• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2009.05a
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• pp.95-96
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• 2009

행동활성화 및 억제체계의 민감성에 따라 4 개 집단으로 분류하고, 각 집단에 대하여 뇌파를 측정하여 전전두엽의 비대칭성을 평가하였다. 이들 각 집단에 대하여 긍정적 감성을 유발시킬 수 있는 음향(명상음악)과 부정적 감성을 유발시킬 수 있는 음향(소음)을 제시하여 그 반응을 분석한 결과, 명상음악 청취에 대한 주관적 감성평가는 4 개 집단 모두 비슷한 수준의 긍정적 감성을 나타냈지만, 전전두엽의 비대칭성은 행동억제체계가 민감한 집단에 비하여 행동활성화체계가 민감한 집단일수록 좌측 전전두엽이 더 활성화되는 것으로 나타나 Davidson 의 행동활성화 및 행동억제체계의 단일차원을 지지한다. 소음청취에 대한 주관적 평가에서는 4개 집단 모두 비슷한 수준의 부정적 감성을 나타낸 반면에, 전전두엽의 비대칭성은 행동활성화 또는 억제체계의 민감성이 어느 하나라도 높은 3 개 집단 모두에서 우측 전전두엽이 더 활성화 되었지만, 민감성이 모두 낮은 나머지 1 개 집단에서는 좌측 전전두엽이 더 활성화되는 것으로 나타나 Gray의 행동활성화 및 행동억제체계의 독립차원을 지지한다.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2007.05a
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• pp.118-120
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• 2007

동일한 감성자극을 받더라도 개인의 대뇌변연계에 저장된 정보에 의하여 그 느끼는 감성이 달라진다. 대뇌변연계에 저장되는 정보에 영향을 주는 요소로서 전전두엽의 비대칭성, 성별, 연령, 문화, 교육, 환경(지역 및 사회적) 등이 있다. 예를 들면 동일한 음질을 갖는 소리에 대하여 청취하는 사람에 따라 서로 다른 음향감성을 느끼게 되며 동일한 색채에 대하여는 풍토색이 서로 다른 환경에서 성장할 경우 그 느끼는 색채감성이 달라지게 된다. 이와 같이 감성에 영향을 주는 여러 요인들과 그 결과와의 상관성을 도출하여 궁극적으로 감성적 생리/병리에 활용하기 위해 산업자원부 지정 심뇌혈관데이터센터에서는 향후 감성에 영향을 줄 수 있는 다양한 생리신호와 그 결과로서의 감성을 체계적으로 데이터베이스화 해나갈 계획이다.

• Science of Emotion and Sensibility
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• v.8 no.1
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• pp.47-54
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• 2005

This study is aimed to inspect how the different sensitivities in Behavioral activation system(BAS) and behavioral inhibition system(BIS) modulate on the properties of physiological responses stimulated by positive or negative affective sound. We measured the electroencephalogram(EEG) and electrocardiogram (ECG) of 32 students, consisted of four groups depending on the BAS and BIS sensitivities, during listening to meditation music or noise. The EEG was recorded at Fpl and Fp2 sites and Power spectral density(PSD) of HRV was derived from the ECG, and the power of HRV was calculated for 3 major frequency ranges(low frequency[LF], medium frequency and high frequency[HF]). After listening to music or noise, subjects reported the affect induced by the sound. For EEG, the power in the alpha band at Fp2, especially in the alpha-2 band(9.0-11.0 Hz) increased during the subjects listening to music, while the power at Fpl increased during noise. During listening to meditation music, there is a tendency that the left-sided activation in prefrontal cortex(PFC) is positively correlated with the difference of BAS(Z)-BIS(Z). During listening to noise, there is a tendency that the right-sided activation in PFC is dominant in case any of the sensitivity of BAS or BIS is high. For HRV, we found that the index of MF/(LF+HF), during listening to music, was higher significantly in the individuals with a low BIS but high BAS than in the individuals with a low sensitivity both BIS and BAS individuals. With high BIS, regardless of the BAS sensitivity, the difference of this index values was not significant. From these results we suggest that the physiological responses of different individuals in BAS and BIS react differently under the same emotionally provocative challenge.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.12 no.6
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• pp.2588-2597
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• 2011

The EEG asymmetry of prefrontal lobe has been researched to analyze the affect such as depression or anxiety and the behavioral characteristics such as BIS(Behavioral Inhibition System)/BAS(Behavioral Activational System) on the basiss of alpha band. However there has been several proposals about the importance of beta asymmetry pointing out the limitation of alpha asymmetry. Here, for 44 numbers of 4-year-old children, by comparing alpha asymmetry and beta asymmetry with BIS/BAS results respectively, we propose the way to classify the characteristics of affect and behavioral trend. We also found that BIS is related with beta-asymmetry, while BAS is related with alpha-asymmetry. As for the affective trait, we use the alpha asymmetry following the other results. Our results seem to be consistent with the other results that the synapse formation of young children is more active at the hemisphere than the right hemisphere.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2008.10a
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• pp.54-57
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• 2008

This study is aimed to inspect how the different sensitivities in Behavioral activation system (BAS) and Behavioral inhibition system (BIS) modulate on the properties of physiological responses stimulated by positive or negative affective sound. We measured the electroencephalogram (EEG) of 32 students, consisted of four groups depending on the BAS and BIS sensitivities, during listening to meditation music or noise. The EEG was recorded at Fp1 and Fp2 sites. After listening to music or noise, subjects reported the affect induced by the sound. For EEG, the power in the alpha band at Fp2, especially in the alpha-2 band (9.0-11.0 Hz) increased during the subjects listening to music, while the power at Fp1 increased during noise. During listening to meditation music, there is a tendency that the left-sided activation in prefrontal cortex (PFC) is positively correlated with the difference of BAS(Z)-BIS(Z). During listening to noise, there is a tendency that the right-sided activation in PFC is dominant in case any of the sensitivity of BAS or BIS is high. From these results we suggest that the physiological responses of different individuals in BAS and BIS react differently under the same emotionally provocative challenge.

• Science of Emotion and Sensibility
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• v.19 no.1
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• pp.83-94
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• 2016

The purpose of this study is to find out the relationships of brain laterality, active EEG over all brain regions and personality traits by measuring EEG signals on the basis of the counseling psychology personality theories. For this study, the EEG of ninety-six college students as measured by an eight channel EEG device and analyzed through the computer and the data of their Big Five Personality Test were analyzed by statistical analysis. The result was that when theta's laterality at the prefrontal lobe is bigger, neuroticism is higher in the personality factors. On each of the brain regions, theta's activity on the left of the prefrontal lobe makes higher neuroticism but lower conscientiousness, and beta's activity on the left of the frontal lobe makes lower extroversion and openness to experience. These results showed that there are statistically meaningful relationships between the brain region activated specific EEG and individual personality or psychological traits. This study branched out into theta band while most previous studies measured in alpha and beta band. Also from these results it suggested the counseling strategy with the brain and follow-up studies.

• KIPS Transactions on Software and Data Engineering
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• v.3 no.10
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• pp.451-456
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• 2014

The correlations between electroencephalographic (EEG) spectral power and emotional responses during affective sound clip listening are important parameters. Hemispheric asymmetry in prefrontal activation have been proposed in two decades ago, as measured by power value, is related to reactivity to affectively pleasure audio stimuli. In this study, we designed an emotional audio stimulus experiment in order to verify frontal EEG asymmetry by analyzing Event-related Spectral Perturbation (ERSP) results. Thirty healthy college male students volunteered the stimulus experiment with the standard IADS(International Affective Digital Sounds) clips. These affective sound clips are classified in three emotion states, high pleasure-high arousal (happy), middle pleasure-low arousal (neutral) and low pleasure-high arousal (fear). The analysis of the data was performed in both theta (4-8Hz) and alpha (8-13Hz) bands. ERSP maps in the alpha band revealed that there are the stronger power responses of high pleasure (happy) in the right frontal lobe, while the stronger power responses of middle-low pleasure (neutral and fear) in the left frontal lobe. Moreover, ERSP maps in the theta band revealed that there are the stronger power responses of high arousal (fear and happy) in the left pre-frontal lobe, while the stronger responses of low arousal (neutral) in the right pre-frontal lobe. However, the high pleasure emotions (happy) can elicit greater relative right EEG activity, while the low and middle pleasure emotions (fear and neutral) can elicit the greater relative left EEG activity. Additionally, the most differences of theta band have been found out in the medial frontal lobe, which is proved as the frontal midline theta. And there are the strongest responses of happy sounds in the alpha band around the whole frontal regions. These results are well suited for emotion recognition, and provide the evidences that theta and alpha powers may have the more important role in the emotion processing than previously believed.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.21 no.2
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• pp.124-132
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• 2020

This study examines the clinical availability of alpha amplitude, asymmetry and mean frequency in old age as EEG indexes reflecting brain health condition. The EEGs of prefrontal lobes in eye closure state were measured for 4 minutes with 72 male and female elderly people aged 73. Subjects were divided into higher and lower groups based on average values of alpha amplitude, asymmetry and mean frequency. The results of correlations and t-test among EEG indexes were as follows. First, the higher Alpha altitude was, the higher physical and mental stress resistance and left-to-right brain communication were, and the lower mean Alpha mean frequency location was. The higher Alpha asymmetry was, the lower left-to-right communication level was. Second, as Alpha power of right brain was higher than that of left brain, Alpha amplitude and mental stress resistance and left-to-right brain communication level were higher. Third, as Alpha mean frequency location was higher, Alpha amplitude and mental anti-stress level were lowered and arousal level was enhanced. These high correlations and complementary meaning among quantitative EEG indicators demonstrated the possibility of biomarkers reflecting brain health state in old age.