局所皮膚冷却時の温度感覚と脳波の変化:—男女差および冷え症の影響—  [in Japanese] Changes in Thermal Sensations and Electroencephalography during Local Skin Cooling:—Differences between Males and Females and Effects of a Cold Constitution—  [in Japanese]

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Abstract

<p>健康な男性9名と女性9名との間で体の冷えに係る愁訴の程度に差のないように調整した上で,局所皮膚冷却に対する温度感覚と脳波(EEG)の応答に男女差があるか否かを検討した.また,全被験者を冷え症者と非冷え症者とにグループ化し,2グループ間でこれらの生理的応答の違いについて比較した.両側足背部の局所温度を33℃から23℃へ低下させてから再び33℃へ加温する冷却-再加温負荷を2回繰り返した.温度感覚の測定には視覚的アナログ尺度を用い,EEGは頭頂部で測定し,4周波数帯(<i>θ</i>波,<i>α</i>1波,<i>α</i>2波,<i>β</i>波)のスペクトルパワーを解析した.その結果,足背部皮膚冷却刺激に対する温度感覚応答には男女差がみられなかったが,EEGの<i>θ</i>波パワーの変化に性差がみられた.また,冷え症者は皮膚冷却刺激に対して高い冷覚感受性を示し,非冷え症者との脳活動の違いは低周波数<i>α</i>波パワー応答の差として表出することが示唆された.</p>

<p>In the present study, we investigated whether the responses of thermal sensations and electroencephalography (EEG) to local skin cooling differ between male and female subjects after adjusting for the degree of coldness complaints in daily life. Subjects were classified into two groups: subjects with a cold constitution and normal control subjects, and their physiological responses were compared. Local skin temperatures in the dorsal feet were decreased from 33°C to 23°C and the feet were then rewarmed to 33°C. This local thermal loading was repeated twice. Thermal sensations were rated using a visual analogue scale, EEG was performed at the parietal area (C3, C4), and the spectral power of 4 frequency bands (the <i>θ</i> wave, <i>α</i>1 wave, <i>α</i>2 wave, <i>β</i> wave) was analyzed. The responses of thermal sensations to local thermal loading did not significantly differ between males and females; however, sex differences were observed in the change in <i>θ</i> wave power on EEG. In addition, subjects with a cold constitution were more sensitive to cold sensations during the skin cooling stimulation than normal control subjects, and differences in brain activity were shown as different responses in the low-frequency <i>α</i> wave power.</p>

Journal

  • JAPANESE JOURNAL OF BIOMETEOROLOGY

    JAPANESE JOURNAL OF BIOMETEOROLOGY 55(1), 9-18, 2018

    Japanese Society of Biometeorology

Codes

  • NII Article ID (NAID)
    130007440205
  • NII NACSIS-CAT ID (NCID)
    AN00193590
  • Text Lang
    JPN
  • ISSN
    0389-1313
  • NDL Article ID
    029167389
  • NDL Call No.
    Z19-618
  • Data Source
    NDL  J-STAGE 
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