首页> 外文期刊>The European Journal of Neuroscience >Specific contributions of the basal forebrain corticopetal cholinergic system to electroencephalographic activity and sleep/waking behaviour.
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Specific contributions of the basal forebrain corticopetal cholinergic system to electroencephalographic activity and sleep/waking behaviour.

机译:基底前脑皮质瓣层胆碱能系统对脑电图活动和睡眠/苏醒行为的特定贡献。

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The present study examined the role of the basal forebrain corticopetal cholinergic projection in the regulation of cortical electroencephalographic activity across sleep/wake states in rats. Selective lesions of this projection were effected by local intraparenchymal infusions of the immunotoxin 192 IgG-saporin. Lesions spared the septo-hippocampal cholinergic system, as well as p75-receptor-bearing noncholinergic neurons in the suprachiasmatic nucleus. Relative to sham-lesioned control animals, rats with lesions of basal forebrain cholinergic neurons displayed a significant reduction in high frequency EEG activity, characterized especially by a reduction in gamma EEG power. Lesions did not significantly alter the overall proportion of sleeping and waking states as defined behaviourally, but the attenuation of high frequency EEG activity was apparent across all stages, including REM-like periods. Results are consistent with the view that the basal forebrain corticopetal cholinergic system exerts a general activational effect on the cortical mantle. Although this system may not be essential for sleep/wake stage-switching, it does impact on the cortical states associated with those stages.
机译:本研究检查了基底前脑皮质瓣层胆碱能投射在调节大鼠睡眠/苏醒状态下皮质脑电图活动中的作用。这种投射的选择性病变是通过局部实质性输注免疫毒素192 IgG-saporin来实现的。病变避免了隔上-海马胆碱能系统以及视交叉上核中带有p75-受体的非胆碱能神经元。相对于假手术的对照动物,患有基底前脑胆碱能神经元病变的大鼠表现出高频EEG活性的显着降低,尤其以γEEG功率的降低为特征。病变并未按照行为定义显着改变睡眠和清醒状态的总体比例,但高频脑电活动的减弱在包括REM期在内的所有阶段均可见。结果与以下观点一致:基底前脑皮质瓣层胆碱能系统对皮质套膜具有一般的激活作用。尽管此系统对于睡眠/唤醒阶段切换可能不是必不可少的,但它确实会影响与那些阶段相关的皮质状态。

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