ヤマナカ ケンタロウ    YAMANAKA Kentarou
   山中 健太郎
   所属
食健康科学部 健康デザイン学科
 
生活機構研究科 生活科学研究専攻
 
生活機構研究科 生活機構学専攻
 
女性健康科学研究所 所属教員
   職種
教授
言語種別 日本語
発行・発表の年月 2013/12
形態種別 大学・研究所等紀要
査読 査読あり
標題 健康な大学生のIowa Gambling Task(IGT)における意志決定
執筆形態 共著
掲載誌名 学苑(生活科学紀要)
出版社・発行元 昭和女子大学
巻・号・頁 878,1-11頁
著者・共著者 石川史子 仲前朋美 村端舞 山中健太郎
概要 An impaired performance on Iowa gambling task (IGT) comes when participants prefer high immediate gain despite higher future losses. Previous studies demonstrated that obese individuals and patients with eating disorder, characterized as they are a preference for high immediate reward (excessive food intake) despite higher future punishment (weight gain), showed deficits on the IGT. Therefore, we hypothesized that, even in healthy (normal-weight) participants, performance on IGT is related to their body size, daily eating behavior, emotional and physiological states. In this study, we addressed the relationships between a learning pattern of decision-making on the IGT and daily eating behavior (Dutch Eating Behaviour Questionnaire: DEBQ), subjective states (visual analog scale for appetite and 9×9 Affect Grid for mood and arousal states), body size (weights, BMI, and %fat), and physiological indices for autonomic and prefrontal functions in 15 healthy university students (8 female, 7 male). Autonomic and prefrontal functions were assessed by power spectrum of heart rate variability and asymmetry in alpha-band electroencephalographic power at rest before the IGT. Consequently, a subgroup of participants (5/15) who have moderate sympathetic activities and prefrontal negative inhibitory tendencies can learn successfully to make advantageous choices on the IGT. The other subgroup (5/15) who have hyper-sympathetic activities and prefrontal positive approach tendencies learned to make disadvantageous choices on the IGT. Moreover, in the successful learning group, body size and restrained and emotional eating score tended to be smaller, subjective appetite score tended to be higher, than those in the less learning group. A third subgroup (5/15) who have low sympathetic activities cannot learn to make advantageous or disadvantageous choices on the IGT. Overall results are consistent with previous studies suggesting that autonomic and prefrontal function is related to IGT performance even in healthy participants.