• Title, Summary, Keyword: arousal

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Detection of Arousal in Patients with Respiratory Sleep Disorder Using Single Channel EEG (단일 채널 뇌전도를 이용한 호흡성 수면 장애 환자의 각성 검출)

  • Cho, Sung-Pil;Choi, Ho-Seon;Lee, Kyoung-Joung
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.55 no.5
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    • pp.240-247
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    • 2006
  • Frequent arousals during sleep degrade the quality of sleep and result in sleep fragmentation. Visual inspection of physiological signals to detect the arousal events is cumbersome and time-consuming work. The purpose of this study is to develop an automatic algorithm to detect the arousal events. The proposed method is based on time-frequency analysis and the support vector machine classifier using single channel electroencephalogram (EEG). To extract features, first we computed 6 indices to find out the informations of a subject's sleep states. Next powers of each of 4 frequency bands were computed using spectrogram of arousal region. And finally we computed variations of power of EEG frequency to detect arousals. The performance has been assessed using polysomnographic (PSG) recordings of twenty patients with sleep apnea, snoring and excessive daytime sleepiness (EDS). We could obtain sensitivity of 79.65%, specificity of 89.52% for the data sets. We have shown that proposed method was effective for detecting the arousal events.

Measurement and Analysis of Arousal While Experiencing Light-Field Display Device

  • Choi, Hyun-Jun;Kim, Noo-Ree;Park, Hyun-Rin
    • Journal of information and communication convergence engineering
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    • v.18 no.3
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    • pp.188-193
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    • 2020
  • In this paper, we examine whether the 3D image experience through a light-field display device showed the difference in the arousal of the user compared with the 2D image experience. For our experiment, the Looking GlassTM (LG) was used as a lightfield display device that provided 3D images, and 2D images were provided by digital and printed images. The subject's facial behavior during each media experience was recorded for analysis and the degree of arousal was measured by FaceReaderTM. As a result, the first image presented in the first order among the three kinds of images showed that there was a statistical difference in the degree of arousal between the three media. However, no significant differences were found between the three media in the other images. This may be because the arousal did not increase from the experience of the second image through the LG, owing to habituation. In conclusion, the 3D imaging experience may appear in the beginning, but does not continue.

Effect of Emotional Incongruence in Negative Emotional Valence & Cross-modality (교차 양상과 부정 정서에서의 정서 불일치 효과에 따른 기억의 차이)

  • Kim, Soyeon;Han, Kwang-Hee
    • Science of Emotion and Sensibility
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    • v.17 no.3
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    • pp.107-116
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    • 2014
  • In the current study, it is suggested that when two emotions are presented through cross-modality, such as auditory and visual, incongruence will influence arousal, recognition, and recall of subjects. The first hypothesis is that incongruent cross-modality does not only increase arousal more than the congruent, but it also increases recall and recognition more than congruent. The second hypothesis is that arousal modulates recall and recognition of subjects. To demonstrate the two hypotheses, our experiment's conditions were manipulated to be congruent and incongruent by presenting positive or negative emotions, visually and acoustically. For dependent variables, we measured recall rate and recognition rates. and arousal was measured by PAD (pleasure-arousal-dominance) scales. After eight days, only recognition was measured repeatedly online. As a result, our behavioral experiment showed that there was a significant difference between arousal before watching a movie clip and after (p<.001), but no difference between the congruent condition and incongruent condition. Also, there was no significant difference between recognition performance in the congruent condition and incongruent condition, but there was a main effect of the clips' emotions. Interestingly after analyzing recognition rates separately depending on clips' emotions, there was a significant difference between congruent and incongruent conditions in the only negative clip (p= .044), not in the positive clip. In a detailed result, recognition in the incongruent condition is more than in the congruent condition. Furthermore, in the case of recall performance, there was a significant interaction between the clips' emotions shown in the clips and congruent conditions (p=.039). Through these results, the effect of incongruence with negative emotion was demonstrated, but an incongruent effect by arousal could not be demonstrated. In conclusion, in our study, we tried to determine the impact of one method to convey a story dramatically and have an effect on memory. These effects are influenced by the subjects' perceived emotions (valence and arousal).

A Study on Changes in Human Sensibility Evoked by Imagination (상상으로 유발된 감성 변화에 관한 연구)

  • Chung, Soon-Cheol;Min, Byung-Chan;Jun, Kwang-Jin;Lee, Bong-Soo;Yi, Jeong-Han;Kim, Chul-Jung
    • Journal of the Ergonomics Society of Korea
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    • v.21 no.3
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    • pp.35-46
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    • 2002
  • In this study, emotion changes were induced by four imaginations- pleasantness, unpleasantness, arousal, relaxation and it was examined using subjective evaluation and analysis of the physiological signals of the central and autonomic nerve systems whether the intended emotions were appropriately achieved, and whether these emotion changes could be distinguished from the analysis of physiological signals. Each of the four imaginations was implemented on 32 subjects for 30 seconds, while that Electroencephalogram (EEG), Eelectrocardiogram (RSP) were measured, and a subjective evaluation was implemented following the completion of the measurement. The analysis of the subjective evaluation revealed that the subjects underwent the four clearly differentiated imaginations, and the pleasantness level was classified into four imagination stages, pleasantness>relaxation>arousal=comfort>unpleasantness, and arousal level was classified into four imagination stages in the order of arousal>unpleasantness${\approx}$pleasantness>comfort>relaxation. The analysis of the EEG revealed that three stages of pleasantness level, pleasantness>relaxation=arousal=comfort>unpleasantness were classified from the values of ${\alpha}/{\alpha}+{\beta}\;and\;{\beta}/{\alpha}+{\beta}$, and about tour distinguishable stages of arousal level were obtained from the autonomic nervous system responses following the order of arousal>unpleasantness${\approx}$pleasantness> comfort> relaxation. It was found that intended emotion could be induced from the imagination, and these induced emotion changes could be differentiated using the physiological signals of the EEG and autonomic nervous system.

The Study on Relationship of Arousal, Pleasure, and Behavior Intention from a Store Environment: Focused on Moderating Role of Shopping Value (점포환경으로 인한 환기와 즐거움, 행동의도 간의 관계에 대한 연구: 쇼핑 가치에 의한 조절변수를 중심으로)

  • Lee, Jong-Ho;Oxk, Jung-Won;Park, Hyo-Hyun
    • Journal of Distribution Research
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    • v.13 no.4
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    • pp.21-46
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    • 2008
  • The purpose of this study in to investigate the high-arousal has a direct effect on the pleasure. Especially this paper focused on the moderating effect of shopping value(hedonic vs utilitarian). Namely, interaction effect of arousal and shopping value has a direct effect on the pleasure. We also examine the pleasure impact on the behavior intention. The main results of this article are as follow; First, it was proved that high arousal can influence on pleasure. Second, it was also proved the interaction effect of arousal and shopping value can influence on arousal. Third, it was proved the pleasure can have a positive influence on behavior intention.

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Correlation Between Sensory Modulation and Arousal : A Literature Review (감각조절과 각성의 관련성에 대한 문헌고찰)

  • Hong, Eunkyoung
    • The Journal of Korean Academy of Sensory Integration
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    • v.13 no.2
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    • pp.75-84
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    • 2015
  • Objective : The aim of this study was to provide mechanism information of a link between arousal and sensory modulation to increase understanding of neurophysiological study. Subject : Optimal arousal state of a child is an important issue in sensory integration therapy. Limbic system and reticular formation are related to sensory modulation by sensory input. Sensory inputs processes from reticular formation to cortex via ascending reticular activation system for moderate arousal. A lot of neurotransmitters such as cholinergic neurons and monoamin neurons help this processes. Mechanism of arousal was measured by functions of central nervous system (CNS) and autonomic nervous system (ANS) using objective tools such as an electroencephalogram (EEG) and electrodermal responses. Functions of CNS and ANS showed differences between normal children and children with disabilities. Optimal sensory input using sensory integration therapy for children with disabilities helps to act reticular formation, limbic system, and cortex and to maintain appropriate arousal. Conclusion : Such quantitative studies by using neurophysiological methods provide evidence for sensory integration therapy.

Relationship between Arousal Indices and Clinical Manifestations in Patients Who Performed Polysomnography (수면다원검사를 시행한 환자들의 각성지수와 임상양상과의 관계)

  • Kim, Sung Kyoung;Lee, Sang Haak;Kang, Hyeon Hui;Kang, Ji Young;Kim, Jin Woo;Kim, Young Kyoon;Kim, Kwan Hyoung;Song, Jeong Sup;Park, Sung Hak;Moon, Hwa Sik
    • Tuberculosis and Respiratory Diseases
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    • v.67 no.3
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    • pp.183-190
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    • 2009
  • Background: Repeated arousals during sleep have been known to be associated with excessive daytime sleepiness and cardiovascular complications. We investigated the relationship between arousal indices and clinical parameters. Methods: We retrospectively reviewed medical records of 41 patients who performed polysomnography for a diagnosis of obstructive sleep apnea syndrome. We defined total arousal index (TAI) as the number of arousals per hour and respiratory arousal index (RAI) as the number of arousals associated with apnea or hypopnea per hour. Results: There were significant positive correlations between arousal indices and apnea-hypopnea index (AHI) (RAI vs. AHI, r=0.958, p<0.001; TAI vs. AHI, r=0.840, p<0.001). RAI and mean oxygen saturation showed a significant negative correlation with each other (r=-0.460, p=0.002). TAI revealed a significant positive correlation with mean systolic blood pressure (MSBP) and mean diastolic blood pressure (MDBP) (TAI vs. MSBP, r=0.389, p=0.014; TAI vs. MDBP, r=0.373, p=0.019). There was no significant correlation between arousal indices and parameters of sleepiness. RAI had a significant positive correlation with body mass index (BMI) and neck circumference (NC) (RAI vs. BMI, r=0.371, p=0.017; RAI vs. NC, r=0.444, p=0.004). When partial correlation analysis was performed to adjust for other variables, there was significant correlation between RAI and AHI (r=0.935, p<0.001). Conclusion: This study shows that respiratory arousal index could be a useful index reflecting of severity of obstructive sleep apnea syndrome. Arousal during sleep would be concerned in the development of cardiovascular complication of obstructive sleep apnea. And some anthropometric factors would contribute to the development of arousals during sleep. Further studies are needed to clarify any cause-effect relationship.

A Comparative Study of Emotion Using the International Affective Picture System (국제정서사진체계를 사용하여 유발된 정서의 측정: 비교문화적 타당성 연구)

  • 이경화;김지은;이임갑;손진훈
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • pp.220-223
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    • 1997
  • The International Affective Picture System (IAPS) developed by Lang and colleagues[1] is widely used in studies relating a variety of physiological indices to subjective emotions. In this study we investigated whether the IAPS can be used for Koreans without significant cultural biases in their subjective emotional reactions. Thirty IAPS picture slides were presented to a group of 52 college students and different 30 slides with similar 3 dimensional emotion ratings to another group of 42 students. Fof each slieds with exposal time of 8sec, subjects were asked to rate on the Semantic Differential Scale (SDS) and Self-Assessment Manikin (SAM) in the 3 dimensions of pleasure valence, arousal, and domensions of pleasure valence, arousal, and dominance. Fnctor analysis was done for SDS ratings, and correlations of SDS and SAM were calculated. Eighteen bipolar adjective were grouped into 3 dimensions of pleasure, arousal, dominance showing good agreement with previous study. SAM were calculated. Eighteen bipolar adjectives were grouped into 3 dimensions of pleasure, arousal, dominance showing good agreement with the previous study. SAM ratings were highly corrlated with two of the 6 SDS adjective pairs associated with the pleasure and dominance dimensions, but not with those associated with arousal dimension suggerting some cultural differences.

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Portable arousal control system using electrodermal activities (피부 전기활동을 이용한 휴대형 각성도 측정 및 제어 시스템)

  • Ko, Han-Woo;Lee, Woan-Kyu;Kim, Youn-Ho
    • Journal of Sensor Science and Technology
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    • v.5 no.3
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    • pp.55-64
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    • 1996
  • To control arousal level using physiological index, electrodermal activity signal was detected and separated into skin impedance level and response. Arousal state decision and control algorithm was studied to implement and evaluate real time portable arousal control system. The implemented system can detect and control arousal state from initial drowsy state. This system will be applicable to the evaluation of the effect of warning signal, driver's drowsy detecting system, and sleep study.

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Predictors of Sexual Desire, Arousal, Lubrication, Orgasm, Satisfaction, and Pain in Women with Gynecologic Cancer (부인암 여성의 성 욕구, 성 흥분, 질분비, 절정감, 성 만족도, 성교 통증에 대한 심리사회적 예측요인)

  • Chun, Na-Mi
    • Journal of Korean Academy of Nursing
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    • v.40 no.1
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    • pp.24-32
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    • 2010
  • Purpose: This study was done to identify psychosocial factors that might be predictive of sexual desire, arousal, lubrication, orgasm, satisfaction, and pain in women with gynecologic cancer. Methods: Two hundred and twelve women with cervical, ovarian, or endometrial cancer completed questionnaires on the Female Sexual Function Index including sexual desire, arousal, lubrication, orgasm, satisfaction, and pain, and data on their psychosocial factors including body image, sexual attitude, sexual information, depression, and marital intimacy. Stepwise multivariable regression analysis was performed to explore psychosocial predictors of women’s sexual function domains. Results: Predictors were identified as sexual attitude, depression, sexual information, and body image for sexual desire; sexual information, depression, and sexual attitude for sexual arousal; sexual information, marital intimacy, and depression for lubrication; sexual information, marital intimacy, depression, and body image for orgasm; marital intimacy, sexual information, sexual attitude, and depression for satisfaction; sexual information, depression, and marital intimacy for pain. Conclusion: The results indicate that women’s sexual function needs to be approached to domains of female sexual function psychosocially as well as to general sexual function. These factors should be considered in future interventions to positively promote sexual function in women with gynecologic cancer.