Cardiac Autonomic Nervous Activity Interaction under Mental Stress : A Study Using the Corrected Heart Rate Variability Indexes

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  • メンタルストレス時における心臓自律神経活動 : 補正後の心拍変動指標による評価
  • メンタルストレスジ ニ オケル シンゾウ ジリツ シンケイ カツドウ ホセイ ゴ ノ シンパク ヘンドウ シヒョウ ニ ヨル ヒョウカ

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The purposes of this study are to evaluate the effect of the posture and the respiratory rate on the heart rate variability (HRV) indexes during sitting (ExperimentI), and to assesss the effect of mental stress on cardiac autonomic nervous activity by using the corrected HRV indexes (ExperimentII). Since the effect of respiratory rate that had kept influencing the HRV indexes during sitting was the same in the supine posture, the HRV correction formula by respiratory rate in the supine posture were found possible to use to correct of the HRV indexes, even in sitting as well. The mental stress was carried out by body contacts with others, and its effect was evaluated at the corrected HRV indexes in sitting. As a result, the mental stress decreased the heart rate and increased the corrected HF, representing that mental stress causes the increase of the cardiac parasympathetic nervous activity.

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