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EFFECTS OF STIMULATION AT DIFFERENT AREAS OF NUCLEUS RAPHE DORSALIS ON GENIOGLOSSUS AND DIAPHRAGM ACTIVITIES
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- Author:
- No author available
- Journal Title:
- ACTA PHYSIOLOGICA SINICA
- Issue:
- 1
- DOI:
- 10.3321/j.issn:0371-0874.1998.01.023
- Key Word:
- 中缝背核;颏舌肌;膈肌;上呼吸道阻力
Abstract： 本实验在48只氨基甲酸乙酯麻醉、断双侧迷走神经的健康家兔上观察了电、化学刺激中缝背核背侧区(dNRD)和腹侧区(vNRD)对颏舌肌和膈肌肌电积分活动的影响.结果如下:(1)长串电脉冲刺激dNRD使颏舌肌和膈肌肌电活动均明显增强;(2)长串电脉冲刺激vNRD时,颏舌肌活动被易化,而膈肌活动则被抑制;(3)在dNRD和vNRD分别微量注射谷氨酸钠,其效应与电刺激结果基本一致.结果提示:中缝背核(NRD)的兴奋可加强颏舌肌的活动,从而可能使上呼吸道阻力降低,其不同核区对呼吸有不同的调制作用.
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