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JoVE Encyclopedia of Experiments
Neuroscience
局灶性癫痫大鼠模型中的脑电图记录
局灶性癫痫大鼠模型中的脑电图记录
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Electroencephalography Recording in a Rat Model of Focal Epilepsy

局灶性癫痫大鼠模型中的脑电图记录

Protocol
570 Views
04:02 min
July 8, 2025
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Please note that some of the translations on this page are AI generated. Click here for the English version.

Transcript

以患有局灶性癫痫的麻醉大鼠为例,其特征是脑电活动异常。

将

大鼠固定在立体定向装置中,并通过鼻锥进行麻醉。

完全去除头部皮毛,以防止脑电图或脑电图记录期间的信号干扰。

用酒精清洁皮肤并放置生理盐水拭子以增强电导性。

将

脑电图膏涂抹在多通道脑电图迷你帽的每个电极上,以确保电极和皮肤之间的最佳电导率。

将迷你帽固定在头皮上。

将

接地电极和参比电极放在耳朵上。

将迷你电容连接到放大器。可视化脑电图信号以识别松散连接的电极并改善其连接性。

给予镇静剂并停止麻醉剂流动,以尽量减少其对大脑活动的干扰。

记录脑电图并识别异常电活动事件。

在

随后的脑成像中标记迷你帽在皮肤上的位置,以实现空间相关性。

要开始此过程,请将脑电图电极膏与 0.9% NaCl 溶液混合。添加一滴亚甲蓝,以帮助观察电极内部和皮肤上的电极糊。接下来,将混合糊状物放入注射器中,并确保其中没有气泡。然后,从底部用糊状物填充所有 32 个电极,不要引入任何气泡。

作为大鼠准备程序的一部分,修剪大鼠的头部。然后,将异氟醚减少至 2%。然后,将大鼠放在立体定位装置的加热垫上。用耳杆固定耳道并固定鼻锥以供应麻醉剂。接下来,将眼药膏涂抹在动物的眼睛上。

随后,剃掉它的头,用90%的异丙醇擦拭皮肤,刺激血管,去除油脂。然后,将盐水拭子放在头皮上并完全覆盖以保持良好的皮肤电导,直到准备好放置脑电图迷你帽。将呼吸、温度和三导联心电图探头连接到大鼠的身体,以在记录过程中持续监测其生理机能。

在此过程中,取出大鼠头皮上的盐水拭子,并将准备好的脑电图迷你帽放在其皮肤上。用橡皮筋固定迷你帽。在接地电极和参比电极上涂上一层高电导电极膏。随后,将它们放在各自的耳朵上。然后,将脑电图迷你电容连接到放大器。查看脑电图轨迹的预览并检查所有电极的性能。

然后,腹腔内给大鼠0.25毫克/公斤的Dexdomitor,立即将异氟醚率降低至0%。如果呼吸频率不在 30 至 60 BPM 范围内,请将异氟醚速率轻轻增加到最大 1%。现在,开始脑电图记录并验证脑电图痕迹中是否存在阵发性活动。记录后,在取下脑电图迷你帽之前,在脑电图迷你帽中插入彩色笔,在皮肤顶部标记脑电图迷你帽的三个突出圆圈的位置。拍一张带有地标的老鼠头的照片。

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