• 대한전기학회논문지:시스템및제어부문D
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• 제55권5호
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• pp.248-253
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• 2006

The purpose of this study is to develop a portable gait-event detection system which is necessary for the cycle-to-cycle FES(functional electrical stimulation) control of locomotion. To make the system portable, we made following modifications in the gait signal measurement system. That is, 1) to make the system wireless using Bluetooth communication, 2) to make the system small-sized and battery-powered by using low power consumption ${\mu}$ P(ATmega8535L). The gait-events were analyzed in off-line at the main computer using ANN(Artificial Neural Network). The Proposed system showed no mis-detection of the gait-events of normal subject and hemiplegia subjects. The performance of the system was better than the previous wired-system.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 추계학술대회 논문집 전기물성,응용부문
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• pp.10-11
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• 2006

The azobenzene dendrimer is one of the dendrimeric macromolecules that include the azo-group exhibiting a photochromic character. Due to the presence of the charge transfer element of the azo-group and its rod-shaped structure, these compounds are expected to have potential interest in electronics and photoelectronics, especially in nonlinear optics. In the present paper, we give pressure stimulation to organic thin films and detect the induced displacement current. Functional photoisometrization organic molecular the photo-stimulus to organic monomolecular L films and LB films of dendrimer and SASH were performed. The SASH organic monolayer in case of pressure stimulus occurred that positive course but in case of the photo-stimulus compared positive and negative. It is assumed that generation forms of displacement current were measured when photo-stimulus for impression.

• 셀메드
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• 제2권1호
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• pp.10.1-10.6
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• 2012

Acupuncture works by stimulating peripheral sensory nerves and their endings causing an increase in cutaneous blood flow and microcirculation, as well as release of neurotransmitters, neuropeptides, and hormones. SP6 Patch is a nanoscale nontransdermal device that mildly stimulates Stomach 36 (zusanli) and other acupuncture points. As stimulation of these points has been indicated to have an effect on hypothalamic function, it is of great research interest to investigate the effect of SP6 Patch on the physiology of organs that are affected by hypothalamic regulation. Bioelectrical tissue impedance data indicative of cellular physiologic organ function, using an Electro Interstitial Scan (EIS) system, were acquired from hypothalamus, pancreas, liver, intestines, kidneys, thyroid and adrenal glands in 10 (1 male, 9 females) volunteers while wearing the SP6 Patch daily for 1 week. EIS testing was performed at baseline with no patch, 30 min after wearing the patch, and after wearing the patch 12 h/day for 1 week. Subjects were instructed to keep well hydrated during the study period. All subjects served as their own control. The hypothesis was: The SP6 Patch worn 12 h/day on the Stomach 36 acupuncture point for 1 week, may significantly improve cellular physiologic functional status of different organs measured by EIS. All tested organs achieved significant improvement in their functional physiologic status after wearing the SP6 Pach 12 h/day for 1 week compared to baseline with an overall average statistical power > 89%. Based upon these results the hypothesis was accepted as true.

• The Journal of Korean Physical Therapy
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• 제16권4호
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• pp.59-79
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• 2004

The purpose of this study was to determined the effects of reciprocal inhibition on spatial-temporal gait parameters in spastic hemiplegic patients through GaitRite system. The subjects were consisted 45 patients who had spastic hemiplegia due to stroke. All subjects randomly assigned to 3 group : manual reciprocal inhibition program group(manual group), neuromuscular electrical stimulation group(NMES group) and control group. The manual group received voluntary isometric contraction of pre-tibia muscle. The NMES group received neuromuscular electrical stimulation on tibialis anterior. The control group was not recieved any therapeutic intervention. Before and after experiments, spatial-temporal gait parameters and functional ambulatory profile was measure in all patients. The data of 30 patients who complete experimental course were statistically analysed. The results of this study were as following : 1. The percentage of change of functional ambulatory profile were markedly increased in manual group but statistically non significant(p>.01). 2. The percentage of change of gait velocity and cadence were markedly increased in manual group but statistically non significant(p>.01). 3. Asymmetry ratio of gait elements were more improved in manual group but statistically non significant(p>.01). 4. There were no statistical difference between pre-test and post-test with functional ambulatory profile, gait velocity, cadence and asymmetry ratios in NMES group(p>.01). 5. There were no statistical difference between pre-test and post-test with unctional ambulatory profile, gait velocity, cadence and asymmetry ratios in control group(p>.01). In conclusion, the present results revealed that reciprocal inhibition which produced by voluntary isometric contraction of pre-tibia muscle can be improved spatial-temporal gait parameters including functional ambulatory profile in hemiplegic patients. Therefore, reciprocal inhibition is useful to improve functional activities in hemiplegic patient. Further study should be done to analyze the effects of intervention duration of reciprocal inhibition, appropriate muscle contraction, optimal time to apply the reciprocal inhibition in more long period.

• The Korean Journal of Physiology
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• 제30권2호
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• pp.289-297
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• 1996

Excitatory amino acids (EAA) are thought to play an important role in producing cell death associated with ischemic and traumatic spinal cord injury. The present study was carried out to determine if the response characteristics of spinal sensory neurons in segments adjacent to degeneration sites induced by EAA are altered following these morphological changes. Intraspinal injections of quisqualic acid (QA) produced neuronal degeneration and spinal cavitation of gray matter. The severity of lesions was significantly attenuated by pretreatment with a non-NMDA antagonist NBQX. In extracellular single unit recordings, dorsal horn neurons in QA injected animal showed the increased mechanosensitivity, which included a shift to the left in the stimulus-response relationship, an increased background activity and an increase in the duration of after-discharge responses. Neuronal responses, especially the C-fiber response, to suprathreshold electrical stimulation of sciatic nerve also increased in most cases. These results suggest that altered functional states of neurons may be responsible for sensory abnormalities, e.g. allodynia and hyperalgesia, associated with syringomyolia and spinal cord injury.

• 한국융합학회논문지
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• 제8권1호
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• pp.77-87
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• 2017

본 연구는 앞십자인대 재건술 환자를 대상으로 융복합기반 러시안전류와 경피신경전기자극을 적용하였을 때 통증, 근력 및 기능에 미치는 영향을 비교하고자 하였다. 본 연구는 앞십자인대 재건술 환자 40명(러시안전류 적용군 20명, 경피신경전기자극 적용군 20명)을 대상으로 실시하였다. 두 군은 1회 20분, 주5회 4주 동안 각각의 전기중재를 실시하였고, 냉치료와 기기를 사용한 연속수동관절가동운동을 무릎관절주변에 각각 20분간 실시하였다. 치료적 중재의 영향을 알아보기 위하여, 본 연구는 중재 전후에 시각적 상사척도, 무릎 굽힘 및 폄 근력, 무릎상해와 관절염 결과지수, 한국판 다리 기능척도를 측정하였다. 두 군 모두 시각적 상사척도, 무릎 굽힘 및 폄 근력, 무릎상해와 관절염 결과지수, 한국판 다리 기능척도 점수에서 치료적 중재 이후에 통계학적으로 유의한 개선을 보여주었다. 또한, 러시안전류 적용군은 경피신경전기자극 적용군보다 무릎 폄 근력과 한국판 다리 기능척도에서 중재 후 유의한 증가를 보였다. 본 연구의 결과를 바탕으로 앞십자인대 재건술 환자에게 있어 두 중재 방법 모두 효과적인 개선을 보였지만, 러시안전류가 경피신경전기자극보다 무릎근력과 다리기능을 개선하는데 더 효과적이라고 보고하며, 향후 임상에서 앞십자인대 재건술 환자의 재활에 러시안전류의 적용에 긍정적인 이점이 있다고 제언하는 바이다.

• 재활치료과학
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• 제11권4호
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• pp.69-83
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• 2022

목적 : 본 연구는 발렌버그 증후군 환자에게 적용한 구강운동촉진기술(OMFT) 프로토콜과 신경근전기자극 치료(NMES)의 임상 적용 효과의 가능성을 확인하고자 하였다. 연구방법 : 발렌버그 증후군 환자 1명을 대상으로 OMFT와 NMES를 4주 동안 주 5일, 1일 2회로 각각 40회씩 적용하였다. 중재 전·후의 변화를 비교하기 위해 포괄적 구강안면기능척도(COFFS), 한국판 Mann 삼킴 능력 평가(K-MASA), 침습-흡인 척도(PAS)를 사용하여 평가하였다. 자료 분석은 중재 전·후의 점수 변화를 비교하였다. 결과 : 본 연구에 참여한 대상자에게 중재 전·후로 구강안면기능과 삼킴능력이 향상되었다. 구강운동 기능 중 혀 운동에 비교적 많은 기능적 호전이 나타났으며, 인두기 삼킴이 가능해지는 정도로 평가되었 고, VFSS를 통한 PAS 평가에서도 5점으로 증상의 개선이 관찰되었다. 결론 : 체계적인 OMFT와 운동강도의 NMES를 적용한 초기 연하재활치료는 구강 운동 기능과 연하장애 개선에 가능성을 확인하였다. 향후 OMFT와 NMES를 적용한 중재의 효과에 대한 보완 연구가 필요할 것이다.

• 대한정형외과학회지
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• 제55권2호
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• pp.117-126
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• 2020

슬관절의 퇴행성 관절염에서 슬관절 전치환술은 널리 시행되고 있고 그 빈도도 점점 증가되고 있다. 수술 후 일상생활로의 복귀, 근력 및 운동범위의 회복 등 기능 회복을 위한 노력이 이루어져야 하고 이는 환자 요인, 수술 술기 및 재활 등 다양한 관점에서 접근해야 한다. 환자의 연령이나 비만의 정도, 성별, 대퇴사두근의 근력 등이 수술 후 기능 회복에 영향을 줄 수 있고 환자의 기대치나 만족도 같은 정신적인 상태도 영향을 준다. 기능 회복을 위하여 수술 전부터 환자교육 및 통증 조절, 대퇴사두근 근력의 강화 같은 치료를 시행할 수 있다. 수술 후 냉찜질 및 압박, 경피적 전기 신경 자극 치료, 신경근육 전기 자극 치료, 저주파 저강도 자기장 치료, 대퇴사두근의 근력운동, 관절범위 운동과 같은 물리치료도 적용할 수 있다. 최근에는 수중에서 근력과 균형감각을 회복시키는 수 치료도 점점 시행되는 추세이다. 이런 기능 회복을 위한 치료들은 수술 후 단기적으로만 시행될게 아니라 장기적으로 꾸준히 시행되는 것이 중요하며 술자는 환자의 상태나, 순응도, 사회적, 심리적 상황 등을 고려하여 적절히 적용하여야 한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1997년도 하계학술대회 논문집 B
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• pp.593-596
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• 1997

The main purpose of this paper is to develop sensing device of joint angle using loss of opfical fiber. The source of light to optical fiber is infrared rays diode, and receiver is a photo transistor. The bent angle of optical fiber is measured with rotary encoder, and The change of voltage due to the loss of light is measured with micro computer PIC16C74. The sensing device may be used to Functional Electrical stimulation(FES) System for Rehabilitation patient.

• International Journal of Control, Automation, and Systems
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• 제4권3호
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• pp.302-307
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• 2006

The aim of applying Functional Electrical Stimulation (FES) is to restore a person's motor function by directly supplying the controlled electrical currents to the site of the paralyzed muscles. However, most clinically utilized FES systems have adapted an open-loop control scheme. Recently the closed-loop control scheme has been considered for setting up the FES system, but due to the inherent nonlinearities in the musculoskeletal system, the nonlinearities were not fully compensated and it caused the oscillatory responses for tracking the output variables. In this study, a nonlinear controller model that has two inverse compensation units is proposed with the compromising feedback linearization method and this will eventually be used to design the FES control system for stimulating a knee joint musculoskeletal system.