大鼠弥漫性轴索损伤后海马CA1区锥体神经元电活动变化

目的观察弥漫性轴索损伤(diffuse axonal injury,DAI)后大鼠海马CA1区锥体细胞自发放电的特征,揭示DAI对大鼠海马CAl区锥体神经元兴奋性的影响。方法雄性健康成年SD大鼠30只,随机分为正常对照组及DAI后6h组、12h组、24h组、72h组。采用玻璃微电极细胞外记录的方法记录海马神经元的放电活动,每只动物记录2个单位放电。分析比较各组各个单位放电的放电类型、放电频率等差异。结果 1DAI后各组与正常组大鼠海马CA1区锥体细胞观察到3种类型放电,即不规则放电、规则放电和簇式放电。在放电类型上各组差异无统计学意义。2比较各组的12个单位放电的平均放电频率、平均ISI可得出...

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Published in西安交通大学学报(医学版) Vol. 36; no. 1; pp. 70 - 74
Main Author 段吉强 宋锦宁 郝璞珩 马旭东 李丹东 赵永林 郭小叶 赵君杰
Format Journal Article
LanguageChinese
Published 西安交通大学医学院第一附属医院神经外科,陕西西安710061 2015
渭南市中心医院神经外科,陕西渭南714000%西安交通大学医学院第一附属医院神经外科,陕西西安,710061
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ISSN1671-8259
DOI10.7652/jdyxb201501012

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Summary:目的观察弥漫性轴索损伤(diffuse axonal injury,DAI)后大鼠海马CA1区锥体细胞自发放电的特征,揭示DAI对大鼠海马CAl区锥体神经元兴奋性的影响。方法雄性健康成年SD大鼠30只,随机分为正常对照组及DAI后6h组、12h组、24h组、72h组。采用玻璃微电极细胞外记录的方法记录海马神经元的放电活动,每只动物记录2个单位放电。分析比较各组各个单位放电的放电类型、放电频率等差异。结果 1DAI后各组与正常组大鼠海马CA1区锥体细胞观察到3种类型放电,即不规则放电、规则放电和簇式放电。在放电类型上各组差异无统计学意义。2比较各组的12个单位放电的平均放电频率、平均ISI可得出DAI后12h组的平均放电频率低于其他组,差异有统计学意义;其他组比较差异则无统计学意义。3比较各组簇式放电的簇内ISI:DAI后12h组最小,其次是24h组、72h组,6h组与正常组最大且差异无统计学意义。结论 DAI对大鼠海马CAl区锥体神经元兴奋性具有明显影响,并且呈不同放电类型的动态变化。
Bibliography:brain injury; diffuse axonal injury; burst discharge;extracellular dischargc; pyramidal neurons
DUAN Ji-qiang , SONG Jin-ning , HAO Pu heng , MA Xu-dong LI Dan dong , ZHAO Yongqin , GUO Xiao ye , ZHAO Jun-jie (1. Department of Neurosurgery, the First Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710061~ 2. Department of Neurosurgery, Weinan Central Hospital, Weinan 714000, China)
Objective To study the excitatory feature of hippocampal CA1 pyramidal neurons affected by traumatic brain injury by investigating the spontaneous discharge characteristics of hippocampal CA1 pyramidal cells after diffuse axonal injury (DAD. Methods Thirty healthy male SD rats were randomly divided into 5 groups: the control group, the group of 6 h after DAI, the group of 12 h after DAI, the group of 24: h after DAI, and the group of 72 h after DAI. Glass microelectrode was used to record extracellular hippocampal neurons discharge. Two unit discharges were recorded for each animal. The differences in unit dis
ISSN:1671-8259
DOI:10.7652/jdyxb201501012