Evaluation of Stressed Condition using Pupillary Responses

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  • IIJIMA Atsuhiko
    Institute of Science and Technology, Niigata University Institute of Medical and Dental Sciences, Niigata University
  • KOSUGI Takeshi
    Institute of Science and Technology, Niigata University
  • KIRYU Tohru
    Institute of Science and Technology, Niigata University
  • MATSUKI Kosuke
    Institute of Science and Technology, Niigata University
  • HASEGAWA Isao
    Institute of Medical and Dental Sciences, Niigata University
  • BANDO Takehiko
    Institute of Medical and Dental Sciences, Niigata University

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Other Title
  • ストレス状態の推定に有効な瞳孔反応パラメータの探索
  • ストレス ジョウタイ ノ スイテイ ニ ユウコウ ナ ドウコウ ハンノウ パラメータ ノ タンサク

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Abstract

We investigated an effective method for evaluating chronic stress in humans by using pupillary responses to visual motion stimuli. Nine subjects watched movies including 18 short video movies (duration:10s in each). The pupil diameter responding to the movies were measured with a video oculography and calculated the difference between the maximum and minimum pupil diameters responded to the stimuli was highly correlated with the salivary α-amylase (R=-0.76, p=0.018) activities. The sympathetic nervous system is activated by a stress and secretes the salivary amylase. We found that there were some autonomic different responses in the stress subject from pupillary and salivary observations. These phenomena were clearly observed under the visual movie stimulation which was able to reveal the steady pupillary responses.

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