足部への異なる温度感覚刺激が左右の前頭前野の脳血流量に及ぼす影響  [in Japanese] Effect of Sensory Stimulation of the Feet by Different Temperatures on Cerebral Blood Flow in the Left and Right Prefrontal Cortex  [in Japanese]

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Author(s)

    • 前田 耕助 Maeda Kosuke
    • 首都大学東京大学院人間健康科学研究科看護科学域 Department of Nursing Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
    • 習田 明裕 Shuda Akihiro
    • 首都大学東京大学院人間健康科学研究科看護科学域 Department of Nursing Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University

Abstract

 足部への異なる温度刺激が前頭前野の脳血流量に及ぼす影響を明らかにすることを目的とした. 健常成人25名の足部に40℃, 16℃, 30℃の温度刺激を180秒間実施し, 近赤外分光法による左右の前頭前野の脳血流量の変化と温度の感じ方, 気持ちよさの主観的評価を行った. 結果, 左前頭前野の群内比較では, 40℃の温度刺激は安静時にくらべて温度刺激開始から120秒で脳血流変化量が増加し (<i>P</i><0.05), 群間比較では, 開始から60秒と120秒で40℃の温度刺激は16℃の温度刺激にくらべて大きかった (<i>P</i><0.05). 一方右前頭前野は変化を認めなかった. 主観的指標では, 40℃は「温かい」感覚刺激で「快感情」を伴い, 16℃は「冷たい」感覚刺激で「快ではない感情」を伴った. これらより足部への「温かい」感覚刺激による「快感情」は, 「冷たい」感覚刺激による「快ではない感情」より左前頭前野の脳血流量を増加させるが, 右前頭前野の脳血流量に変化を及ぼさないことが明らかとなった.

 The aim of this study was to clarify the effect of sensory stimulation of the feet by different temperatures on cerebral blood flow in the prefrontal cortex. The feet of 25 healthy adults were stimulated for 180 sec in foot baths set at temperatures of 40℃, 16℃ and 30℃. Changes in cerebral blood flow in the left and right prefrontal cortex were measured using near-infrared spectroscopy, and the feeling experienced at each temperature and the pleasantness of the temperature were subjectively evaluated. In intragroup comparisons, cerebral blood flow in the left prefrontal cortex increased 120 sec from the start of immersing the feet in the 40℃ water bath as compared with baseline levels (<i>P</i><0.05). Intergroup comparisons also showed that cerebral blood flow in the left prefrontal cortex was greater at 60 sec and 120 sec from the start of immersion of the feet in the 40℃ water bath than in the 16℃ water bath (<i>P</i><0.05). However, no change was seen in cerebral blood flow in the right prefrontal cortex. In the subjective evaluation, 40℃ was considered a “warm” sensory stimulus with a “pleasant feeling,” while 16℃ was considered a “cold” sensory stimulus with an “unpleasant feeling.” These results demonstrate that the “pleasant feeling” resulting from “warm” sensory stimulation of the feet causes cerebral blood flow in the left prefrontal cortex to increase more than the “unpleasant feeling” resulting from “cold” sensory stimulation. These results also show that sensory stimulation of the feet do not produce any changes in cerebral blood flow to the right prefrontal cortex.

Journal

  • Japanese Journal of Nursing Art and Science

    Japanese Journal of Nursing Art and Science 17(0), 61-70, 2018

    Japanese Society of Nursing Art and Science

Codes

  • NII Article ID (NAID)
    130007437255
  • Text Lang
    JPN
  • ISSN
    1349-5429
  • Data Source
    J-STAGE 
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