• 한국정밀공학회지
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• 제28권6호
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• pp.657-682
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• 2011

This paper presents the dynamic analysis on the joint torque of a finger for the tip pinch task. The dynamic model on finger movement was developed in order to predict the joint torques of an index finger, and the finger was assumed as a three-link planar manipulator. Analysis of the model revealed that the joint stiffness was one of the most important parameters affecting the joint torque. The stiffness of the finger joint was experimentally measured, and it was used in analyzing the finger joint torque required for performing the tip pinch task. The obtained joint torque for the tip pinch task will be used as the design requirements of the finger exoskeletal orthosis actuated by the polymer actuator whose allowable torque limit is relatively low compared to that of a mechanical actuator.

• 대한물리의학회지
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• 제16권4호
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• pp.103-116
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• 2021

PURPOSE: This study examined the effects on the upper extremity function, muscle strength, and hand function of a task-oriented training approach using a percussion instrument for patients with chronic stroke. METHODS: Twenty-four chronic stroke patients accompanied with upper extremity hemiplegia were selected for research and were classified randomly into 12 experimental groups and 12 control groups. The experimental group performed a task-oriented approach, and the control group performed upper extremity occupational therapy. Stroke upper extremity test, Jebsen-Taylor Hand Function test, upper extremity muscle strength test, and hand muscle strength test were measured before and after training in the evaluation process. RESULTS: In the upper extremity test and Jebsen-Taylor test, there were no significant differences between the groups. In the upper extremity muscle strength test, there were significant differences in shoulder flexion, internal rotation, and elbow flexion in the experimental group. In the hand muscle strength test, there were significant differences in the grip, tip Pinch, lateral Pinch, and 3-jaw chuck in the experimental group and significant differences in only grip, tip pinch, and lateral pinch in the control group. In addition, there were significant differences in the lateral pinch compared to the amount of change. CONCLUSION: Task-oriented approach using percussion instruments for upper extremity rehabilitation in stroke patients is effective in the upper extremity function and strength, hand function, and strength.

• 한국정밀공학회지
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• 제29권7호
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• pp.717-722
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• 2012

This paper presents the design and dynamic model of the finger exoskeleton actuated by Ionic Polymer Metal Composites (IPMC) to assist a tip pinch task. Although this exoskeleton will be developed to assist 3 degree-of-freedom motion of each finger, it has been currently made to perform the tip pinch task using 1 degree-of-freedom mechanism as the first step. The six layers of IPMC were stacked in parallel to increase the low actuation force of IPMC. In addition, the finger dummy was manufactured to evaluate the performance of the finger exoskeleton. The pinch task experiments, which were performed on the finger dummy with the developed exoskeleton, showed that the pinch force close to the desired level was obtained. Moreover, the dynamic model of the exoskeleton and finger dummy was developed in order to perform the various analyses for the improvement of the exoskeleton.

• 한국산학기술학회논문지
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• 제16권2호
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• pp.1153-1163
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• 2015

본 연구는 수부손상환자를 대상으로 과제 지향적 활동이 손 기능에 미치는 효과를 알아보고자 하였다. 2011년 12월부터 2012년 10월까지 경남 창원에 위치하는 C병원에 내원한 16명의 수부손상환자를 두 그룹으로 무작위 할당한 후 실험군에 과제 지향적 활동을 1일 1회, 주 3회, 4주 동안 적용하고 그룹 간 비교를 실시하였다. 과제 지향적 활동군은 캐나다 작업수행측정(Canadian Occupational Performance Measure; COPM)을 통해 대상자가 선호하는 일상생활활동영역에 대한 과제를 제공하였다. 이때 중재의 효과를 검증하기 위해 손 기능 평가로 장악력 검사, 파악력 검사, 엄지의 맞섬, 손가락의 벌림 범위와, Purdue pegboard test, Disabilities of the Arm, Shoulder, and Hand(DASH)를 사용하였다. 중재 전후 비교에서 과제 지향적활동군은 모든 손 기능 평가에 유의하게 향상되었고(p<.05), 대조군의 손 기능도 유의하게 향상되었다(p<.05). 그룹 간 비교에서 과제 지향적 활동군은 손끝집기, 측면집기, 세점집기, Purdue pegboard test, DASH에서 대조군과 유의한 차이가 있었으나(p<.05), 장악력 검사와 엄지의 맞섬 및 손가락의 벌림 범위는 그룹 간 유의한 차이가 없었다. 본 연구의 결과를 통해 과제지향적 활동이 수부손상환자의 손 기능 향상에 더 효과적임을 알 수 있었다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2011년도 춘계학술대회 논문집
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• pp.1591-1592
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• 2011

• 재활치료과학
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• 제8권2호
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• pp.43-53
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• 2019

목적 : 본 연구의 목적은 Upper extremity performance test for elderly (TEMPA)의 한국 노인 표준치를 제시하고, 수집된 자료를 바탕으로 한국 노인의 연령별, 성별 손 기능의 특성과 근력의 차이를 알아보는 것이다. 연구방법 : 연구에 참여한 대상자는 60세 이상의 손 기능에 장애가 없는 노인 103명이었다. 손 기능의 특성을 알아보기 위하여 모든 대상자에게 TEMPA 평가를 시행하였고, Jarmar dynamometer, pinch gauge를 사용하여 손과 손가락 근력을 평가하였다. 결과 : 나이가 증가함에 따라 수행 속도와 소 근육의 움직임의 질이 유의미하게 감소하였다. 남성 노인의 수행 속도와 소 근육 움직임의 질이 여성 노인보다 더 높게 유지 되었다. 노인의 손과 손가락의 근력 또한 연령이 증가함에 따라 유의미하게 감소하였다. 결론 : 작업치료사는 노인의 손 기능과 근력 감소에 대한 관심을 가지고 그 기능 수준을 유지하기 위한 중재를 제공하는 것이 필요할 것이다. 본 연구를 통해 TEMPA의 한국 노인 표준치가 확립되었다. 이 자료가 임상적 평가 및 근거 기반의 연구에 있어 유용하게 쓰이기를 기대한다.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2012년도 춘계학술대회 논문집
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• pp.1305-1306
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• 2012

• 재활치료과학
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• 제9권4호
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• pp.7-20
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• 2020

목적 : 본 연구는 뇌졸중 환자들의 상지기능 개선을 위해 말초신경감각자극과 과제지향적 훈련의 동시적용하여 효과를 알아보는 것이다. 연구방법 : 본 연구는 29명의 편마비 환자를 대상으로 수행하였다. 말초신경감각자극과 과제지향적 훈련을 동시에 적용한 실험군은 14명, 과제지향적 훈련만 실시한 대조군은 15명으로 주5회, 회기당 30분씩, 총 4주간 진행하였다. 결과측정은 손목과 어깨근육의 자발적 근수축 비율과 상자와 나무토막 검사, 잡기와 쥐기의 근력, Action Research Arm Test를 사용하여 중재 전·후로 측정하였다. 결과 : 4주간의 중재 후 짧은노쪽손목폄근, 노쪽손목굽힘근의 근 활성도와 잡기 근력, Action Research Arm Test에서 실험군은 대조군 보다 유의한 개선을 나타냈다. 결론 : 말초신경감각자극과 과제지향적 훈련의 동시적용은 과제지향적훈련만 하는 것보다 뇌졸중 환자의 상지기능 개선에 보다 효과적이었다.

• 대한인간공학회지
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• 제25권2호
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• pp.155-160
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• 2006

Motor intentional disorders have been studied by visual examination methods such as cross-response task and Luria loop. To provide more analytical, quantitative information for motor intentional disorders, the present study developed a method which evaluates force control capabilities by the index finger. The assessment method analyzes the finger force control capabilities at four stages(initiation, development, maintenance, and termination) with NK Pinch-GripTM(force resolution= 0.098 N; temporal resolution=50Hz). By applying the assessment method, a patient(age=66) with callosal legion was compared with 6 healthy males(mean age=65.5, SD=2.8), showing significant but different decreases in force control capabilities depending on hand and response location. The assessment method would be of use to better understand various aspects of motor intentional disorders such as the effects of the disorders to the neurological network of the brain and severity assessment of the disorders.

• 한국산업보건학회지
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• 제19권4호
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• pp.412-422
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• 2009

This study was conducted to assess exposure to musculoskeletal disorder(MSD) risk factors in hospital personnel who performed non-routinized work tasks. A tool ("PATH-KOSHA" version) was newly revised from PATH(Posture, Activity, Tools and Handling) method and uploaded into a personal digital assistant(PDA). The version was used, on a basis of direct-observation, to collect PATH data at the 2 hospital settings in different regions. Job analysis was performed to get various information (e.g., work and rest time, task type) as well. The data collected were visually checked for data cleaning and stored for future data analysis. A total of 1,992 PATH observations were made for 37 hospital workers. Exposure levels varied across 18 items of the MSD risk factors. The highest percent time spent on non-neutral postures was 53% for wrist deviation, followed by 47%(pinch grip), 35%(trunk posture), 23%(neck posture), and 20%(shoulder/arm posture). The highest percent time spent among hand activity level(HAL) variables was 55% for HAL-cat2 (HAL: 3.3 - <6.7). The percent time of items with respect to both loads with more than 5kg and contact stress was less than 4%. Vibration was not exposed in the study workers. Different aspects were discussed for findings. The study results showed that wrist deviation was highest in percent time spent on awkward posture while HAL-cat2 was highest in hand repetition. The study suggests that distal upper extremity posture and HAL should be primarily addressed and controlled in non-routinized work including the hospital settings.