• Archives of Reconstructive Microsurgery
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• 제13권2호
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• pp.117-122
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• 2004

Purpose : The aim of this study was to evaluate the efficacy of arterialized venous flap in finger flexion contracture correction. Materials and methods : From 2002 to 2004, we have performed 10 arteriaized venous flap for treatment of severe flexion contracture in digit. The duration of flexion contracture was from 1 year to 50 years. The cause of contracture were bum scar(7 cases), postoperative contracture(2 cases) and other(l case). We evaluated the survival of flap, flap size, recovery of flexion contracture and subjective satisfaction. Results : All arterialized venous flap survived. The marginal minimal skin necrosis developed in 2 cases. The flap size was average $5.2{\times}3.5cm$. The recovery of flexion contracture was 87% compared with non affected side. 9 patients(90%) satisfied the results of operation. Conclusion : Arterialized venous flap is one of the useful procedure in treatment of finger flexion contracture because it has many advantages such as thin and good quality, variable length of pedicle, preservation of major vascular pedicle, less operation time and in addition possibility of various modifications.

• 제어로봇시스템학회논문지
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• 제18권2호
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• pp.69-75
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• 2012

This paper proposes a biomimetic finger module to be used in a lightweight hand prosthesis. The finger module consists of finger skeleton and an actuator module driven by SMA (Shape Memory Alloy). The prototype finger module can perform flexion and extension motions; finger flexion is driven by a contraction force of SMA, but it is extended by an elastic force of an extension spring inserted into the finger skeleton. The finger motions are controlled by feedback of electric resistance of SMA because the finger module has no sensors to measure length and angle. Total weight of a prototype finger module is 30g. In experiments the finger motions and finger grip force are tested and compared with simulation results when a constant contraction force of SMA is given. The experimental results show that the proposed SMA-driven finger module is feasible to the lightweight hand prosthesis.

• Clinical Pain
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• 제19권2호
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• pp.124-128
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• 2020

Motor paralysis is a less common neurologic complication of herpes zoster. Until now, a few cases have been reported, and most of these cases showed brachial plexopathy involving one or two segments. We report a patient with pain and weakness on upper extremity diagnosed as brachial plexopathy after herpes zoster infection. An 88-year-old female patient complained not only tingling sense, pain, and swelling on right whole arm, but also weakness on this right upper extremity. On physical examination, weakness is seen in right shoulder abduction·shoulder flexion·elbow flexion·elbow extension· wrist extension (grade 4), finger flexion·finger abduction·finger extension·finger DIP flexion (grade 3). In electrodiagnostic study and magnetic resonance imaging study, she was diagnosed as the brachial plexopathy, whole branch involved. This is the only case of post-herpetic brachial plexopathy involving whole branch in domestic.

• Journal of Acupuncture Research
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• 제33권2호
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• pp.173-180
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• 2016

Objectives : To treat the progression of fibroproliferative disease that affects the flexion contracture of the fingers for patients with Dupuytren's contracture, the purpose of this study is to report a case of a patient with Dupuytren's contracture after complex Korean medical treatment. Methods : A patient was treated with acupuncture, moxibustion and bee venom pharmacopuncture on their left palmar aponeurosis. Six rounds of acupuncture and moxibustion were administered from November 30, 2015 through to January 2, 2016. Three rounds of bee venom pharmacopuncture was administered from December 14, 2015 through to January 2, 2016. The degree of flexion contracture and the Tubiana's stage were measured to evaluate the clinical improvement. Results : After 30 treatment sessions the flexion contracture degrees of the 4th finger's metacarpophalangeal joint and proximal interphalangeal joint improved as much as $25^{\circ}$, $15^{\circ}$, respectively. And the flexion contracture degrees of the 5th finger's metacarpophalangeal joint, proximal interphalangeal joint and distal interphalangeal joint improved as much as $15^{\circ}$, $10^{\circ}$, $5^{\circ}$, respectively. The Tubiana's stage of each finger decreased from 4 to 3. Conclusion : This study suggests that acupuncture, moxibustion and bee venom pharmacopuncture could be effective for patients with Dupuytren's contracture.

• Journal of Magnetics
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• 제22권1호
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• pp.155-161
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• 2017

This paper presents a new nonmechanical rehabilitation system driven by magnetic force. Typically, finger rehabilitation mechanisms are complex mechanical systems. The proposed method allows wireless operation, a simple configuration, and easy installation on the hand for active actuation by magnetic force. The system consists of a driving coil, driving magnets (M1), and auxiliary magnets (M2 and M3), respectively, at the finger, palm, and the center of coil. The magnets and the driving coil produce three magnetic forces for an active motions of the finger. During active actuations, magnetic attractive forces between M1 and M2 or between M1 and M3 enhance the flexion/extension motions. The proposed system simply improves the extension motion of the finger using a magnetic system. In this system, the maximum force and angular variation of the extension motion were 0.438 N and $49^{\circ}$, respectively. We analyzed the magnetic interaction in the system and verified finger's active actuation.

• 대한인간공학회:학술대회논문집
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• 대한인간공학회 1992년도 추계학술대회논문집
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• pp.46-53
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• 1992

Finger movements in the sagittal plane mainly consist of flexion and extension about the metacarpophalangeal(MCP) and proximal interphalangeal(PIP) joints. A kinematic finger model was developed with the assumption of constant tendon moment arms. Equations of static equilibrium were derived for the finger model using the principle of virtual work. Equations of static equilibrium for the finger model were indeterminate since only three equations were available for five unknown variables(forces). The number of variables was reduced based on information on muscular activities in finger movements. Then the amounts of forces which muscles exerted to maintain static equilibrium against external loads were computed from the equilibrium equations. The muscular forces were expressed mathematically as functions of finger positions, tendon moment arms, lengths of phalanges, and the magnitude and direction of external load. The external finger strength were computed using the equations of muscular forces and anatomical data. Experiments were performed to measure finger strengths. Measurements were taken in combinations of four finger positions and four directions of force exertions. Validation of the finger models and of procedure to estimate finger strengths was done by comparing the results of computations and experiments. Significang differences were found between the predicted and measured finger strengths. However, the trends of finger strengths with respect to finger positions were similar inboth the predicted and measured. These findings indicate that the finger model and the procedure to predict finger strengths were correctly developed.

• 한국콘텐츠학회논문지
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• 제9권9호
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• pp.243-248
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• 2009

요통을 주소로 내원한 환자 74명(실험군 37명, 대조군 37명)을 대상으로 추나요법 중 점혈법이 요통환자의 통증감소에 미치는 효과를 알아보기 위하여 시각적 상사척도(VAS)의 도구를 이용하여 전방굴곡, 전방굴곡 후 신전, 좌 우 측방굴곡시 각각의 통증정도를 측정하여 대조군(근피신경전기자극군)과 비교 실험하였다. 수집된 자료는 SPSS WIN 12.0 프로그램으로 이용하여 ANCOVA 검정을 하였다(p<0.05). 통증정도(VAS)는 실험군이 대조군 보다 실험 전 후 감소 정도가 통계적으로 유의한 차이가 있는 것으로 나타났다(p<0.05). 실험군에서의 점혈법 실시 전 후 요통정도를 비교한 결과 전방굴곡에서는 실험군이 1.92정도 통증이 감소하였고, 전방굴곡 후 신전에서는 실험군이 2.22정도 통증이 감소하였으며, 우측굴곡에서는 실험군에서 1.23정도 감소하였고, 좌측굴곡에서는 실험군이 1.21정도 통증이 감소함을 보였다. 즉, 사전 통증정도를 모두 같게 고정을 한 후에 점혈법을 받은 실험군은 근피신경전기자극을 받은 대조군보다 통증정도가 유의하게 감소하였다.

• 로봇학회논문지
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• 제11권4호
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• pp.193-204
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• 2016

This paper presents an anthropomorphic finger prosthesis for amputees whose proximal phalanx is mutilated. The finger prosthesis to be proposed is able to make the amputees to perform the natural motion such as flexion/extension as well as self-adaptive grasping motion as if normal human finger does. The mechanism of finger prosthesis with three degrees-of-freedom (DOFs) consists of two five-bar and one four-bar linkages. Two passive components composed of torsional spring and mechanical stopper and only one active joint are employed in order to realize an underactuation. Each passive component is installed into the five-bar linkage. In order to activate the finger prosthesis, it is required for the user to flex and extend the remaining proximal phalanx on the metacarpophalangeal (MCP) joint, not an electric motor. Thus the finger prosthesis conducts not only the natural motion according to his/her intention but also the grasping motion through the deformation of springs by the object for human finger-like behavior. In order to reveal the operation principle of the proposed mechanism, kinematic analysis is performed for the linkage design. Finally both simulations and experiments are conducted in order to reveal the design feasibility of the proposed finger mechanism.

• 전자공학회논문지SC
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• 제46권6호
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• pp.38-43
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• 2009

표면 근전도 신호를 이용하여 손가락의 굽힘 동작을 추론하는 방법을 제안한다. 표면 근전도 신호는 인체 근육의 표면에서 무해하고 손쉽게 취득되나, 전극이 근육 내부에 침투하는 침습식 근전도와는 달리 특정 근육의 활동만을 반영하지 않는다. 따라서 소수의 전극을 사용하는 표면 근전도 신호로 다양한 신체 동작을 구분하기는 쉽지 않다. 본 연구에서는 전완 둘레에 부착된 4채널 근전도 센서를 사용하여 신호를 취득하였고, 구분을 위하여 사용한 동작은 엄지, 검지, 중지, 약지, 소지의 개별 손가락의 굽힘 동작이다. 피검자 한 명은 숙련자였으며, 다른 한 명은 비숙련자였다. 근전도 신호의 특성으로 정보 엔트로피를 추출하였으며 최대우도추정법을 사용하여 실제 동작을 추정하였다. 실험 결과 평균 95% 이상의 성능을 보였으며, 제안하는 방법이 손가락 동작의 구분에 유용함을 확인하였다.

• 대한한방내과학회지
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• 제13권2호
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• pp.100-110
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• 1992

For an effective acupuncture treatment, the location of muscles around Sutaeumkyongkun and Suyangmyongkyongkun were researched and they were made contracted. The conclusion is as follows; 1. The contraction of muscles around Sutaeumkyongkun gives appearance of the postures ; free movement of thumb, abduction of extension of wrist, flexion and pronation of elbow, depression and abduction of girdle of superior limb, flexion, internal rotation and horizontal flexion of shoulder joint These postures all together consequently produces the action 'holding something in arms'. 2. The contraction of muscles around Suyangmyongkyongkun gives appearance of the postures; extension of metacarpophalangeal and interphalangeal joint of index finger extension and abduction of thumb, extension of wrist, extension and supination of elbow, adduction, elevation and upward rotation of girdle of superior limb, extension, abduction, adduction, internal rotation, external rotation, horizontal extension of shoulder joint, flexion and opposite rotation of neck. These postures all together consequently produces the action 'raising arms'.