• Therapeutic Science for Rehabilitation
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• v.10 no.1
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• pp.129-140
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• 2021

Objective : This study evaluated the differences between the upper and lower arm activities of the affected and non-affected sides in stroke patients performing activities of daily living. It was intended to gather basic data for the measurement of daily activities. Methods : The participants in the study consisted of 20 patients, 10 had left hemiplegia and 10 had right hemiplegia. Between September and November 2017, they performed drinking and dressing as unimanual and bimanual tasks. The 3-axes accelerometers were placed 2cm below the lateral epicondyle on the upper arm and 2cm below the radial styloid on the lower arm. The data were collected at intervals of 1/32 Hz and analyzed. Results : In patients with right hemiplegia, the tendon activity was significantly higher in the lower arm when performing a bimanual activity (p<.05), for all the other activities, those of the lower arm were significantly higher than those of the upper arm (p<.01, p<.05). There was no significant difference between the unimanual and bimanual activities of the affected and tendon sides in patients with left hemiplegia (p>.05). In both hands, the activity of the lower arm was significantly higher than that of the activities of the upper and lower arms, except on the affected side (p<.05). In all patients, the activities of the upper and lower arms were significantly higher (p<.05), and the activity of the lower arm was significantly higher than that of the upper (p<.001, p<.05). Conclusion : The activity was higher on the non-affected side than the affected side during the dressing task, and the overall activity was higher in the lower arm than the upper arm.

• The Journal of the Korea Contents Association
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• v.15 no.3
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• pp.168-173
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• 2015

Use of forearm and hip joint bone density scan and find the clinical usefulness of the results that can be inferred as a result of any other region sites injured by a correction factor which if One part up. Groups of 60 patients, 10 patients by age 20-70 were composed of patients measured with the forearm and lumbar spine bone mineral density T-score and Z-score of the survey for each of the three factors that it was Find the correction factor to obtain the relationship. Bone mineral density of the correlation coefficient R = 0.8 correction factor is Y = 1.341X + 0.146. T-score of correlation coefficient R = 0.804 and the correction factor Y = 0.565X - 0.327 is Z-score of the correlation coefficient R = 0.637 correction factor Y = 0.539X - 0.225. It is regarded that there will be a clinical availability which can analogize the result of a part by using the result of the other part. It will be able to determine an auxiliary role in the clinical diagnosis. Correction factor to the equation Y = 1.341X + 0.146 is recommended.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.12 no.5
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• pp.475-481
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• 2019

A splint is one of assisting devices for the disabled with hemiplegia or contracture and is manually made by an experienced expert. Heated thermoplastic materials are continuously fitted to the affected part. This traditional method has a possible risk of low-temperature burn, quality variance of the splint due to the proficiency of maker. etc. While various approaches has been made using 3D printing technology in order to redeem those disadvantages, they still carry high cost issues with 3D scanners or accuracy issues with manual measurement. This research begins with symmetrical characteristics of human body and focuses on the preliminary study for the possibility of splint manufacturing with 3D printing technology based on geometric characteristics of unaffected arm. 3D right and left forearm models of healthy male adults were created by photogrammetry software and a series of digital images in order to measure the circumference and cross-sectional area of the forearm models at every 20mm from the elbow. The circumference and cross-sectional area showed tolerable levels of differences between both sides within subjects; The circumference and cross-sectional area showed very strong correlations between both sides within subjects. From these findings, the possibility of splint manufacturing with 3D printing technology could be confirmed based on the geometric characteristics of unaffected side.

• 재활복지
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• v.22 no.2
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• pp.161-174
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• 2018

The purpose of this study was to investigate the effect of a task oriented circuit exercise in upper extremity function and self-efficacy in stroke patients. An experimental group of 14 patients was assigned to conduct a task oriented circuit exercise and the general task oriented exercise a control group of 14 patients was randomly assigned to exercise for 30 minutes 5 times every week during 4 weeks. Fugl-Meyer Assessment and Self-Efficacy Scale were evaluated to compare the upper extremity function and self-efficacy before and after the exercise. The result of this study were as follows : First, after the Task oriented circuit exercise, the upper extremity function and Self-Efficacy showed statistical significant difference between pre and post test. Second, after the general task oriented exercise, the upper extremity function showed statistical significant difference between pre and post test. But not much in Self-Efficacy. The comparison result between experimental group and control group in presented statistically significant differences where the upper extremity function. But, presented not statistically significant differences where Self-Efficacy Scale.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.19 no.8
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• pp.260-267
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• 2018

Surface electromyography (sEMG) is mainly used as an on/off switch in the early stage of the study and was then expanded to navigational control of powered-wheelchairs and recognition of sign language or finger gestures. There are difficulties in communication between people who know and do not know sign language; therefore, many efforts have been made to recognize sign language or finger gestures. Recently, use of sEMG signals to recognize sign language signals have been investigated; however, most studies of this topic conducted to date have focused on Chinese finger number gestures. Since sign language and finger gestures vary among regions, Korean- and Chinese-finger number gestures differ from each other. Accordingly, the recognition performance of Korean finger number gestures based on sEMG signals can be severely degraded if the same muscles are specified as for Chinese finger number gestures. However, few studies of Korean finger number gestures based on sEMG signals have been conducted. Thus, this study was conducted to identify potential forearm muscles from which to collect sEMG signals for Korean finger number gestures. To accomplish this, six Korean finger number gestures from number zero to five were investigated to determine the usefulness of the proposed muscles and electrode placements by showing that CNN technique based on sEMG signal after sufficient learning recognizes six Korean finger number gestures in accuracy of 100%.

• The Journal of the Convergence on Culture Technology
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• v.6 no.1
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• pp.1-6
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• 2020

This study is about the safe arm posture in case of emergency escape using the vertical dive rescue sack at the fire site. The experimental results are as follows. First, the arms extended upward contact with the endothelium and narrowing part of the rescue sack minimized the scratches did not occur. Second, the bent position with both arms open was subject to light abrasions of on the elbows due to friction between the elbows and the scapula and the endothelium. Third, in the posture where both arms were gathered in the chest, the body passed through the narrowing part and friction between the bag's narrowing part, All subjects had light abrasions on their elbows. Fourth, because the arms are lowered, the legs are extended to the width of the shoulders when descending, so that the back of the hand has friction with the narrowing part of the bag and the endothelial skin. Finally, posture with both arms below the front increased the volume of the front of the body, resulting in a slight back injury. As a future research task, it is necessary to study the proper posture of legs and the posture of landing on the ground.

• Journal of the Korean Society of Radiology
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• v.17 no.4
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• pp.607-614
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• 2023

Clear overlapping of the bilateral epicondyle and proper separation of the elbow joint are crucial for obtaining accurate lateral general radiographs of the elbow. However, due to the complex anatomical structure of the elbow, achieving optimal positioning is challenging, leading to the need for repeated x-ray examinations. Therefore, the purpose of this study was to investigate the angle of the forearm in patients where accurate lateral images of the elbow joint can't be obtained after vertical incidence using a styrofoam device during elbow joint lateral x-ray imaging. Twenty patients were enrolled in our study following the established protocol. First, a vertical x-ray at an angle of 0° between the forearm and the table was taken (control group). Here, if the lateral image of the elbow joint was deemed inadequate, the forearm angle was adjusted using custom-made styrofoam supports with 5° and 10° inclinations (experimental groups). For the evaluation method, two assessors utilized a 5-point Likert scale to assess the images. The reliability of the assessments was analyzed using Cronbach's alpha coefficient. As a result, patients with inadequate overlap of the bilateral epicondyle and separation of the elbow joint in the initial examination (control group) were able to obtain the best images when setting a 10° angle between the forearm and the table. The subjective evaluation was 1.6 ± 0.8 points at 0°, 2.7 ± 0.8 points at 5°, and 4.4 ± 1.3 points at 10°, respectively. The reliability analysis for the angles of 0°, 5°, and 10° yielded Cronbach's alpha values of 0.867, 0.697, and 0.922, respectively. In conclusion, when it is not possible to obtain accurate images using the conventional position and X-ray beam direction, it is considered that by initially acquiring images with an angle of 10° between the forearm and the table, and gradually decreasing the angle while obtaining images, it would be possible to achieve the optimal image while reducing the number of repeat examinations.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.11a
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• pp.251-253
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• 2009

본 연구에서는 팔의 굽힘(flexion)과 폄(extension)운동 시 물체의 무게에 따른 저크의 변화를 통해 부드러움을 정량화하고, 물체무게와 움직임의 형태(type)에 따른 동작의 부드러움을 비교하고자 한다. 10 명의 오른손잡이 남자 대학생(평균 $24.8{\pm}1.1$ 세)을 실험 참여자로 선정하였다. 물체무게(0g, 1000g)와 움직임의 형태(손등 위/아래)를 달리하여 팔의 굽힘과 폄 운동을 실시하였다. 또한 3 축 가속도 센서를 이용하여 x 와 z 축의 가속도를 측정하였고, 측정된 신호로 부터 저크값을 추출 하였다. 실험은 총 8 분으로 4 개의 block 으로 구성되며 각 block 은 resting 구간 1 분과 lifting 구간 1 분으로 구성된다. 실험 결과 물체무게 0g 에 비해 1000g 에서 가속도와 정규저크 값이 유의미하게 감소하였다.

• Annals of Clinical Neurophysiology
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• v.3 no.1
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• pp.47-49
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• 2001

Lateral antabrachial cutaneous neuropathy(LACN) was diagnosed in a 42-year-old woman who developed pain and paresthesia in the left forearm after several days of heavy labor. The symptoms were resolved with conservative treatment, including cessation of heavy labor and a brief course of oral corticosteroids. But the symptoms recurred after 9 months. Those were also resolved with same treatment as the first attack. LACN is important to recognize because the symptoms may mimic the pathology of a cervical root, the brachial plexus, the radial and median nerves at the level of the elbow, and a focal idiopathic inflammatory neuritis.

• 한국HCI학회:학술대회논문집
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• 2007.02a
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• pp.222-227
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• 2007

본 논문에서는 지체장애인들이 유효한 말초신경신호를 이용하여 컴퓨터를 사용할 수 있는 인터페이스를 개발하였다. 손목의 움직임을 통해 아래팔 4부분으로부터 근전도 (electromyogram, EMG) 신호를 추출하였고, 다층 인식 신경망을 사용하여 사용자의 의도를 추출하였다. 이를 통하여 마우스 커서의 움직임을 제어하고, 마우스 버튼을 클릭하는 동작을 할 수 있으며, 시각 디스플레이 장치에 표시된 핸드폰 자판과 같은 유저 인터페이스를 통해 컴퓨터에 글자를 입력할 수 있게 하였다. 추가적으로 Fitts' law를 사용하여 본 인터페이스의 사용성을 평가하였고, 이를 기존연구와 비교함으로써 본 인터페이스의 효용성을 검증하였다.