• 作者： 黃廷飛；余玉超；彭英毅
• 作者服務機構： 國立臺灣大學醫學院生理學科; 私立臺北醫學院生理學科
• 中文摘要： 貳拾名健康年青男人接受臉部浸水實驗，使用光電體積描記法記錄指頭、耳垂及趾頭血流變化。當臉部浸水立即心跳減慢，指頭血流顯著減低，但耳垂及趾頭血流無顯著變化。心跳減慢及血管縮小反應在臉部浸水較在空中呼吸暫停為顯著，而在乏隡乏(Valsalva)法住口用力呼氣動作時，心跳稍增加，血管縮小反應卻很明顯。 另外動物實驗，用老鼠頭部浸水立即有明顯徐脈及尾部血管縮小反應。阿刀平注射或頸動脈竇神經切斷後，潛水反應消失。由本實驗可知化學接受器對潛水心臟血管反應有重要的功用。
• 英文摘要： Photoelectric plethysmogram of the finger tip, the ear lobe and the toe in response to face immersion in water was studied in twenty healthy male subjects. During face immersion in water, heart rate slowed down, and amplitude of the plethysmogram decreased markedly in the finger tip, but not in the ear lobe or the toe. The responses were more pronounced during face immersion than during breath-holding. During Valsalva maneuver, amplitude of finger plethysmogram decreased markedly, but heart rate did not. Bradycardia developed and amplitude of tail plethysmogram decreased during head immersion in rats. Either atropine i.v. or sinus nerve section eliminated the responses, while propranolol had no effect. These data support the concept that the chemoreceptor plays a role in the cardiovascular responses to diving.
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