• Journal of Korean Neurosurgical Society
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• v.39 no.5
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• pp.396-399
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• 2006

Brachial plexus schwannoma is rare. A case of a 28-year old woman who complained of a palpable mass in the right axilla is presented. She had previous incisional biopsy on the axillary mass. Brachial plexus magnetic resonance imaging revealed a well circumscribed contrast enhancing mass on the right distal cord of the brachial plexus. EMG revealed normal. Tumor resection was performed with the transaxillary approach. Though dense granulation tissue obscured normal brachial plexus nerve anatomy, using the surgical microscope and nerve stimulator, grossly total tumor resection was performed. She is free of any neurologic symptom at three months postoperatively.

• JSTS:Journal of Semiconductor Technology and Science
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• v.17 no.1
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• pp.35-41
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• 2017

We propose a novel multi-photodiode array (MPDA) based retinal implant IC with on/off stimulation strategy for a visual prosthesis with improved spatial resolution. An active pixel sensor combined with a comparator enables generation of biphasic current pulses when light intensity meets a threshold condition. The threshold is tuned by changing the discharging time of the active pixel sensor for various light intensity environments. A prototype of the 30-channel retinal implant IC was fabricated with a unit pixel area of $0.021mm^2$, and the stimulus level up to $354{\mu}A$ was measured with the threshold ranging from 400 lx to 13120 lx.

• Journal of information and communication convergence engineering
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• v.6 no.1
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• pp.73-79
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• 2008

Result that study magnet nerve curer for treatment induced current generation and current of ion for development in main point incontinence, prostate, sphincter, nervous system, rigidity, headache, retrogression arthritis, ligament damage, Rheumatism arthritis, peripheral nerve etc., can classify by 4. Embodied do first, full bridge magnet occurrence chapter, and communication with PC is available, confirmed various action loops an experiment. Could confirm correct treatment probe second, woman and man disease person. Third, derived so that healing may be possible naturally by addition of apron form according to disease. Because composition of finally, treatment probe composes by act of negative plate form, manufacture is easy and cooling designed for easy direction. More superior result of cooling appeared than existing in incidental and ingredients, cooling efficiency, composition, complexity, convenience etc. that expense and composition manufacture very straightforwardly and experimental by 2 - Tank ways.

• Proceedings of the KIEE Conference
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• 2004.07d
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• pp.2690-2692
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• 2004

Medications or cognitive-behavior methods have been mainly used as a treatment of alcoholism. lately the virtualy technology has been applied to the kink of alcoholic disorders. A virtual environment makes him having ability to over come the drink. In this study, we were implemented by making panorama images and 3D object modules using 3D Studio MAX. VRML, JAVA Applet. And the BAR stimulator that composed with a position sensor head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a alcoholism and and without a liquor bottle, heart rate was measured during experiment, and also measured a Person's HR after the virtual reality training. we demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

• Proceedings of the KSMRM Conference
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• 2001.11a
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• pp.104-104
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• 2001

Purpose： In this study, we investigated the possible motor pathways of hemiplegic stroke patients usin combined TMS and BOLD fMRI approach and evaluated the correlation between TMS a fMRI methods. Method： Four subjects, who demonstrated left hemiplegia after stroke, are included. TMS was performed using a Dantec Mag2 stimulator (Dantec Company, USA) in single puls mode with figure eight-shaped coil. Following TMS localization, The BOLD T2＊-weight images were acquired with echo planar imaging sequence (TR = 1.2 sec, TE = 60 msec, and flip angle = 90). Motor activation was studied by means of a repetitive fing flexion-extension task. The stimulation protocol comprised 10 cycles of alternating activati and rest (10 images per cycle). Total 60 cycles were performed and each cycle take abou 1.5 sec. The resulting images were then analyzed with STIMULATE (CMRR, U, o Minnesota) to generate functional maps using a student t-test (p < 0.0005) and cluste analysis.

• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.26-26
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• 2003

목적： 본 연구의 목적은 미각자극에 대한 인간 뇌의 활성화 영역을 측정하고 가시화하여 미각의 뇌 활성화 부위에 대한 기초자료를 마련하는데 있다. 대상 및 방법： 5명의 남자 대학생 (평균 24.8세)을 뇌기능 연구의 실험 대상자로 선정하였고, 대상자들은 미각에 이상이 없고 구강수술 경험이 없는 오른손잡이를 대상으로 3번에 걸쳐 EPI 혈액산 소농도의존(blood oxygen level dependent)법을 이용하여 미각자극에 의한 기능적 자기공명영상 실험을 수행하였다. 미각 자극을 위하여 5％의 saline을 사용하였으며 자체적으로 제작한 Stimulator를 사용하여 자극하였다. 자극은 3회의 휴식기간과 2회의 자극기간에 걸쳐 시행하였으며, 각 자극기간은 30초씩 5초 간격으로 이스 당 42개의 영상을 획득했다. Post-processing은 SPM99 (Statistical Parametric Mapping 99, The Wellcome Department of Cognitive Neurology, Oxford 1999)의 correlation법을 사용하여 threshold 0.4∼0.7의 범위에서 통계처리 하였으며, 활성화 영상은 EPI영상과 같은 부위의 T1 강조영상에 overlapping시켰다. 이렇게 얻어진 fMRI 영상으로 활성 영역의 위치를 분석하였다.

• Proceedings of the KOSOMBE Conference
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• v.1992 no.11
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• pp.89-92
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• 1992

The sensory nerve study is the important index to diagnosis peripheral neuromyotic disease. This paper discusses about the design of parameter - latency, amplitude, conduction velocity - measurement system in the sensory nerve. This system consists of three parts which are Main Control Unit(MCU), Stimulator, and external output unit. Also new measurement algorithms which is adaptive threshold method is presented in this paper. The designed system is controlled by MCU includes automatic detection algorithms and self-diagnostic functions.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2000.11a
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• pp.202-206
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• 2000

본 연구에서는 회전 자극기를 이용하여 성별에 따른 회전 평형감각 특성을 분석하였다. 피검자는 정상성인 남녀 각각 10명에 대해, 두부회전과 rotatory chair test(RCT)에 의한 회전자극 전과 후의 변화정도를 살펴보았고, COP, Flicker Test, 적외선 카메라를 이용한 체열 측정 등을 통해 전정자극 특성을 평가하였다. 그 결과 COP를 통한 신체동요도 측정 결과 회전자극 제시 후 두부회전의 경우 총 누적거리가 1.47배, RCT의 경우 1.78배까지 증가했고, 플리커 치는 여성(8.6%)이 남성(5%)보다 높게 나타났고, 여성이 남성보다 회전자극에 민감함을 알 수 있었다. 또한, 남녀 모두 회전 자극 후 눈 주위의 온도상승이 미소하게 일어남을 알 수 있었다.

• Proceedings of the KSLP Conference
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• 1996.11a
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• pp.86-86
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• 1996

연축성 발성장애(spasmodic dysphonia)는 아직까지 그 원인을 정확히 밝혀내지 못하고 있는 만성적인 발성장애로 과거에는 경직성 발성장애(spastic dysphonia)로 불리던 질환이다. 연축성 발성장애는 두 종류 즉, 내전형(adductor)과 외전형(abductor)으로 나누어지며 이중 내전형이 대부분이다. 외전형 연축성 발성장애는 발성도중에 성대가 갑자기 불수의적으로 외전되면서 음성이 중단되므로 원활히 대화하기가 힘든 질환이다. 이러한 질환은 국소적 근긴장이상(fecal dystonia)의 일종이다. 현재까지 연축성 발성장애의 치료법으로 사용되고 있는 것으로는 언어치료, botulium 독소주입술, 편측반회후두신경절 단술, 반회후두신경분쇄술, 상후두신경절단술, 갑상연골성형술, implantable stimulator 등이 있다. 연축성 발성장애 환자에 $Botox^{circledR}$ 주입에 관한 보고는 주로 내전형에 대해서만 보고되고 있으며 외전형에 대하여 보고된 예는 매우 적다. (중략)

• International Journal of Industrial Entomology and Biomaterials
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• v.13 no.2
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• pp.119-122
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• 2006

As the Selenium is known to be growth promoter in sheep and cattle, the efficacy of selenium has been tested in silkworm Bombyx mori L. The V instar larvae were fed with lethal and sub-lethal doses of selenium treated leaves. The larvae fed with lethal dose showed a significant decrease in growth and Cocoon commercial characters. The treatment with sub lethal dose exhibited a significant increase in the growth of the silkworm. Correspondingly, the cocoon commercial characters on exposure to the lethal dose showed significant decrease and sub lethal dose showed a significant increase. In the light of similar findings reported earlier in other cocoon crops and vertebrates, it can be inferred that selenium at lower doses acts as a growth stimulator, resulting in the higher yield of cocoon crop.