Comparison of Cervical Flexor Muscles Thickness During Cranial-Cervical Flexor Exercise According to Pressure Levels and Eye Directions in Healthy Subjects

장종성,이전형 대한물리치료학회 2015 대한물리치료학회지 Vol.27 No.1

Purpose: The purpose of this study is to investigate differences of cervical flexor muscle thickness (i.e., sternocleidomastoid muscle anddeep cervical flexor muscles) depending on levels of pressure bio-feedback unit and eye directions during cranial-cervical flexor exercisein healthy subjects. Methods: A total of 30 subjects (12 males and 18 females) who had no medical history related to musculoskeletal and neurological disorderswere enrolled in this study. They were instructed to perform cranial-cervical flexion exercise with adjustment of five different pressures(i.e., 22 mmHg, 24 mmHg, 26 mmHg, 28 mmHg, and 30 mmHg) using a pressure biofeedback unit, according to three different eyedirections (i.e., 0°, 20°, and 40°). Muscle thickness of sternocleidomastoid muscle and deep cervical flexor muscles was measured accordingto pressure levels and eye directions using ultrasonography. Results: In results of muscle thickness in sternocleidomastoid muscle and deep cervical flexor muscles, the thickness of those muscles wasgradually increased compared to the baseline pressure level (22 mmHg), as levels in the pressure biofeedback unit during cranial-cervical flexionexercise were increasing. In addition, at the same pressure levels, muscle thickness was increased depending on ascending eye direction. Conclusion: Our findings showed that muscle thickness of sternocleidomastoid muscle and deep cervical flexor muscles was generally increasedduring cranial-cervical flexion exercise, according to increase of eye directions and pressure levels. Therefore, we suggested thatlower eye direction could induce more effective muscle activity than the upper eye direction in the same environment during cranial-cervicalflexion exercise.

The Study of Lumbar Erector Spinea and Rectus Abdominis Activations according to the Different Gait Velocities in Young Healthy Adults

장종성,이혜영,이미영 대한물리치료학회 2012 대한물리치료학회지 Vol.24 No.3

Purpose: The purpose of this study was to investigate the lumbar erector spinea and rectus abdominis activations, according to the different gait velocities in young healthy adults. Methods: We recruited 6 young male and 10 young female (mean age=21.43 years; range 19~23) in this study. We used a wireless surface electromyogram (Telemyo 2400T G2, Noraxon, USA) and a treadmill unit for the experiment. EMG activity from the lumbar erector spinea, and rectus abdominis of the dominant side was record with surface electrodes. On different day, all subjects gaited on 2.7 km/h, 4.5 km/h, and 6.3 km/h of speed in random order. They gaited at the same velocity, three times, on the treadmill unit. To reduce fatigue, sufficient rests were given between the measurements. Results: As the gait speed increased, lumbar erector spinea and rectus abdominis activations were significantly increased (p<0.05). Conclusion: In the current study, we found lumbar erector spinea and rectus abdominis activations were changed, according to the gait velocity. We suggested that rehabilitation intervention should be focused on the exercise velocity for the patients with problem of the trunk control. Purpose: The purpose of this study was to investigate the lumbar erector spinea and rectus abdominis activations, according to the different gait velocities in young healthy adults. Methods: We recruited 6 young male and 10 young female (mean age=21.43 years; range 19~23) in this study. We used a wireless surface electromyogram (Telemyo 2400T G2, Noraxon, USA) and a treadmill unit for the experiment. EMG activity from the lumbar erector spinea, and rectus abdominis of the dominant side was record with surface electrodes. On different day, all subjects gaited on 2.7 km/h, 4.5 km/h, and 6.3 km/h of speed in random order. They gaited at the same velocity, three times, on the treadmill unit. To reduce fatigue, sufficient rests were given between the measurements. Results: As the gait speed increased, lumbar erector spinea and rectus abdominis activations were significantly increased (p<0.05). Conclusion: In the current study, we found lumbar erector spinea and rectus abdominis activations were changed, according to the gait velocity. We suggested that rehabilitation intervention should be focused on the exercise velocity for the patients with problem of the trunk control.

신경외과용 수술로봇시스템의 개발

장종성,김형욱,김영수 (사)한국CDE학회 2013 한국 CAD/CAM 학회 학술발표회 논문집 Vol.2013 No.1

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.

난소 임신의 3예

장종성,노영철 최신의학사 1971 最新醫學 Vol.14 No.6

Ovarian pregnancy is a rare type of ectopic gestation. Three cases of ovarian pregnancy have occured during the past 4 year at St. Mary's Hospital, Catholic Medical College, from January 1, 1967 to December 31, 1970. The incidences, causes, symptoms, physiological mechanism, classification and diagnostic criteria of it and comparison with those reported in the literature are presented.

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.

적대적 노이즈를 포함한 교란된 데이터에 대항하여 분류기의 일반화 성능을 확보하기 위한 정규화 방법

장종성(Jongseong Jang),이정인(Jungin Lee),윤지현(Jihyeun Yoon),김경율(Kyungyul Kim),이주열(Jooyoul Lee) 한국정보과학회 2018 한국정보과학회 학술발표논문집 Vol.2018 No.12

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.

메시지 분할을 이용한 RSA 다중서명 방식

장종성 ( Jong Sung Jang ),정광식 ( Kwang Sik Chung ),손진곤 ( Jin Gon Shon ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.1

다중서명에서는 보안적 요소뿐만 아니라 다중서명의 길이, 다중서명의 생성 및 검증 시간, 복호화 시간, 통신량 등도 중요한 요소이다. 기존의 RSA를 그대로 이용한 RSA 원형 다중서명 방식과 RSA를 변형하여 적용한 RSA 변형 다중서명 방식은 다중서명의 생성 및 검증 시간이 각각의 개인서명을 생성하고 검증하는 시간의 합과 비례하여 증가한다는 문제점이 있다. 본 논문은 서명자의 수만큼 분할된 각각의 부분메시지에 대해 RSA 방식을 이용하여 제각기 서명하는 다중서명 방식을 제안한다. 제안된 메시지 분할을 이용한 RSA 다중서명 방식은 블록의 수가 증가하지 않는 경우 기존 방식에 비해 다중 서명의 길이가 증가하지 않으면서, 다중서명의 생성 및 검증 시간이 각각 □로 감소하고, 복호화 시간과 통신량은 각각 약 □~ □로 감소한다.

子宮筋腫의 臨床病理學的 觀察

張鐘成,柳明烈,李憲榮 大韓産婦人科學會 1968 大韓産婦人科學會雜誌 Vol.11 No.3