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Classification and distribution of expiratory neurons in brainstem slices isolated from neonatal rats
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- Author:
- No author available
- Journal Title:
- JOURNAL OF THE FOURTH MILITARY MEDICAL UNIVERSITY
- Issue:
- 10
- DOI:
- 10.3321/j.issn:1000-2790.2005.10.002
- Key Word:
- 延髓;脑片;呼气神经元;双相吸气神经元
Abstract： 目的: 探讨新生大鼠延髓脑片上呼气神经元的类别及相应的分布情况.方法: 制作新生大鼠离体延髓脑片,以舌下神经根放电活动作为呼吸活动的指标,同步记录呼气神经元单位的放电活动,并对照舌下神经放电的时相关系对神经元进行分类.结果: 在延髓腹外侧区,共记录到呼气神经元81个,根据它们的放电特征可分为双相呼气神经元(22个)、全呼气(24个)和晚呼气神经元(35个)3种亚型;它们在面神经核尾端和侧网状核之间沿疑核呈混杂分布,各亚型之间无明显的分布优势.结论: 新生大鼠延髓脑片上存在3种具有不同放电形式的呼气神经元,它们在延髓内成混杂分布,其中双相呼气神经元总是在舌下神经吸气性放电,与成年动物延髓内的前吸气神经元活动比较类似,可能在基本呼吸节律发生中起重要作用.
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