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The effect of pleasant olfactory stimulation on physiological responses
( Yeon Kyu Kim ),( Shigeki Watanuki ) 한국감성과학회 2001 춘계학술대회 Vol.2001 No.-
Using ordors with the different concentration of essential oils, we studied the effect of a pleasant olfactory stimulation on physiological responses. we examined psychological response, mental task and changes in cardiac, immunity and EEG in responses to 150times solution (feel easily) and 500times solution (feel with difficulty) which of essential oil (called PCK) were diluted in propylene glycol, and neutral (water). The 150times solution that was felt pleasant produced significant differences (p<0.05) in relative power change of beta activity in the left frontal region (Fp1, F3, F7) of the brain, and heart rate (HR) deceleration after mental task. These results are consistent with substantial research that has documented cardiac and EEG responses to pleasant stimuli. What is more, 150times solution increased the concentration of s-IgA know as an index of immunity.
Oxytocin Receptor Gene Polymorphism and Brain Activity
( Damee Choi ),( Natsumi Minote ),( Fumi Kishida ),( Shigeki Watanuki ) 한국감성과학회 2015 추계학술대회 Vol.2015 No.-
Oxytocin is an important neuroactive hormone for social behaviors. Previous studies have reported that genetic variation in the oxytocin receptor is associated with individual differences in response to social cues. However, it remains unclear whether the oxytocin receptor gene modulates responses to nonsocial cues, such as inanimate objects. Therefore, in the present study, we investigated the relationship between the oxytocin receptor gene rs53576 and event-related potential (ERP) responses evoked by watching images depicting either humans or inanimate objects. Eighty-three Japanese men (GG, n = 10; GA, n = 43; AA, n = 30) participated in this study. We found that GG/GA individuals displayed greater N1 and early posterior negativity (EPN) than AA individuals regardless of image content (human or object). This suggests that GG/GA individuals have a tendency to respond to emotional stimuli more automatically than AA individuals, even when stimuli do not contain social cues. GG/GA individuals also showed higher self-reported trait empathy, in accordance with previous studies. These results suggest that genetic variation in the oxytocin receptor gene might account for individual differences in emotional processing of both social cues and nonsocial cues. In conclusion, our findings suggest that genetic variation in the oxytocin receptor gene modulates a wide range of social and emotional behaviors.
( Un Jeng Kim ),( Yongho Kwak ),( Jeongsoo Han ),( Jin Hun Sohn ),( Shigeki Watanuki ),( Bae Hwan Lee ) 한국감성과학회 2014 춘계학술대회 Vol.2014 No.-
This study aims to explore and identify semantics of emotions evoked in the cognitive process of human beings when they are stimulated by different physical signals presented on information displays. To do this, we compared emotion maps driven from two independent experimental setups. Kansei engineering approaches using semantic differential method were adopted to draw the emotion maps. In each experimental setup, different set of subjects were asked to evaluate levels of semantic associations between physical stimuli and delivering information. The information to deliver was defined using sets of adjectives that are useful to describe various states of process in or out of control. Distinctive earcons and hapticons with different design parameters were given as the physical stimuli in each experiment. Factor analysis was applied to determine the dimensions, locations of adjectives and stimuli on each emotion map. The results showed that people`s emotions corresponding to given physical stimuli can be abstracted into 2 dimensions when they are expressed using the set of adjectives in the experiments.
Un Jeng Kim,Yongho Kwak,Jeongsoo Han,Jin-Hun Sohn,Shigeki Watanuki,Bae Hwan Lee 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5
The information on the spatial differences in the active regions of the nucleus of the solitary tract (NST) may be essential to understand the effect of salts. In the present study, we aimed to investigate the spatial distribution patterns of cation-specific active regions in the NST. For this purpose, the anterior part of the tongue of urethane-anesthetized Sprague-Dawley rats (n = 25) was stimulated with artificial saliva (Control), 0.5 M and 1.0 M NaCl, 0.5 M KCl, and 0.3 M NH4Cl. The 3D-position of c-Fos-like immunoreactive (cFLI) cells in the NST was determined. The cFLI cells were observed throughout the NST, irrespective of the stimulus; however, the intermediate-medial-central regions of the NST had a higher number of cFLI cells than the other regions after all taste stimulations. The analysis of images revealed that the activated regions in the NST were significantly different depending on the cations. Therefore, these results suggest that there are cation-specific regions in the NST.
Effect of empathy trait on attention to faces
Damee Choi,Takayuki Nishimura,Midori Motoi,Yuka Egashira,Riko Matsumoto,Shigeki Watanuki 대한인간공학회 2014 대한인간공학회 학술대회논문집 Vol.2014 No.5
To extend knowledge of relationship between empathy trait and attention to face, the present study aimed at investigating relationship between self-reported empathy trait and N170 elicited by five facial expressions (happy, angry, surprised, afraid, and sad). Twenty-two participants (12 males and 10 females) discriminated those five facial expressions from emotionally neutral faces under an oddball paradigm while event-related potentials (ERP) were recorded. The empathy trait of participants was measured using the Interpersonal Reactivity Index (IRI, Davis, 1980). The results revealed that participants with high IRI score showed more negative amplitude of N170 (140 to 200 ms after stimulus onset) than those with low IRI score at posterior temporal area in response to happy, angry, surprised, and afraid faces. The present study thus suggests that people with high empathy trait pay attention to faces more than those with low empathy, in very early stage of processing of face with happy, angry, surprised, and afraid expressions. Furthermore, this also indicates that empathy trait is related with attention processing of not only negative expressions (angry and afraid) but also positive (happy) and ambiguous expression (surprised).