Abstract
目的 探讨异相睡眠在空间学习记忆中的作用及其可能的神经中枢胆碱能机制.方法雄性Wistar大鼠随机分为异相睡眠剥夺组(PSD组)、大平台对照组(TC组)、正常对照组(CC组),应用Morris水迷宫观察3组动物学习能力行为活动的变化,应用免疫组化方法研究3组动物学习后海马胆碱乙酰基转移酶(ChAT)的表达.结果①从第2天开始,各组的训练成绩逐渐呈不同程度的提高,各个入水点第一次的参数统计显示,PSD组的记忆获得水平明显低于其他两组(P 0.05).②海马的ChAT免疫组化结果:PSD组海马ChAT免疫阳性神经元分布稀疏,高倍视野下阳性细胞数低于其他两组(P 0.05).结论剥夺异相睡眠会造成大鼠空间参考记忆的获得和巩固障碍,而对同一任务的空间工作记忆无影响.剥夺异相睡眠引起海马的胆碱能神经系统的活动障碍,可能与海马依赖性任务的学习记忆障碍有关。
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