.6 No.2

Purpose:The study was designed to investigate the effects of landing heights on muscle activities and ground reaction force during drop landing. Methods:Sixteen healthy adults were recruited along with their written informed consent. They performed a drop-landing task at the height of 20, 40, and 60cm. They completed three trials in each condition and biomechanical changes were measured. The data collected by each way of landing task and analyzed by One-way ANOVA. Ground reaction forces were measured by force flate, muscle activities measured by MP150 system. Results:There were significant differences in ground reaction forces, and significant increases in muscle activities of tibialis anterior, medial gastrocnemius and biceps femoris with landing heights. Conclusion:These findings revealed that heights of landing increases risk factors of body damage because of biomechanical mechanism and future studies should focus on prevention from damage of external conditions.

보행 시 편평족에서 외적 무게 부하에 따른 족저압의 변화

장종성 ( Jong Sung Chang ),박지원 ( Ji Won Park ),김중선 ( Chung Sun Kim ) 대한물리의학회 2010 대한물리의학회지 Vol.5 No.4

Purpose:The study was designed to investigate the changes of plantar foot pressure by different loads during walking in flatfoot. Methods:Fifteen subjects with flatfoot were recruited along with their written informed consent. They were asked to walk on plate at a self-selected and comfortable speed with loads of 0, 5, 10, and 15㎏. Three walking trials were obtained and then averaged for data analysis. Foot pressure were measured from RS-Scan system (RS-Scan system, RS scan Ltd., German) and contact area, maximum force were analyzed. Results:There were significant increases on midfoot and decreases on forefoot in contact area. And there were significant increases in maximum force of foot pressure of 2nd metatarsal bone and midfoot. Conclusion:These findings revealed that flatfoot increases risk factors of metatarsal bone with different loads. Therefore, patients of flatfoot must be careful during walking with loads or activities of daily living.

장애물 높이에 따른 성인과 노인의 족저압 분포 비교

장종성,이명희,Chang, Jong-Sung,Lee, Myoung-Hee 대한물리치료학회 2014 대한물리치료학회지 Vol.26 No.4

Purpose: The purpose of this study was to compare plantar foot pressure distribution in adults and elderly according to obstacle height. Methods: Nine healthy adults and nine older adults were recruited and the subjects provided written informed consent consent prior to participation. Both groups walked and crossed obstacles with heights of 0%, 10%, 20%, and 30% of their height. Foot pressure was measured by peak pressure using the Pedar System (Novel Gmbh, Germany) during obstacle walking with barefeet in shoes. Three trails were calculated on eight areas and then averaged for data analysis. Results: A significant difference in great toe, little toes, and lateral metatarsal area was observed between adults and elderly groups, but other areas did not show significant differences. Foot pressure was increased in groups according to obstacle height. Conclusion: These findings showed that change in foot pressure distribution is more lateral in elderly in order to maintain postural control during obstacle crossing.

뇌졸중 환자에서 보행 속도와 근활성도 및 족저압의 상관관계

장종성,이상열,이명희,최용원,이현민,오현주,Chang, Jong-Sung,Lee, Sang-Yeol,Lee, Myung-Hee,Choi, Yong-Won,Lee, Hyun-Min,Oh, Hyen-Ju 대한물리치료학회 2009 대한물리치료학회지 Vol.21 No.3

Purpose: To examine the correlation between the gait speed and muscle activation or foot pressure in stroke patients. Methods: Twenty five functionally ambulant stroke patients (male/female: 15/10, mean age: $57.65\pm2.30$) were enrolled in this study. The patients were asked to walk on a plate at a self-selected and comfortable speed. Three walking trials were obtained and then averaged for data analysis. The gait speed and foot pressure were measured from a RS-Scan system. Activation of the quadriceps femoris muscle and biceps hamstring muscle (%RVC) were recorded using ProComp $Infiniti^{TM}$. Results: There was a significant positive correlation between Hamstring muscle activation (%RVC) and gait speed. The gait speed correlated with the foot pressure of the lateral metatarsal zone (M3-5) in the affected side. There was a correlation between the gait speed and the foot pressure of the lateral metatarsal (M3-5) and heel (medial, lateral) zone in the less-affected side. Conclusion: The gait speed is related to hamstring muscle activation and the characteristics of foot pressure. This information was observed in both the affected and less-affected sides, suggesting that rehabilitation programs should be implemented on both sides.

선 자세에서 이중과제 수행에 따른 자세 동요와 근활성도 변화

최진호,이한숙,장종성,Choi, Jin-Ho,Lee, Han-Suk,Chang, Jong-Sung 대한물리치료학회 2011 대한물리치료학회지 Vol.23 No.5

Purpose: This study was designed to investigate the changes of postural sway and muscle activation while standing upright and performing a dual task. Methods: Nine healthy adults were recruited and provided their written informed consent. They performed a balance task with and without a cognitive task on a force flatform (Good balance, Metitur Ltd., Filand). Postural sway was measured as medio-lateral and anterior-posterior distance and the velocity of the center of pressure and muscle activations of the ankle dorsi- and plantar-muscle was measured. The recruits completed three trials and the data was analyzed by a paired t-test. Results: There were significant differences in the medio-lateral and anterior-posterior distance and the velocity of the center of pressure, and significant increases in the muscle activities of the tibialis anterior. Conclusion: These findings revealed that performing a dual task increases postural sway and muscle activation of the ankle when simultaneously maintaining balance and performing another cognitive task. Future studies should focus on balance training with a dual task for patients.