• Proceedings of the Korea Inteligent Information System Society Conference
• /
• 2005.05a
• /
• pp.169-185
• /
• 2005

신경계의 뉴런 구조는 흥분 뉴런과 억제 뉴런으로 구성되며 각각의 흥분 뉴런과 억제 뉴런은 주동근 뉴런(agonistic neuron)에 의해 활성화되며 길항근 뉴런(antagonist neuron)에 의해 비활성화 된다. 본 논문에서는 인간 신경계의 생리학적 뉴런 구조를 분석하여 퍼지 논리를 이용한 생리학적 퍼지 신경망을 제안한다. 제안된 구조는 주동근 뉴런에 의해 흥분 뉴런이 될 수 있는 뉴런들을 선택하여 흥분시켜 출력층으로 전달하고 나머지 뉴런들을 억제시켜 출력층에 전달시키지 않는다. 신경계를 기반으로 한 제안된 생리학적 퍼지 신경망의 학습구조는 입력층, 학습 데이터의 특징을 분류하는 중간층, 그리고 출력층으로 구성된다. 제안된 퍼지 신경망의 학습 및 인식 성능을 평가하기 위해 정확성이 요구되는 의학의 한 분야인 기관지 편평암 영상인식과 영상 인식의 주요 응용 분야인 차량 번호판 인식에 적용하여 기존의 신경망과 성능을 비교 분석하였다. 실험 결과에서는 제안된 생리학적 퍼지 신경망이 기존의 신경망보다 학습 시간과 수렴성이 개선되었을 뿐만 아니라, 인식에 있어서도 우수한 성능이 있음을 확인하였다.

• Koreanishche Zeitschrift fur Deutsche Sprachwissenschaft
• /
• v.7
• /
• pp.127-144
• /
• 2003

Die Hedeutungen von drei Verben anregen, aufregen, erregen werden durch '흥분시키다' ohne Unterschied im Deutsch-Koreanisch $W\"{o}rterbuch{\;}erkl\"{a}rt$. Aber sie haben verschiedene Bedeutungen, was man durch einen Vergleich der Valenz feststellen kann und durch eine verschiedene $Bedeutungserkl\"{a}rung$ zu unterscheiden versuchen sollte. Die drei Verben haben die Argumentenkombination 'Origo + $Vorgangstr\"{a}ger$' gemeinsam. Aber erregen muss noch in 2 Sememe eingeteilt werden: erregen 1. '무엇이 누구를 아주 화나게 하거나, 아주 신경질적으로 만들다'(불유쾌한 홍분상태에 빠뜨리다) erregen 2. '무엇이 누구를 성적으로 또는 기쁘게 흥분시키다'(즐거운 흥분상태에 빠뜨리다) erregen 2. muss wiederum in 2 Eedeutungsvarianten aufgeteilt werden: erregen 2.1. '성적인 흥분상태에 빠뜨리다' erregen 2.2. '성적인 흥분은 아니지만, 기쁜 흥분상태에 빠뜨리다' erregen 2.1. und erregen 2.2. werden voneinander unterschieden durch die verschiedene semantische Klasse der $Mominativerg\"{a}nzung$: 'Sexueller Anblick' erscheint fur die semantische Klasse der $Nominativerg\"{a}nzung$ von erregen 2.1.. 'Musik' erscheint fur die semantische Klasse der $Nominativerg\"{a}inzung$ von erregen 2.2.. erregen 1. und aufregen mit negativer Konnotation werden synonymisch verwendet: erregen 1. '무엇이 누구를 아주 화나게 하거나, 아주 신경질적으로 만들다'(불유쾌한 흥분상태에 빠뜨리다) aufregen '무엇이 누구를 아주 화나게 하거나, 아주 신경질적으로 만들다'(불유쾌한 흥분상태에 빠뜨리다) Aber die semantische Klasse $f\"{u}r$ die $Akkusativerg\"{a}nzung$ scheint anders zu sein: 'Mensch odor das $Gem\"{u}t$ eines Menschen' $k\"{o}nnen$ erscheinen $f\"{u}r$ die $Akkusativerg\"{a}nzung$ von erregen 1., $w\"{a}hrend$ nur 'Mensch' $f\"{u}r$ die $Akkusativerg\"{a}nzung$ von aufregen erscheint. Man sollte die Bedeutung und die syntaktische Valenz von anregen anders $erkl\"{a}ren$, je nachdem ein Mensch odor eine $T\"{a}tigkeit$ des $Menschenk\"{o}rpers$ als $Akkusativerg\"{a}nzung$ auftritt: j-n : Kaffee regt(mic) an. '커피가 나를 흥분시키다' Absraktum : das Medikament regt die Verdauung an '약이 소화를 자극하다/촉진하다/북돋우다' Die $Akkusativerg\"{a}nzung$ mit der semantischen Klasse 'Mensch' ist fakultativ weglassbar, $w\"{a}hrend$ sie mit dem Klassem $'T\"{a}tigkeit{\;}des{\;}Menschenk\"{o}rpers'$ obligatorisch ist.

• The Journal of the Korea Contents Association
• /
• v.9 no.9
• /
• pp.278-286
• /
• 2009

The aims of this study were to determined whether excitability of the $\alpha$-motor neuron is modulated by stretching and this changes were associated with flexibility of the muscle. In this study, $\alpha$-motor neuron excitability was measured by using the Hmax/Mmax ratio of the gastrocnemius H-reflex, and muscle flexibility was measured with the range of motion of the ankle dorsiflexion. The gastrocnemii of 10 healthy volunteers were stretched for 4 minutes(2 minutes stretching, 1 minute rest, and 2 minutes stretching) in each session by manual force. The Hmax/Mmax ratio of the H-reflex, as well as the range of motion of the ankle dosiflexion was measured through four different conditions: before stretching, as soon as after $1^{st}$ stretching, as soon as after $2^{nd}$ stretching and at 48 hours after $2^{nd}$ stretching. Excitability of the $\alpha$-motor neuron was decreased significantly after $1^{st}$ and $2^{nd}$ stretching(p<0.05). Furthermore, the range of the dorsiflexion was increased significantly after $1^{st}$ and $2^{nd}$ stretching(p<0.05). However, the excitability of the $\alpha$-motor neuron and range of the dorsiflexion at 48 hours after $2^{nd}$ stretching were not different from those of before stretching. These results suggest that reduced $\alpha$-motor neuron excitability of the gastrocnemius and increased flexibility of the ankle dorsiflexion would be followed by activation of the type III mechanoreceptor which around the ankle joint and the Golgi tendon organ in the gastrocnemius.

• Progress in Medical Physics
• /
• v.15 no.4
• /
• pp.228-236
• /
• 2004

Retinal ganglion cells transmit visual scene as an action potential to visual cortex through optic nerve. Conventional recording method using single intra- or extra-cellular electrode enables us to understand the response of specific neuron on specific time. Therefore, it is not possible to determine how the nerve impulses in the population of retinal ganglion cells collectively encode the visual stimulus with conventional recording. This requires recording the simultaneous electrical signals of many neurons. Recent advances in multi-electrode recording have brought us closer to understanding how visual information is encoded by population of retinal ganglion cells. We examined how ganglion cells act together to encode a visual scene with multi-electrode array (MEA). With light stimulation (on duration: 2 sec, off duration: 5 sec) generated on a color monitor driven by custom-made software, we isolated three functional types of ganglion cell activities; ON (35.0$\pm$4.4%), OFF (31.4$\pm$1.9%), and ON/OFF cells (34.6$\pm$5.3%) (Total number of retinal pieces = 8). We observed that nearby neurons often fire action potential near synchrony (< 1 ms). And this narrow correlation is seen among cells within a cluster which is made of 6～8 cells. As there are many more synchronized firing patterns than ganglion cells, such a distributed code might allow the retina to compress a large number of distinct visual messages into a small number of ganglion cells.

• The Korean Journal of Pharmacology
• /
• v.23 no.1
• /
• pp.15-23
• /
• 1987

To elucidate the mechanism of splanchnic hyperemia associated with chronic portal hypertension, we have investigated the alteration in visceral reflexes in conjuction with circulatory hemodynamics in portal ligated portal hypertension in cats. When capsaicin, bradykinin and vasopressin were injected via splenic artery of sham cat, respectively, they caused not only reflex excitation of systemic arterial pressure, but also elevation of splenic venous pressure with unchanged heart rates. Simultaneously, they evoked the sympathetic efferent excitation of liver (spleno-hepatic reflex) as well as of spleen (spleno-splenic reflex). Similarly, capsaicin upon pledging on the liver surface evoked a significant increase in the pressor reflex with hepatic nerve excitation (hepato-hepatic reflex). After portal ligation, the splenic venous pressure was gradually elevated in association with decrease in systemic arterial pressure. However, the excitation of pressor reflex was enhanced on the and day, thereafter, being returned to the control, and the reflexly induced spleno-splenic, spleno-hepatic and hepato-hepatic sympathetic excitations were significantly diminished on the 8th day following portal vein ligation. In conclusion, it is suggested that sympathetic reflexes to spleen and liver are specifically intervened by the same central pathways and furthermore, the diminution of these viscero-visceral reflex excitations after portal ligation may be related to the intestinal hyperemia.

• Proceedings of the Korean Society of Disaster Information Conference
• /
• 2015.11a
• /
• pp.315-316
• /
• 2015

이 논문에서는 생체정보를 활용하여 심리적 흥분의 측정 가능성에 대한 연구를 하였다. 지능형 전자발찌의 도입에 있어서 생체정보와 감정의 관계를 연구하는 것은 매우 필요하다. 위험상황을 예측하는데 있어서 부착자의 감정을 측정할 수 있다는 것은 하나의 중요한 지표가 될 수 있다. 자율신경계와 감정은 밀접한 관게가 있으며 교감신경은 신체적 반응을 불러일으키는 역할을 하므로 심박을 통해서 감정의 변화, 즉, 심리적 흥분을 측정하는 것은 가능할 것으로 예측된다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2024.05a
• /
• pp.468-470
• /
• 2024

고령으로 거동이 불편하거나 목 아래 전신 마비 또는 와병 환자를 위하여 저가형 단 채널 뇌파(EEG) 측정기를 사용하여 환자의 흥분이나 불안정 상태를 인식할 수 있는 순환신경망(RNN) 기반 뇌파 인식기 모델을 제안하였다. 제한된 환경에서 GRU(Gate Recurrent Unit) 신경망을 사용한 뇌파 인식기는 <정상/안정>은 인식률 100%, <흥분/불안정>은 90%의 인식률을 보였다. 또한, 자체 개발한 생체신호 기반 호출 시스템과 연동하여 구현함으로써 적용 가능성을 검증하였다.

• Journal of Intelligence and Information Systems
• /
• v.11 no.2
• /
• pp.81-103
• /
• 2005

The Neuron structure in a nervous system consists of inhibitory neurons and excitory neurons. Both neurons are activated by agonistic neurons and inactivated by antagonist neurons. In this paper, we proposed a physiological fuzzy neural network by analyzing the physiological neuron structure in the nervous system. The proposed structure selectively activates the neurons which go through a state of excitement caused by agonistic neurons and also transmit the signal of these neurons to the output layers. The proposed physiological fuzzy neural networks based on the nervous system consists of a input player, and the hidden layer which classifies features of learning data, and output layer. The proposed fuzzy neural network is applied to recognize bronchial squamous cell carcinoma images and car plate images. The result of the experiments shows that the learning time, the convergence, and the recognition rate of the proposed physiological fuzzy neural networks outperform the conventional neural networks.

• The Journal of the Korea Contents Association
• /
• v.8 no.6
• /
• pp.167-174
• /
• 2008

The application of tape is being widely used for treatment of the musculoskeletal disorders and injury prevention. The techniques of the tape application has been relied on empirical evidence in preference to the neurophysiological evidence. Thus, the mechanism of taping has to be elucidated further. In this study, we assessed the effect of the elastic and non-elastic tape upon the gastrocnemius ${\alpha}$-motor neuron excitability using the gastrocnemius H-reflex. The amplitude of the M-wave and H-reflex were measured across three conditions: before tape application, with tape and with the tape removed. No significant changes of the excitability of the ${\alpha}$-motor neuron were obtained across three condition, either in the elastic and non-elastic tape. This results were quite different with other recent studies, which needs to be explored further.

• 전기의세계
• /
• v.45 no.11
• /
• pp.16-20
• /
• 1996

본 글에서는 신경섬유에 활동전압들이 전달될 때 새성되는 활동의존 막흥분성의 변화가 신경계에서의 정보처리와 어떠한 관련성이 있는가를 알아보기로 한다.