• Proceedings of the Korean Society for Cognitive Science Conference
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• 2005.05a
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• pp.273-277
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• 2005

본 연구는 한국어 어말어미 산출시 나타나는 대뇌 활성화 영역을 살펴보기 위하여 실시되었다. 두 가지 실험이 실시되었다 실험 1은 어말어미의 기본형을 주고 이를 의문형, 명령형으로 산출하는 고립단어 실험을 실시하였다. 통제 조건으로 모음변환조건(C1)과 아라비아문자보기(C2)를 사용하였다. 실험 1의 결과 ‘어말어미-C1’ 조건에서 좌반구의 측두엽과 전두엽부분의 의 활성화 superior temporal gyrus와 inferior frontal gyrus의 활성화가 관찰되었다. ‘어말어미-C2’ 의 조건에서 우반구에서 후두엽의 활성화와 좌반구에서의 후두엽, 전두엽, lingual G, Cuneus, fusiform G, inferior occipital G에서의 활성화를 관찰할 수 있었다. 실험 2는 명령형과 의문형 어미의 형태점화효과와 관련된 대뇌 활성화 영역을 관찰하기 위하여 Er-fMRI 기법을 이용하여 실시되었다. 실험 조건은 어미동일조건, 어간반복조건, 무관련 조건으로 구성되었다. 피험자들은 점화자극이 제시된 후 신호가 제시되고 나오는 표적단어를 의문형 또는 명령으로 산출하도록 하는 과제를 실시하였다. 뇌 활성화 영역을 분석한 결과 의문형과 명령형을 산출할 때의 활성화 영역에서 $^{\ast}^{\ast}^{\ast}$를 볼 때의 영역을 빼기 (substraction)한 결과 공통적으로 좌반구 브로카 영역이 활성화되었고, 의문형과 명령형 안에서 어미동일조건에서 무관련 조건을 뺀 경우에는 좌반구의 superior temporal G 영역의 활성화가 관찰되었다. 이들 결과를 종합해 볼 때 어말어미 산출 그 자체와 직접 관련되는 영역으로는 좌반구의 측두엽과 전두엽 부분이 관찰되었다. 특히 한국어 어말어미 산출시 나타나는 형태점화 양상과 관련된 대뇌영역으로 발견된 브로카 영역에서의 활성화는 어미 변환과 관련된 영역이라기보다는 산출시 관련되는 articulation, motor coordinate관련 영역으로 추정되고, 측두엽의 활성화는 형태소, 의미 관련 지식의 data base로 추정된다. 또한 우반구 전두엽 부분에서 관찰된 활성화는 억제관련 영역으로 짐작된다.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.20 no.6
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• pp.219-227
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• 2019

The purpose of this study is to investigate the relationship between self - integration and frontal cognitive function in the welfare center users. The data were collected on January 18-30, 2018. 120 people in the M city, has participated in more than 65 years older. data were analyzed using frequency, mean and standard deviation, t-test, ANOVAs, and Pearson's correlation coefficient and multiple regression analysis. The results of this study showed that current satisfaction of welfare center users is statistically different from 'attitude toward life', 'acceptance of lifetime', 'satisfaction of present life' of ego integrity. Self - integration sense showed 28.3% explanatory power in current life. Effect of prefrontal cognitive function in accordance with the partner showed a 16.1% explanatory power This study suggests the necessity of policy and program development for the elderly community life to improve self - integration and frontal cognitive function in old age.

• Journal of Biomedical Engineering Research
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• v.25 no.3
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• pp.227-233
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• 2004

In this paper, it is proposed that the four channel electrode arrangement at a frontal lobe and the noise reduction method using a JADE for the EEG biofeedback system. The proposed electrode arrangement is based on the retina-cornea dipole model. Using JADE and signals which are acquired by the proposed arrangement, four independent components are separated. To estimate a pure EEG component among four components, it is measured that a ratio of alpha wave to the whole signal and then the component that has a maximum value is considered as a pure EEG which the noise is eliminated. As a result of experiments, the proposed methods are effective in reduction of noises during acquisition of the EEG.

• Journal of Korea Multimedia Society
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• v.6 no.1
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• pp.167-175
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• 2003

In this paper, a new electrode configuration and EOG removal method are proposed in order to measure EEG effectively on the frontal lobe and remove EOG in the measured raw EEG. The method of measuring EEG is proposed using four electrodes and a ground electrode on the frontal lobe with a reference electrode at the left earlobe. And also, the separation method using ICA is proposed for EOG removal from the measured EEG, Through the experiments of measuring EEG it was demonstrated that a subject can attach the electrodes by himself easily to measure his own EEG without any assistant and the proposed methods were suitable for removing EOG signal from the measured EEG.

• Journal of The Korean Association For Science Education
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• v.18 no.3
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• pp.427-441
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• 1998

The present study tested the hypothesis that adolescents' performance on scientific reasoning tasks and their ability to change theoretical concepts during instruction are mediated by prefrontal-cognitive functions, such as planning and inhibiting. Subjects sampled from four Korean secondary schools were administered a test of scientific reasoning ability and tests of the prefrontal lobe functions. A series of lessons on theoretical concepts was also administered. Subjects' performance on the test of scientific reasoning and pre- to posttest gains in the concept test were used as dependent variables. This study found that students' planning and inhibiting abilities were highly correlated with and they significantly predicted their scientific reasoning ability and conceptual gains. Further, principal component analysis showed prefrontal lobe functions were categorized into two main components. Component 1, which was loaded by planning and working memory functions, was termed as the representing process. Component 2, which was loaded primarily by the inhibiting functions, was termed as the inhibiting process. Scientific reasoning and conceptual change were also linked to these two components, indicating that these cognitive processes are mediated by both representing and inhibiting processes.

• Korean Journal of Biological Psychiatry
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• v.8 no.2
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• pp.271-275
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• 2001

Hyposexuality after stroke has been frequently observed, but hypersexuality as a sequela of stroke has not been commonly documented. We report a patient who exhibited hypersexuality and obsessive-compulsive behaviors after stroke in the region of the left mesial frontal cortex and both basal ganglia. At 2 months after stroke, he visited psychiatric unit due to these symptoms. His motor function was almost full recovered. He was treated with fluvoxamine and perphenazine. With two-month medication, his hypersexuality and obsessive-compulsive behavior disappeared. This case may indicate that basal ganglia-thalamocortical circuit plays an important role in the mediation of sexual behavior and obsessive-compulsive behavior. Since changes in sexual activity may not be spontaneously reported, a systemic inquiry into patient's sexual functioning after infarction in frontal lobe or basal ganglia is warranted.

• The Korean Journal of Nuclear Medicine
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• v.34 no.6
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• pp.456-464
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• 2000

Purpose: To evaluate the effect of acupuncture on regional cerebral blood flow (rCBF) at acupoints suggested by oriental medicine to be related to the treatment of cerebrovascular diseases. Materials and Methods: Rest/acupuncture-stimulation Tc-99m ECD brain SPECT using a same-dose subtraction method was performed on 54 normal volunteers (34 males, 20 females, age range from 18 to 62 years) using six paradigms: acupuncture at acupoints GV. 20, GV. 26, LI. 4, ST. 36 and SP. 6. In the control study, needle location was chosen on a non-meridian focus 1 cm posterior to the right fibular head. All images were spatially normalized, and the differences between rest and acupuncture stimulation were statistically analyzed using SPM$^{(R)}$ for Windows$^{(R)}$. Results: Acupuncture applied at acupoint GV. 20 increased rCBF in both the anterior frontal lobes, the right frontotemporal lobes, and the left anterior temporal lobe and the left cerebellar hemisphere. Acupuncture at GV 26 increased rCBF in the left prefrontal cortex. Acupuncture at LI. 4 increased rCBF in the left prefrontal and both the inferior frontal lobes, and the left anterior temporal lobe and the left cerebellar hemisphere. Acupuncture at ST. 36 increased rCBF in the left anterior temporal lobe, the right inferior frontal lobes, and the left cerebellum. Acupuncture at SP. 6 increased rCBF in the left inferior frontal and anterior temporal lobes. In the control stimulation, no significant rCBF increase was observed. Conclusion: The results demonstrated a correlation between stimulation at each acupoint with increase in rCBF to the corresponding brain areas.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2001.11a
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• pp.138-143
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• 2001

본 연구에서는 생환공간에서의 음향감성을 평가하기 위하여 긍정감성을 유발하는 음환경으로서 '명상음악'과 부정감성을 유발하는 음환경으로서 '헬리콥터소음'과 '마루가 삐거덕거리는 소음'을 제시하였을 때 행동활성화체계(BAS)와 행동억제체계(BIS)의 민감성이 서로 다른 집단들을 대상으로 전전두엽의(PFC) 비대칭성과 심장박동율변동성(HRV)을 분석하였다. 연구결과, 명상음악을 청취시에는 안정상태에 비하여 좌측전두엽이 더 활성화되고 HRV의 LF/HF는 감소된 반면에 소음환경에서는 우측전두엽이 더 활성화되고 LF/HF는 더 증가하였다.

• Journal of Yeungnam Medical Science
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• v.10 no.2
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• pp.544-549
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• 1993

The authors have experienced a case of organic mental disorder with bilateral frontal lobe atrophy in a 36-year-old man. He showed negative symptoms of schizophrenia such as anhedonia, social withdrawal, flat affect, poverty of thought.

• Science of Emotion and Sensibility
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• v.1 no.1
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• pp.123-133
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• 1998

시계열 예측은 효과적인 기업 경영에 반드시 필요한 활동이지만, 이와 관련 인간의 인지처리 과정에 대한 연구는 아직까지 미비하다. 본 연구는 인간 감성이 시계열 예측에 미치는 영향을 탐색하였다. 본 실혐에서는 반복을 통한 2(감성) x 2(횟수) 팩토리얼 설계를 채택하였다. 감성은 청각, 시각, 후각자극을 통해 환경을 조성하고 준비된 시나리오를 연상케하여 유발시켰다. 12명의 대학, 대학원생이 실험에 참여하였으며, 감성의 영향을 탐색하기 위해 뇌파(EEG)와 피부저항(GSR)이 후두엽(Oz)과 전두엽(Fz)에서 측정되었다. 그 결과 인간의 감성은 예측에 유의적인 영향을 보였다. 즉, 피험자가 부정적인 감성을 갖을 때 긍정적인 감성에 비해 예측의 정확성이 높은 경향이 있었다. 그 이유는 부정적 감성일 경우 전두엽에서 베타가 많이 출현하였고, 이는 시계열 예측의 정확도를 향상시키는 역할을 하였다.