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以一只癫痫诱导的大鼠为例,在头骨中植入了电极。电极的尖端插入腹侧海马体区域。
将脑电图或脑电图记录系统连接到植入的电极。
将大鼠转移到有机玻璃圆柱体中,以记录动物自由移动时的大脑活动。
癫痫诱导导致神经元突触中兴奋性神经递质的释放增加,而抑制性神经递质的释放减少,破坏兴奋性和抑制性信号之间的平衡。
兴奋性神经递质的增加会引发正离子的持续流入,使神经元过度兴奋。这会导致电信号的连续产生。
相邻神经元在高频下爆发同步电活动称为癫痫发作。
使用植入的电极,记录大脑活动的异常爆发,以识别癫痫诱导的大鼠癫痫发作的发生。
首先打开位于法拉第笼外部的放大器。打开脑电图软件,开始脑电图采集,观察未连接电缆产生的脑电图信号。
接下来,将动物连接到系留脑电图记录系统,方法是用一只手的两根伸展的手指握住动物的头部,并用另一只另一只手将连接器拧紧到电极基座上。
根据单个动物的电极信号在放大器的每个通道上设置一个放大因子,使脑电图信号符合比例。然后,让动物在研究人员的直接观察下探索新笼子至少一小时。
根据动物的商品调整电缆,并确保电缆不会干扰动物的运动和躺姿。
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