• 재활복지공학회논문지
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• 제6권1호
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• pp.67-73
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• 2012

본 논문에서는 표면 근전도 신호를 사용하여 손목 움직임의 동작을 분류하기 위해 인공 신경 회로망(ANN : Artificial Neural Network)기반의 동작 분류 알고리즘을 제안한다. 손목 움직임에 무리가 없는 20~30대 성인 26명을 대상으로 척측 수근 굴근과 척측 수근 신근에 부착한 2채널의 전극으로부터 표면 근전도 신호를 취득하고, 취득한 근전도로부터 손목의 굴곡, 신전, 내전, 외전, 휴식 다섯 동작을 인식한다. 빠른 처리 속도를 위해 획득한 신호로부터 시간 영역에서의 특징점을 추출하고 ANN을 이용한 동작 분류에 사용된다. 특징점으로 DAMV, DASDV, MAV, RMS를 사용하였으며, ANN 기반의 동작 분류의 인식율은 DAMV는 98.03%, DASDV는 97.97%, MAV는 96.95%, 그리고 RMS는 96.82%의 정확도를 나타낸다.

• Korean Journal of Acupuncture
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• 제35권4호
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• pp.234-238
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• 2018

Objectives : This report details on a single case of Korean Medical treatments for the angular deformity of wrist fracture with disuse osteopenia. Methods : A 74-year-old lady with angular deformity of wrist fracture with disuse osteopenia was treated by Korean Medical therapies including manual acupuncture with electroacupuncture, pharmacopuncture, and chuna, twice daily for 41 days. Visual analogue scale for pain and range of motion were evaluated. Results : 1. Wrist pain decreased by Korean medical treatments over 41 days. 2. As a result of evaluation by visual analogue scale, the score marked from 6 to 3. 3. ROM of wrist joint increased from $0^{\circ}$ to $10^{\circ}$. Conclusions : Korean medical treatments helped symptom improvement in a patient with angular deformity of wrist fracture with disuse osteopenia.

• Archives of Plastic Surgery
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• 제49권6호
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• pp.750-754
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• 2022

Trigger wrist, characterized by a clicking or snapping sensation around the wrist joint during finger or wrist motion, and bifid or trifid median nerve, which occurs in carpal tunnel syndrome along with anatomical variation of median nerve, are rare conditions. We report the case of a patient with a thickened tendon caused by severe tenosynovitis and flexor tendon subluxation to the hamate hook due to bowing of the flexor retinaculum, thereby resulting in trigger wrist as well as an anatomical median nerve variation (bifid median nerve in the right wrist and trifid median nerve in the left wrist). A 59-year-old housewife visited our hospital with bilateral fingertip numbness, tingling sensation, and aggravated severe night cramping that began 2 months ago. She also complained about trigger wrist during small finger flexion. Based on magnetic resonance imaging, ultrasonography, and nerve conduction study, trifid median nerve and bilateral severe median nerve neuropathy of the wrist were diagnosed; therefore, transverse carpal tunnel release and exploration under wide-awake anesthesia were planned. Intraoperative findings showed trifid and bifid median nerves in left and right wrists, respectively. Additionally, bowing of flexor retinaculum and severe flexor tendon tenosynovitis were observed. Tenosynovitis with thickened flexor sheath resulted in subluxation of the small finger flexor tendon above the hamate hook. After transverse carpal ligament release with antebrachial fascia release and tenosynovectomy, subluxation of the flexor tendon was resolved. At 6 months postoperatively, the tingling and dullness in fingertips also resolved, and no trigger wrist or any other complications were noted.

• 대한의용생체공학회:의공학회지
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• 제33권2호
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• pp.65-71
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• 2012

In this paper, the Gaussian Mixture Model(GMM) which is very robust modeling for pattern classification is proposed to classify wrist motions using surface electromyograms(EMG). EMG is widely used to recognize wrist motions such as up, down, left, right, rest, and is obtained from two electrodes placed on the flexor carpi ulnaris and extensor carpi ulnaris of 15 subjects under no strain condition during wrist motions. Also, EMG-based feature is derived from extracted EMG signals in time domain for fast processing. The estimated features based in difference absolute mean value(DAMV) are used for motion classification through GMM. The performance of our approach is evaluated by recognition rates and it is found that the proposed GMM-based method yields better results than conventional schemes including k-Nearest Neighbor(k-NN), Quadratic Discriminant Analysis(QDA) and Linear Discriminant Analysis(LDA).

• 임상간호연구
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• 제17권1호
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• pp.90-100
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• 2011

Purpose: This paper was to develop an elbow restraint which can reduce the side effects of the wrist restraint which was frequently used in an intensive care unit and to evaluate its application. Methods: A nonequivalent control group non-synchronized design was used. Subjects were 38 patients (elbow restraint group: 18, wrist restraint group: 20) and 20 nurses who used both restraints in medical intensive care unit at G National University Hospital. Restraints were applied to subjects for 72 hours. Data were collected from December 1, 2009 through March 31, 2010. The data collected were analyzed using $x^2-test$, Fisher's exact test, t-test, and ANCOVA using SPSS 12.0 program. Results: Elbow restraint significantly decreased range of wrist motion reduction, swelling and significantly increased the convenience of wearing restraint compared to wrist restraint. Conclusion: The new elbow restraint are more efficient than the old wrist restraint, which have been used in an intensive care unit, in terms of convenience of restraint application, range of joint motion and prevention of swelling.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2004년도 추계학술대회 논문집
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• pp.1303-1306
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• 2004

We developed a symmetrical upper limb motion trainer for chronic hemiparetic subjects. This trainer enabled the practice of a forearm pronatio $n^ination and wrist flexion/extension. In this study, we have used functional magnetic resonance imaging(fMRI) with the developed symmetrical upper limb motion device, to compare brain activation patterns elicited by flexion/extension wrist movements of control and hemiparetic subject group. In control group, contralateral somatosensory cortex(SMC) and bilateral cerebellum were activated by dominant hand movement(Task 1), while bilateral movements by dominant hand(Task 2) activated the SMC in both cerebral hemispheres and ipsilateral cerebellum. However, in hemiparetic subject group, contralateral supplymentary motor area(SMA) was activated by unaffected hand movement(Task 1), while the activation of bilateral movements by unaffected hand(Task 2) showed only SMA in the undamaged hemisphere. This study, demonstrating the ability to accurately measure activation in both sensory and motor cortex, is currently being extended to patients in clinical applications such as the recovery of motor function after stroke.ke.

• 한국운동역학회지
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• 제17권1호
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• pp.29-39
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• 2007

This study were obtained elapsed time phase-by-phases, displacement, user angle, velocity and angular velocity to analyse kinematically contributing factors at impact of forehand drive motion, on targeting three male players. The results of the study were presented as follows; In the forehand drive swing, the elapsed time by phases was a total of .52 seconds: .30 seconds from backswing to impact and .22 seconds from impact to follow-through, Considering the mean change in locations of COM of each(part$\rightarrow$body segment) at impact, racket head, left shoulder, right wrist and left hip, the left-right directions(X-axis) were showm to be each $.61{\pm}.03$, $1.19{\pm}.08$, $.66{\pm}.03$, $.94{\pm}.06$, and $.45{\pm}.03m$. The displacement differences of COM of each body segment were shown to be -.57, -.05, -.33, and .16m. For the vertical direction(Z-axis), the center of mass was lowest at impact and highest at E3. For the displacement of the right wrist on the left hip, the right wrist moved to .82m to the lower direction without change in the locations of the hip from E1 from E2. When the left hip moved .02m from E2 to E3, the right wrist moved .7m in the upper direction. In respect to the velocity of each body segment, the hip and the shoulder joint accelerated and then the wrist followed. Then the right wrists of all the subjects and their racket heads showed maximum speed, and an effective swing was observed. At the angle of each part, the angle of the right wrist was the smallest at the backswing and the largest at the moment of the impact. Then it increased gradually in the follow-through section. In respect of angular velocity for subject A, the hip moved and the largest change occurred. Immediately before the impact, the subject made a swing using his right wrist, his hip, and the shoulder joint, showing the maximum value, which was judged to be effective.

• 대한물리의학회지
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• 제15권3호
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• pp.79-87
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• 2020

PURPOSE: Physical therapists are always exposed to work-related musculoskeletal disorders. Although kinesio taping can support the joints and assist movement, studies of the effects of kinesio taping on these physical therapists are lacking. This study examined the effects of Kinesio-taping on pain, grip strength, range of motion and daily living skills in physical therapists with work-related musculoskeletal disorders. Pain was measured using a 100 mm VAS. The grip strength was measured using a handgrip dynamometer. The range of joint motion was measured using a goniometer. Living skills were measured by patient-rated wrist evaluation. METHODS: Twenty physical therapists with wrist pain (Kinesio taping: n = 10, Sham taping: n = 10) received taping for each group, and measured the pain, grip strength, range of motion and daily living skills before (Baseline) and after taping (Nine hours). RESULTS: All data were analyzed using Repeated Measure ANOVA (p < .05). In the Kinesio group, resting pain (-14.9), movement pain (-20.5), and daily living skills (-9.55) were improved significantly compared to the baseline (p < .05). The grip strength and range of motion were not changed (p > .05). The sham group showed no significant change in all variables (p > .05). CONCLUSION: Physical therapists with work-related musculoskeletal disorders of the wrist should apply kinesiotaping to improve the occupational tasks.

• 재활치료과학
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• 제12권1호
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• pp.79-92
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• 2023

목적 : 본 연구는 손목과 손가락 관절가동범위 측정에 대한 3차원 동작분석 프로그램의 신뢰도를 알아보고자 하였다. 연구방법 : 연구 대상자는 정상인으로 손목과 손가락의 움직임에 제한이 없는 자, 본 연구의 목적을 이해하고 참여에 동의한 자 50명을 대상으로 하였다. 측각기와 3차원 동작분석 프로그램을 사용하여 총 11항목의 손목과 손가락 관절가동범위를 각각 1회씩 측정하였다. 3차원 동작분석 프로그램의 신뢰도를 측정하기 위해 측정값의 일치도와 불일치 양상을 비교하였다. 결과 : 측정값의 일치도를 분석한 결과 44개의 항목 중 38개 측정항목에서 매우 높은 일치도를 보였으며, 측정값의 불일치 양상을 분석한 결과 3가지 항목에서 불일치 양상이 나타났다. 결론 : 본 연구 결과를 통해 본 연구에서 사용한 3차원 동작분석 프로그램을 통해 관절가동범위 측정이 가능함을 알 수 있었다. 또한 3차원 동작분석 프로그램의 측정의 편리성, 정확성의 장점을 기반으로 다양한 임상 분야에서 활용되기를 기대한다.

• 한국운동역학회지
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• 제31권1호
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• pp.50-58
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• 2021

Objective: This study aimed to determine the effect of wrist and trunk weight loading using sandbags in stroke patients in order to provide the quantitative data for enhancement of gait movement. Method: Twelve stroke patients, who have been diagnosed with hemiplegia over a year ago, were participated in this study. All subjects were asked to perform normal walking [N], wrist sandbag walking [W], wrist & trunk sandbag walking [WT], and both wrist sandbag walking [B] and both wrist & trunk sandbag walking [BT], respectively. Eight infrared cameras were used to collect the raw data. Gait parameters, arm swing, shoulder-pelvic kinematics, and lower extremity joint angle were calculated to examine the differences during walking. Results: As a result, there were no significant differences in the gait parameters, shoulder-pelvis, and lower extremities joint angles, but significant differences were found in the range of motion and the anteversion in arm swing. Conclusion: Wrist and trunk weight loading using sandbags affected the movement of the upper extremities only while it did not affect the movement of the lower extremities. It implies that it can reduce the risk of falling caused by a sudden movement change in lower extremities. In addition, the wrist and trunk weight loading using sandbags can induce changes in movement of the upper extremities independently and contribute to functional rehabilitation through resistance training.