Background: Most studies targeting stroke patients have confirmed improvements in balance and walking using immersive and non-immersive virtual reality training programs. However, to date, there are not many studies targeting brain activation enhancement for the two training programs. Objectives: The purpose of this study is to investigate the effect of a virtual reality training program on the EEG of stroke patients according to differences in immersion. Design: A randomized controlled trial. Methods: A total of 20 stroke patients, with 10 in an immersive virtual reality training programs group (IVRG) and 10 in a non-virtual reality training programs group (NVRG) were randomly assigned to exercise three times a week for 6 weeks. EEG was measured for 2 minutes using DSI-24. Results: The intra-group difference in relative alpha waves of brain waves was not significant for both groups, and the between-group difference was not significant. Differences in EEG relative beta waves in the experiment group were significant in the Fp1, Fp2, Cz, C3, C4, P3, and O2 in the experiment group, and significant in the Cz and O2 in the control group. As a result of comparing the differences between each group before and after, there was a significant difference in the Fp1 area. Conclusion: Virtual reality training programs based on differences in immersion were found to have a positive effect on EEG. Therefore, it is believed that a virtual reality training program based on differences in immersion can be provided as a clinical intervention method for EEG.

In the current study, we directly measure consumers’ physiological responses (i.e., brain waves via electroencephalogram [EEG]) to advertising stimuli (digital storyteller vs. human storyteller) to confirm the narrative transportation process of storytelling immersion.

The research examines the influence of emotions on tourists’ visit intention towards sustainable tourism and evaluation by using the application of an electroencephalogram (EEG). This method can give objective information about tourist emotion reactions towards sustainable tourism experiences that will drive tourists’ visit intention. The main research objective was to observe and evaluate consumer’s brain activity in different brain regions while they were being exposed by sustainable tourism experiences as stimuli. The participants consists of 30 local and foreign tourist, have normal vision, right-handed, and are considered as potential visitors of sustainable tourism destination. The participant’s brain activity was collected using neuroheadset (EEG) with an international 10/20 system. Analyzing of tourists’ emotions may help marketers to build their customer's experience and reach their target markets more effectively and develop strategies to ensure that the consumer’s attracted.

본 논문에서는 각 사용자에게 적합한 게임의 난이도 조절을 위하여 인간의 생리적 반응을 분석하는 방법을 이용하여 객관적이고 정량적인 사용자 반응을 측정하는 방식을 사용하였다. 생리적 신호 측정 방식 중 인간의 인지와 감정을 계량하는데 적합한 뇌파 신호를 측정하고 기존의 연구에서 사용되었던 지표를 이용해 측정한 신호를 분석하였다. 그리고 기존의 다른 분야에서 사용하던 지표를 게임의 난이도에 적합하게 개선하여 기존의 방식을 그대로 사용한 결과와 비교하여 어떤 개선점을 보이는지 확인하였다. 이를 위해 먼저 피험자의 휴식 상 태에서 나타나는 뇌파를 측정하여 기준이 되는 배경 뇌파로 사용하였다. 테트리스에 두 가지 난이도를 설정하고 각각의 난이도를 진행하는 피험자의 뇌파를 측정하였다. 각 난이도에서 측정한 뇌파와 기준이 되는 배경 뇌파의 차이를 각 난이도를 진행할 때 피험자가 보이는 뇌파 반응의 결과로 간주하였다. 이 결과를 기반으로 지금까지 다양한 분야에서 지표로 삼았던 뇌파의 대역별 주파수 변환 결과를 비교 지표로 사용하는 방식과 좌뇌와 우뇌의 비대칭성을 기반으로 긍정, 부정을 파악하는 지표로 사용하는 방식, 알파파와 베타파의 비례 값을 각성, 이완의 지표로 사용하는 방식으로 분석하였다. 마지막으로 세타파를 기준으로 알파파와의 비례 결과와 베타파와의 비례 결과를 각각 몰입과 긴장의 지표로 이용하여 분석하였다.

One of the most demanded competencies of an oral health professional such as an oral pathologist is the ability to make clinical decisions. The purpose of this study was to examine the neurological differences between beginners and experts in the clinical decision-making process which consisting of complex, dynamic and sophisticated cognitive processes, and to identify the characteristics of experts based on the brain by comparing EEG activity. This study conducted experimental design with 10 dentists with more than 10 years of clinical experience and 10 students with short clinical experience as beginners as a fourth year student before graduation. The hypothesis-oriented algorithm proposed in HOAC II was used. As a standard, the clinical decision-making stage of the dentist was divided into three stages, and an event was developed and an experiment was designed for measuring EEG for each stage. The cerebral activity distribution patterns of the two groups were measured with EEG, compared and analyzed with pre-processing process using EEGlab. As a result, the difference in the auditory information was not noticeable between the novice and the expert, but the difference between the group of the novice and the expert appeared in the visual data and the radiographic data. In the case of beginners, the activity was higher in the left hemisphere, and in the case of experts, both brains were activated. The results of this study are intended to present objective information based on brain-based analysis of differences that appear in the clinical decision-making process of experts and beginners. It can be used as basic research data to present the brain-based characteristic analysis of dentist experts.

자동차 고급화 추세에 따라 소비자의 차량 실내 환경에 대한 관심이 증가함에 따라 자동차의 기본적 성능뿐만 아니라 실내 쾌적성 향상에 관심이 증대되고 있다. 또한 자동차 실내 쾌적성에 대한 연구는 운전자에게 만족을 제공하 는데 그치지 않고, 운전자의 불쾌지수 및 스트레스를 낮추어서 교통사고의 위험을 줄이는데 기여할 수 있기 때문에 매우 중요한 연구 주제이다. 따라서 본 연구에서는 운전자의 뇌파측정을 통해 통풍시트의 온도변화에 따른 쾌적감 변화와 쾌적온도를 알아보고, 온도변화에 따른 남녀간 쾌적감에 대한 차이를 탐색하고자 하였다. 연구결과 첫째 통풍시 트의 온도가 22℃, 25℃, 28℃에서 각각의 실험군을 비교한 결과 28℃보다 25℃에서 통계적으로 유의하게 쾌적감이 더 높게 나타났다. 둘째 통풍시트 온도 변화에 따른 남녀간 쾌적감에 대한 실험결과 남성과 여성이 온도에 따라 느끼는 쾌적감은 통계적으로 유의한 차가 없는 것으로 나타났다. 향후 자동차의 실내온도와 통풍시트의 온도 변화에 따른 운전자의 쾌적감 변화를 파악하여 상관관계를 분석한다면, 운전자의 쾌적성을 확보하여 휴먼에러로 인한 교통사고를 낮출수 있을 뿐만 아니라 자동차의 전기에너지의 사용량을 줄일 수 있을 것이다.

In this study, we evaluated the scent intensity, emotional response, and EEG response according to the concentration of bergamot scent inhaled by young women whose average age was 18, and analyzed the correlation between these factors. The correlation between bergamot concentration (P, vol %) and odor intensity (I) was [I] = 1.22 + 0.86P (r2 = 0.99). The scent intensity of bergamot was about 3.8. The emotional response to the scent of bergamot was rated as pleasant, fresh, refreshing and feminine. Inhaling bergamot decreased the α waves in the brain and increased the θ, β, and γ waves. Additionally, the edge frequencies of the SEF50 and SEF90 were increased by 0.14 Hz to 0.59 Hz and 0.75Hz to 1.26 Hz respectively by bergamot. The odor intensity (concentration) and emotional response regarding bergamot showed a weak correlation with the amount of change in the edge frequency (ΔSEF50 and ΔSEF90). These results suggest that bergamot is a refreshing, feminine fragrance with an arousing effect that activates the brain.

Cortical activity was assessed in fashion-luxury consumers with a different sustainability orientation, in order to obtain insight on implicit dynamic towards eco-luxury products. Findings highlighted a strong emotional negative impact elicited by sustainability pictures implying a high engagement in luxury consumers when exposed to specific sensitive issues.

본 연구는 12주간의 핀수영 운동이 남자 청소년의 뇌파, 혈압 및 안정 시 심박수에 미치는 영향을 규명하는데 그 목적이 있다. 18명의 남자 청소년을 핀수영 운동집단 9명과 통제집단 9명으로 구성하였다. 핀수영 운동집단은 12주간 주3회 60분씩 핀수영을 실시하였다. 측정된 자료 중 뇌파변인들은 이원변량 반복측정 분산분석(Two way repeated measures ANOVA)에 의해 분석되었고 안정 시 심박수와 혈압 변인들의 분석은 공분산 분석(ANCOVA)과 대응표본 t-test(Paired t-test)를 실시하였다. 결과적으로 핀수영 집단에서는 Alpha파와 SMR파의 유의한 증가가 나타났고, Theta파의 유의한 감소가 나타났다. 통제집단에서는 Alpha파의 유의한 감소가 나타났다. Alpha파, Theta파와 SMR파 모두에서 시기와 집단 간 유의한 상호작용이 나타났다. 또한 핀수영 집단에서 안정 시 심박수, 수축 및 이완기 혈압의 유의한 감소가 나타났고 안정 시 심박수와 수축기 혈압에서 집단 간 유의한 차이가 나타났다. 하지만 이완기 혈압에서는 집단 간 유의한 차이가 나타나지 않았다. 이상의 결과로 12주간의 핀수영 운동은 청소년의 뇌파, 안정 시 심박수 및 혈압에 긍정적인 영향을 미친 것으로 보인다.

The paper presents consumer taste preferences of Indonesian coffee based on consumers’ EEG recording as biological response to elicit preferences towards several coffee products. The study employs applications of neuroscience methods to analyze the physiological choice process. Coffee consumers were asked to evaluate several Indonesian coffee products by using wireless EEG headset with 5 channels to collect EEG signals from participants’ brain areas that can give us a measure to estimate consumers’ preferences. Introduction Coffee is one of the most widely consumed beverages in Indonesia. Earlier, Irfan Anwar, Chairman of the Association of Indonesian Coffee Exporters and Industries (AICE), said domestic coffee consumption in Indonesia grows by an average of 8 percent per year. In 2017 total consumption may reach 350,000 ton. Coffee consumption is estimated to grow in Indonesia in the 2017/2018 season from 3.1 million bags of (60 kilogram) coffee to 3.3 bags of coffee. This growth is attributed to the establishment of new cafes and coffee corners (usually in the business centers and malls in the bigger cities) as well as the increasingly popular "coffee-drinking lifestyle" among the nation's expanding middle class segment. In Indonesia, Coffee ranks third in the table of food and beverage categories in terms of annual turnover and the value of the coffee market is growing rapidly. This results in increased competition on the market, as well as an increasingly extensive product offer. This, in turn, means that the consumer is often spoilt for choice when choosing one product from among many available on the market. The final decision as to the selection is determined by a complex set of factors such as the quality of the product, its brand, convenience and the method of preparation, as well as the price. “We are now drinking more quality coffee and we now have a better understanding of the quality that’s consumed in the developed world,” Irfan (Chairman of the Association of Indonesian Coffee Exporter - AEKI) said. When selecting among the coffee products , consumers are guided by their subjective evaluation, they rely on their own senses, experience, knowledge, trend and similar vague criteria. Therefore, the main objective of the article is an analysis of consumer taste preferences on several indonesian coffee in Indonesia market. Understanding their preferences will make it possible to develop a marketing strategy and product development for coffee industry in Indonesia market. To investigate the consumer’s taste preferences of several indonesian coffee, there is consumer neuroscience the emerging interdisciplinary field in marketing, that combines psychology, neuroscience, and economics to study how the brain is physiologically affected by stimuli (Lee, Broderick, & Chamberlain, 2007). The human brain activity as biological response of consumers will be monitored and provided evidence of how product cues related with sensory inputs (taste) can affect consumer’s attitude and offer the hope of characterizing choice process in coffee consumers (Ohme, Reykowska, Wiener, & Choromanska, 2009). Literature Review The Sense of Taste The beverage companies should create the products that appealing to the sense of taste. These impulses transmitted with sensory nerves to the relevant centers in the brain and interpreted. The taste of sense varies according to cultures, lifestyles, habits etc. (Carter, et al 2013). Human Brain The human brain is the command center for the human nervous system. It receives input from the sensory organs and sends output to the muscles. One way to address whether taste as stimuli can affects consumers’ preferences towards several indonesian coffee based on consumers’ brain response is to record from multiple brain regions simultaneously while subjects perform choice tasks (Lee et al.,2007). In this research we will focus on frontal lobe, temporal lobe, and parietal lobe area that can draw consumer attitude through sensory system process. Electroencephalography EEG is an emerging research tool for evaluating sensory responses to stimuli. It provides important insight into the electrical activity of the brain cortex that reflects true emotions and feelings during coffee product consumption (Knutson et al., 2007). Methodology For coffee taste preference, 30 participants were involved in this study by using non probability judgmental sampling. The participant, are coffee consumers and purchasers of coffee product. They must have normal vision, never had neurological nor psychiatric disturbances and right handed. Sample Preparation And Serving The sample preparation is using the SCAA method. Samples are roasted 24 hours before cupping and allowed to rest for at least 8 hours. The coffee samples are created according to the size of one serving cup and placed on the ziplock plastic packaging immediately so that the aroma does not subside. The sample should remain on the ziplock packaging until the brewing process. The particle grind size should be slightly coarser than normally used for paper filter with ratio of 8.25 grams of coffee per 150 ml of water. Following the rules from SCAA, cupping glasses is tempered glass with size between 207 ml to 266 ml, with a diameter of up to between 76-89 mm. The temperature of the water approximately 93℃ when poured into the ground coffee, water must wet the whole coffee grounds. Wait in about 8-10 minutes until the sample temperature reaches 71℃, then the evaluation should begin. Data Collection To test Neural Response of the participants who were conducting experimental tasks by Emotiv EPOC Neuro Head Set International 10/20 System (Figure 1). EEG was recorded for 3 minutes. Before the testing session, each subject received detailed instructions regarding the experiment. They were instructed to minimize body and brain movement as possible and asked to remain relaxed throughout the experiment. In order to ensure subjects understood the task requirements, pre-experiments were given to practice. During the EEG recording session, the subjects were seated in a comfortable chair in a quiet room. To start the session, using a click for warning signal, and 3 seconds later we used another click as imperative signal to order the experimenter inject the stimulus (Table 1). Everyone will try the coffee by cupping in accordance with the SCAA rules. The subject tastes the stimulus for 3 seconds. Stimulus was manually injected into the subject’s mouth via a hand-held syringe connected to a tube in quantities of 20 ml each time to know until the after taste of coffee. Each stimulus was repeated 3 times with the inter block interval 10-15 minutes. The data then recorded using OpenVIBE 0.13.0 and EPOC Panel Control software and then analyzed using MATLAB R2015a which complemented with EEGLAB. The electrodes were placed on F3 - F4 and P7 - P8 sites. All participants were instructed not to consume any food or beverage other than water min 12 hour before testing to minimize time-of-day effects by reducing pre-experimental activity. Result & Discussion The respondents were consists of 80% males and 20% females, their age were 18-63 years old. Majority of the respondents (85 %) spend between Rp 1.000.000 and Rp 20.000.000 per month, 9% of them spend less than Rp 1.000.000 per month, while the remaining 6% spend more than Rp 20.000.000 per month. Most of respondents were university students (81%) while the rest (19%) were private employee and entrepreneurs. Based on cross tabulations test, we found that age (X2=8.351, p=0.017<0.05) and monthly expense (X2=9.266, p=0.034<0.05) affects the Korean food consumptions, while gender and occupation were not. This results supported Ton Nu et al. (1996) and Saba (2001) findings that was shown food habits and taste preferences are mostly related to age. The primary aim of the current study was to expand the previous research by examining the effect of taste on cognitive performance for investigating taste of several indonesian coffee. We test 10 Indonesian coffee with different origin, roasting level, and post harvest process. Coffee origin: (1) Java Preanger; (2) Aceh Gayo; (3) Toraja Sapan; (4) Bali Kintamani, and (5) Wamena Papua Roasting level: (1) Light; (2) Medium; and (3) Dark Post Harvest Process: (1) Wet Method; (2) Semi Wet Method; (3) Dry / Natural Methods; and (4) Honey Method The results showed some electrophysiological reactions and the most preffered coffee was Bali Kintamani coffee with honey process and dark roasting level (p=0.02; p>0.00) and the least preffered coffee was Toraja Sapan Coffee with washed process and dark roasting level(p=0.00; p>0.00). Different coffee stimulus had shown different interest, relaxation, and stress level. The highest interest level coffee had shown an increase in relaxation level. And it was determined that slowing down on brain waves parallel to that case and participant keeps away the stress. In the other hand, when they drink interested coffee an increasing had been determined on their brain activity and wave changing connected to stress. According to these data, they felt relaxation when thay drink the liked coffee but they felt stress at the opposite. Conclusions The results of this study indicate that different coffee stimulus had shown different interest, relaxation, and stress level. Most of coffee consumer like Bali Kintamani coffee with honey process and dark roasting level. Since this study was a pilot, we would extend such investigation to further more participants having various food preferences.

To analyze the synergistic effects of applying lavender aroma to a footbath, we analyzed the EEG and emotional responses of footbath, lavender inhalation, and lavender footbath in women in their 30s. Foot baths reduced wave activation, wave and wave inactivation, and SEF50 and SEF90. The foot bath activated waves by about 66% compared to the background EEG, and reduced SEF50 and SEF90 by 0.43 Hz-0.68 Hz and 3.7 Hz, respectively. Lavender inhalation activated α, β, and γ waves at a concentration of 1% or more, and inactivated θ waves. As the concentration of lavender inhalation increased, α waves increased and β and γ waves decreased. Lavender foot bath activates θ waves and α waves, and inactivates β waves and γ waves. Compared with the background EEG, the lavender foot baths reduced SEF50 and SEF90, which are the median frequencies of EEG power, 0.5 Hz and 3.4 Hz, respectively. Lavender showed a positive emotional response when applied to inhalation and foot bath. Lavender showed a positive emotional response when applied to inhalation and foot bath. When the lavender was inhaled at the concentration of 1~10% and the lavender foot bath was applied, the average preference index (API) showed 0.64~0.66 and 3.6 ± 0.6, respectively. Lavender oil has a greater synergistic effect on emotional reactions when applied to an aromatherapy bath than by inhalation. Lavender decreased SEF50 and SEF90 as the API increased. A lavender footbath was superior to lavender inhalation in both emotional and EEG responses, and was more relaxed and calming than a footbath. These results suggest that the aroma foot bath method, in which lavender is applied to a footbath, is more effective in terms of providing relaxation and calming than a footbath or lavender inhalation aromatherapy.

The purpose of this study is to investigate the effects of oxides (caryophyllene oxide, eucalyptol and linalool oxide), one of the major ingredients of essential oils, on odor intensity, electroencephalography (EEG) response and emotional response. The subjects were women in their twenties. Inhalation concentrations of oxides were varied from 0.01 to 10%, and EEGs were collected by Quantitative EEG. The odor intensity and average preference index (API) of the oxides were ranked in the order of eucalyptol > linalool oxide > caryophyllene oxide. Eucalyptol is a refreshing and pleasant substance that activates the brain (activation of β and γ waves and spectral edge frequencies (SEF50 and SEF90)). Linalool oxide has a calm and soft substance (activation of θ, inactivation of α, β, and γ waves) at a low concentration (<0.1%), and a fresh smell at high concentration (inactivation β and activation of θ and γ). Caryophyllene oxides were evaluated as a substance that is comfortable, soft, calm and sedating, which deactivates the brain (activation of α, inactivation of β and γ). Oxide materials showed a positive correlation between the odor intensity and the SEFs. Each of the oxides showed unique characteristics in the areas of odor intensity, emotional response, API, and EEG. These results give us a better understanding of the properties of the pure materials that make up a fragrance, and provide useful information for the manufacture of fragrance products or aroma oil blends with enhanced specific functions.

This study is aimed to find out whether there is difference in the physiological change of a human body according to the illumination and color of interior space or not and to specify the effect of the condition of illumination and color, respectively on the attention. In order to do so, White and Green were selected for colors and 4,000k, 5,000k, and 6000k were done for color temperature, and then attention was identified. Examining the results, the more color temperature increased, the more attention improved (P < 0.05), and in the case of EEG, α wave decreased while performing the task of attention (P < 0.01), and β wave decreased more in Green than White in color condition, and it increased more in 4,000k than 5,000k and 6,000k (p < 0.05) in color temperature condition. To sum up, color condition didn't contribute to the attention much, in the case of color temperature, when it is 6,000k, it is judged that it helped to improve attention. It is considered that relaxation contributed to improving attention, as β wave and sympathetic nerve decreased in 6,000k (p < 0.05). It is judged that the relaxation of tensions which happened due to a beta wave and the reduction of sympathetic nervous system activity in 6,000k, a condition of high color temperature, contributed to the improvement of concentration. In further researches, it is intended that a test will be conducted for the subjects of different ages, and the correlation between color temperature and color stimulation and the influence of them on human body would be observed in subdivided, various test conditions through various color temperature and color stimulation.

본 연구는 구강 호흡이 뇌기능에 미치는 영향을 뇌전도(EEG : electroencephalogram)를 통해 관찰하고자 한다. 신체 가 건강한 12명의 피험자(남성: 6명, 여성: 6명, 나이: 21~27, 비흡연자)는 뇌파를 측정하기 위해 두피에 전극을 부착한 상태로 휴지기 상태에서 비강(Rest_N) 및 구강 호흡(Rest_M)을 수행하였고, 영어 대본을 사용한 청각언어자극이 주어 지는 상황에서 비강(Eng_N) 및 구강 호흡(Eng_M)을 수행하였다. 각각의 뇌파는 뇌의 기능별로 크게 4 구역(R1~R4)으로 나뉘어 FFT (Fast Fourier Transform)을 통해 각각의 채널별(e.g., Pf1 and Pf2) 및 주파수 대역별(α, β, γ, θ)로 절대 파워(Absolute Power) 비율을 살펴보았다. 도출된 결과에서는 Rest_N과 Rest_M 상태의 뇌파는 서로 유의미한 차이를 보이지 않았다. 비강 호흡 수행 중 청각언어자극이 주어졌을 때(Rest_N/Eng_N)의 뇌파를 비교했을 경우, 뇌파 의 활동이 휴지기 상태의 뇌파 활동보다 통계적으로 유의미하게 높은 것으로 나타났다. 하지만 같은 조건상에서 구강 호흡을 했을 때(Rest_M/Eng_M)는 비강 호흡을 실시했을 때와 달리 대부분의 뇌 구역과 주파수 대역에서 유의미한 차이가 나타나지 않았다. 동일한 조건의 자극에도 불구하고 구강 호흡을 하는 경우는 뇌기능의 변화가 비강 호흡과 다른 결과를 나타내었다.

목 적: 개인맞춤형 LED 조명이 눈 피로 감소에 미치는 영향을 ERP 분석을 통해 알아보고자 하였다. 방 법: 안질환이 없는 성인 남녀 23명을 대상으로 눈이 가장 편하다고 느끼는 LED학습조명의 색채를 자 각적으로 선택하게 하여 개인이 선택한 색채조명에서 2시간 동안 독서 후 EEG를 측정하였다. 개인맞춤형 LED 조명과 동일한 조도의 백색 LED 광원을 대조군 조명으로 선택하였다. 결 과: 개인맞춤형 LED 조명에서 Cz영역의 P3 성분의 정점 높이가 비교 조명에 비해 증가하는 경향을 보였지만 유의성은 없었다. 그러나 Pz영역에서 P3성분의 더 빠른 지연시간과 더 큰 정점 높이를 나타내어 눈 피로의 감소효과를 확인할 수 있었다(p<0.05). 결 론: 개인맞춤형 LED 조명이 눈 피로를 감소시키는데 도움이 되는 것을 확인 할 수 있었으며, 유익한 학습 환경을 제공하는데 도움이 되는 기초자료로 활용될 수 있으리라 생각된다.

The purpose of this paper is to investigate whether color as stimuli can affects underwear choice based on consumers’ EEG recording as biological response to elicit preferences towards underwear products. The study employs applications of neuroscience methods to analyze the physiological choice process. There are 20 underwear buyers were asked to evaluate several underwear colors (red, white, blue, brown, grey and black) by using wireless EEG headset with 6 channels to collect EEG signals from participants’ frontal, temporal and occipital brain areas that can gives us a measure to estimate consumers’ choice. The result indicated there was a clear and significant change (p < 0.05) of EEG brain waves activities of right and left hemisphere in the frontal (F3 and F4), temporal (P7 and P8), and occipital (O1 and O2) brain areas when participants indicated their preferred color. Additionally, based on the results female consumer prefers underwear which has red color while male consumer prefers white color. This research would essentially contribute to enrich marketing research method by using more advanced experimental designs rather than traditional marketing research methods.

본 연구는 상담심리학의 성격특성이론에 근거하여 좌·우뇌의 신경학적 비대칭성 및 두뇌 각 영역에서의 활성뇌파와 성격의 요인별 특성과의 관련성을 EEG측정을 통해 알아보고자 하였다. 이에 96명의 대학생들을 대상으로 8채널 EEG 장비를 이용하여 뇌파를 측정한 후 컴퓨터로 분석한 자료와 성격 5요인 질문지를 사용하여 조사한 자료를 통계 분석하 였다. 그 결과 전전두엽의 쎄타파 좌·우뇌비대칭이 클수록 성격요인 중 신경증이 높은 것으로 나타났고, 각 두뇌영역별 로는 전전두엽좌측의 쎄타파 활성이 클수록 신경증은 높고, 성실성은 낮아지는 것으로 나타났으며, 전두엽좌측의 베타 파 활성이 클수록 외향성과 개방성이 낮아지는 것으로 나타났다. 이러한 연구결과는 두뇌영역별 특정뇌파리듬의 활성 이 개인의 성격 및 심리적 특성에 유의미한 관련이 있음을 알 수 있게 한다. 기존의 연구들 대부분이 주로 알파파, 베타파 영역에서 성격과의 관련성에 대해 언급했던 것과 달리, 본 연구결과는 세타파가 성격특성과 관련이 있을 수 있음을 시사한다. 이러한 연구 결과를 토대로 두뇌관련 상담전략과 후속연구에 대해 제언하였다.

뇌와 근육은 상의 하달식 구조로 상지 운동 수행 과정에서 뇌파와 근전도 신호의 변화와 함께 기능적 연결성이 발생한다. 본 논문에서는 사용자가 상지 운동을 수행하였을 때의 뇌파와 근전도 신호에 대해 코히어런스 방법을 적용하 여 운동 의도 여부에 따른 뇌와 근육간의 연결성 차이를 규명하고자 한다. 상지 운동을 수행하는 과정에서 운동 피질 영역의 뇌파는 뮤 리듬(mu rhythm, 8~14 Hz)과 베타 리듬(beta rhythm, 15~30 Hz)에서 활성화 되며, 근전도 신호는 베타 리듬과 파이퍼 리듬(piper rhythm, 30~60 Hz)에서 활성화 된다. 뇌파와 근전도 신호간의 코히어런스 분석 결과 운동 의도를 포함한 능동 운동 수행 시 수동 운동을 수행하였을 때 보다 유의미한 차이로 높은 코히어런스 계수가 확인되었다. 이는 인지적 반응과 근육의 움직임 사이의 코히어런스 관계로 운동 의도가 포함된 상지 운동 수행 과정에서 의 뇌와 근육간의 연결성을 해석할 수 있었다. 운동 의도에 따른 뇌-근육간의 코히어런스 특징을 이용한다면 재활 기기 사용자의 운동 의도에 따라 피드백이 필요한 재활 훈련 시스템 설계에 도움이 될 수 있을 것으로 사료된다.

목 적: 본 연구는 스마트폰을 이용한 근거리 시작업 후 눈피로와 관련된 EEG(뇌파)의 특성을 알아보고 눈 피로의 객관적 지표로서 활용가능성을 확인하고자 한다. 방 법: 20-30세 남녀 대학생 24명을 대상으로 2시간 동안 스마트폰을 통한 근거리 시작업 전 과 후의 EEG를 측정하였다. EEG를 측정하기 위해 전형적인 10-20 방법을 참조하여 4개 채널 의 전극을 Fp1, Fp2, Pz, Oz 위치에 부착하였으며, 측정장비는 (주)락싸 4채널 (QEEG LXE-3204)를 사용하였다. 실험이 시작되면 피험자는 모니터의 흰 바탕화면을 응시하도록 하였 으며, 화면우측 중앙에 검정색점이 1초간 제시 후 사라진 다음 “루”글자가 화면 좌측 중앙에 2초간 나타나도록 하여 안구의 단속운동이 이루어지도록 하였다. 피험자가 실험에 임하고 있음 을 확인하기 위해 피험자에게 “루”글자가 나타났다 사라지면 스페이스바를 가능한 한 빨리 눌 러서 반응하도록 하였다. 화면에 제시된 자극에 대한 키보드 반응이 1초 이상 걸린 시행은 분 석에서 제외하였다. 또한 앞선 시행이 다음시행에 미치는 영향을 방지하기 위해서 “루”글자가 사라진 후 검정색점 이 나타나기까지 간격을 7초로 유지하였다. 결과: 4개 채널 각각에 대하여 “루”글자가 나타날 때를 기준으로 획득된 조건별 50회의 데이 터에 대해 조건별 평균 파형을 계산하여 ERP분석을 수행한 결과, Pz와 Oz채널에서 P3 성분의 실험조건 간 차이가 시각적으로 확인되었다. Pz 채널과 Oz 채널 모두 정점이 나타나는 시간은 두 조건에서 모두 비슷하였으나 P3성분의 정점크기가 스마트폰을 이용한 근거리 시작업 후에 상대적으로 작게 나타났다(p<0.05). 결론: 시각과 연관된 후두엽 부위의 Pz와 Oz 모두에서 근거리 시작업 후 눈피로가 증가하는 요인으로 유추해 볼 수 있는 P3성분의 상대적으로 낮은 정점크기를 확인 할 수 있었다. 이는 눈 피로와 관련된 객관적 지표로서 활용이 가능할 것이라 생각된다.