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JoVE Encyclopedia of Experiments
Neuroscience
通过脑电图记录自由移动的大鼠幼崽的诱发癫痫发作
通过脑电图记录自由移动的大鼠幼崽的诱发癫痫发作
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Recording of Induced Seizures through Electroencephalography in Freely Moving Rat Pups

通过脑电图记录自由移动的大鼠幼崽的诱发癫痫发作

Protocol
426 Views
02:31 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

取一只自由移动的大鼠幼崽,在海马体中植入了记录电极,在前额叶皮层中植入了参考电极,该电极建立了用于比较的基线信号。

将

电极连接到数据采集系统以记录电活动。

突触前神经元在突触处释放神经递质,突触与突触后神经元上的受体结合。神经递质结合诱导离子流入,改变膜电位并产生突触后电位或 PSP。

记录电极从神经元群中细胞外捕获总和的 PSP 作为脑电图或脑电图信号。

腹腔注射一种诱导癫痫发作的神经毒素,该神经毒素与突触后神经元上的兴奋性神经递质受体结合。

毒素持续激活受体,允许持续的阳离子流入。这会产生达到阈值并不断触发动作电位的连续 PSP。

神经元网络中动作电位的连续放电导致电活动的同步爆发,称为癫痫发作。

通过脑电图模式监测神经毒素引起的癫痫发作。

恢复期过后,单独饲养幼犬进行约 10 分钟的录音,以便幼犬熟悉环境。将电极连接到放大器,并将放大器连接到连接到计算机的 AD 转换器。小心不要缠结这些连接。

接下来,在数据采集单元上,选择至少 10,000 赫兹的采样率进行记录,并检查数据传输是否正确。收集基线记录。进行基线记录后,腹腔注射卡宁酸以诱导癫痫发作。注射后15分钟,观察并记录癫痫放电情况。

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