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距肛缘不同部位的直肠刺激对肛直肠抑制反射的影响 被引量:2

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摘要 目的观察不同部位的直肠腔内刺激对肛直肠抑制反射有何影响。方法对20只大白鼠,分别距肛缘2、4、6、8cm处的直肠腔内进行刺激,诱发肛直肠抑制反射。结果直肠2、4cm处的刺激可引出典型的肛直肠抑制反射,两处的反射在最大下降幅度和持续时间上无差异,距肛缘4cm和6cm处的反射在最大下降幅度上有明显差异,但在持续时间上没有差别,在直肠8cm处的无该反射引出。结论肛直肠抑制反射仅能在距肛缘的适当距离的直肠腔内引出,距肛缘不同距离的直肠腔内刺激对肛直肠抑制反射的压力下降、持续时间均有影响,直肠腔内不同部位的刺激具有不同的生理意义。
出处 《江西医学院学报》 2005年第4期94-95,97,共3页 Acta Academiae Medicinae Jiangxi
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