• Journal of the Korean Society for Precision Engineering
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• v.20 no.1
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• pp.26-35
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• 2003

• The Journal of Korean Physical Therapy
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• v.17 no.4
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• pp.601-612
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• 2005

본 연구는 복직근의 기능적 전기자극이 경직형 뇌성마비 아동의 1회 호흡용적과 폐활량 등의 호흡능력과 복직근의 근육활동에 미치는 영향을 알아보기 위해서 대구 시내 OO특수학교에 재학 중인 14세 이상 16세 미만의 경직형 사지 뇌성마비 아동 6명(남자 3, 여자 3)을 대상으로 하여 복직근에 1회 20분. 주 3회씩 총 6주간 기능적 전기자극을 적용하였다. 기능적 전기자극의 적용 6주 전과, 직전에 두 번의 사전 검사와 적용 후 사후 검사를 실시하였다. MP30(Biopack, USA)을 이용하여 폐활량과 예측치 폐활량 백분율, 1회 호흡용적을 검사하였으며 Table면전극 근전도(Noraxon, USA)를 이용하여 복직근의 근육 활동량을 측정하였다. 분석결과는 다음과 같다. 1. 복직근의 기능적 전기자극 적용 6주 전과 직전의 폐활량은 유의한 차이가 없었으나, 적용 후의 폐활량은 적용 전에 비해 유의한 증가를 나타내었다(p<0.05). 2. 복직근의 기능적 전기자극 적용 6주 전과 직전의 예측치 폐활량 백분율은 유의한 차이가 없었으나, 적용 후의 예측치 폐활량 백분율은 적용 전에 비해 유의한 증가를 나타내었다(p<0.05). 3. 복직근의 기능적 전기자극 적용 6주 전과 직전의 1회 호흡용적은 유의한 차이가 없었으나, 적용 후의 1회 호흡용적은 적용 전에 비해 유의한 증가를 나타내었다(p<0.05). 4. 복직근의 기능적 전기자극 적용 6주 전과 직전의 복직근의 활동 값은 유의한 차이가 없었으나 적용 후의 복직근의 활동 값은 적용 전에 비해 유의한 증가를 나타내었다(p<0.05). 이상의 결과를 종합해 볼 때 6주간의 복직근의 기능적 전기자극이 경직형 뇌성마비 아동에 있어서 복직근의 근력을 강화시킴으로써 폐활량과 1회 호흡 용적 등의 호흡능력을 향상시킴을 확인할 수 있었다.

• Journal of Biomedical Engineering Research
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• v.24 no.6 s.81
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• pp.523-531
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• 2003

We developed a PC-based 8-channel electrical stimulation system for transcutaneous functional electrical stimulation (FES), and applied it to FES exercise and paraplegic walking. The PC program consists of four parts: a database, a stimulation pattern generator, a stimulus parameter converter, and an exercise program. The stimulation pattern can be arbitrarily generated and edited by using the mouse on the PC screen, and the resulting stimulus parameters arc extracted from the recruitment curves, and transmitted to the 8-channel stimulator through the serial port. The stimulator has nine microprocessors: one master and eight slaves, Each channel is controlled by the slave microprocessor, and is operated independently. Clinical application of the system to a paraplegic patient showed significant increase in the knee extensor torque, the fatigue resistance, and the leg circumference, The patient can now walk about 50 meters for more than 2 minutes.

• The Journal of Korean Academy of Sensory Integration
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• v.14 no.2
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• pp.1-10
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• 2016

Objective: This study aims investigating the effects of functional electrical stimulation (FES) on hand function of children with spastic cerebral palsy. Methods: The participants of this study are 20 children with spastic cerebral palsy aged between 11 to 16 years old. All the subjects underwent 24 sessions of FES during 8 weeks. Each FES was 20 minutes per session, and 3 sessions of FES were provided in a week. Measurements used to assess hand function are Jebsen Hand Function Test, Modified Ashworth Scale and 3D Motion Analysis. After establishment of the baseline for each client by all the measurements, reevaluations were performed every 2 weeks using Jebsen Hand Function Test and the Modified Ashworth Scale. The 3D Motion Analysis was performed only before- and after the 8 weeks of FES treatment. Results: After the FES, there was significant decrease in completed time for the all 6 subtasks of Jebsen Hand Function Test were (p<.05) and also significant decrease in spasticity score of Modified Ashworth Scale as well (p<.05). 3D Motion Analysis showed that the hand tapping and the finger tapping has been significantly improved (p<.05), and the pronation-supination movement of lower arm has been significantly improved as well. Conclusion: Based on the results of this study, it is evidenced that functional electrical stimulation is effective treatment for hand function of children with cerebral palsy. For future research, it is recommended to examine various protocols of FES including impact of long-term application.

• Journal of rehabilitation welfare engineering & assistive technology
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• v.10 no.1
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• pp.59-64
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• 2016

In this study, the application was developed for the simulation of functional electrical stimulation. It functions to calculate the electrical energy which is transmitted to the patient, to visualize the electrical stimulation waveform, Therapy, Burst and Pulse section as setup of time period requested. The application was verified by comparing the oscilloscope and the graph of the application. XML schema was developed to utilize the contents of simulation which consist of the standard codes that are identified by OID. Using the application, medical experts will be able to research and share the contents of simulation.

• Journal of Biomedical Engineering Research
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• v.22 no.2
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• pp.151-156
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• 2001

A computer model of the musculoskelotal system that provides accurate prediction of muscle force and body movement trom the stimulation input is desired for the effective control system design in FES. This paper aims to investigate the fundamental properties of the gradual muscle force potentiation that was not included in the previous muscle models, for future development of a model that provides vetter prediction of FES-induced muscle force and body movement. Specifically, hou the muscle length was investigated. The experimental results showed that both the force increment ratio and the time-to-peak during electrical stimulation decreased with stimulatino frequency. When the muscle potentiation state was saturated by preceding stimulation. the force did not increase any more during additive stimulation. Muscle length significantly affected the force potentiation in such a way that the force increment ratio decreased with muscle length. A new model of the muscle potentiation based on these results is desired in the future.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.37 no.12
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• pp.1121-1127
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• 2013

This study deals with experimental studies on electromyogram (EMG) measurements and functional electrical stimulation (FES) for the rehabilitation of a shoulder-joint. Based on the structure, motion, and main functions of the musculoskeletal system in a shoulder-joint, the muscles playing a major role for the motion in the sagittal plane were selected for the experiment. First, the surface electromyogram of the main muscles was measured according to the joint angle. The results showed that the change in the surface EMG was linearly proportional to the change in the joint angle. Second, the joint angle was measured during FES at shoulder muscles. The results showed that the joint angle increased as the FES current increased in a certain range of FES. It was confirmed that the willingness of muscles to move could be detected by measuring EMG and that the generation of muscle tension could be assisted by FES for active rehabilitation.

• Journal of the Korean Society for Precision Engineering
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• v.19 no.4
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• pp.44-51
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• 2002

• Journal of the Korea Convergence Society
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• v.9 no.10
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• pp.109-120
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• 2018

The purpose of this study was to investigate the effects of functional electrical stimulation (FES) with mirror therapy on balance and gait ability in chronic stroke patients. Thirty-five subjects who met the inclusion criteria were randomly allocated into three groups: the functional electrical stimulation with mirror therapy group(FMT group, n=11), mirror therapy group(MT group, n=12), and control group (n=12). The exercises were conducted for 30 min per day, five, per week for four weeks. Balance and gait ability were examined at baseline and after 4 weeks of intervention. After training, the FMT group showed significant improvement in berg balance scale (BBS), center of pressure (COP) length, affected step length (ASL), Cadence and average gait speed (AGS) compared MT group and control group(p<0.05). This findings show that FES and MT convergence can be an effective intervention for stroke patients balance and gait ability. Continued development of convergence interventions for stroke patients with balance and gait ability in practice, are suggested.

• Proceedings of the Korea Information Processing Society Conference
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• 2020.05a
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• pp.476-479
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• 2020

본 논문은 전기 자극 장치에 관한 것으로서, 운동상황에 맞게 인공지능 기능이 음악을 선별해 주고 음악의 BPM(beats per minute)에 맞게 전기 자극 장치에서의 PWM(pulse width modulation)신호가 동기화 되어 재활 기능과 더불어 헬스 케어와 관련된 추가적인 기능 및 효과를 제공할 수 있는 개선된 전기 자극 장치에 관한 것이다. 언제 어디서나 간편하게 셀프 운동케어와 할 수 있도록 AR기술을 이용한 카메라가 있는 디지털 디바이스를 활용하며, 해당 신체의 운동부위를 지정하게 되면 이에 맞는 운동방법을 AI기술을 이용하여 적용할 수 있다. 수행자가 잘못 운동을 하는 것을 올바르게 개선시키기 위하여 실시간 AI 음성기능과 텍스트 코칭을 통해서 올바르게 운동할 수 있게 제안하며, 이에 대한 과정과 결과를 시각적으로 보여주면, 결과에 대해서는 리포팅을 하여 사용자가 올바르게 운동을 하고 효과적으로 운동을 했는지에 대해서 정량적인 수치의 운동횟수와 운동량에 대해서 표현해준다.