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JoVE Encyclopedia of Experiments
Neuroscience
测量小鼠的听觉脑干反应
测量小鼠的听觉脑干反应
Encyclopedia of Experiments
Neuroscience
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Encyclopedia of Experiments Neuroscience
Measuring the Auditory Brainstem Response in Mice

测量小鼠的听觉脑干反应

Protocol
629 Views
02:22 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

将麻醉的鼠标放入隔音盒中以记录精确的听力阈值。

将一个针状电极插入头部中央的皮肤下,将另一个电极插入耳朵后面。

在尾部附近放置一个接地电极。

将扬声器与电极放在鼠标耳朵前。

设置所需的参数,例如频率和强度,然后应用声学刺激。

内耳接收到声刺激并将其转换为电信号,通过听觉神经传播到脑干。

电极检测听觉脑干反应或 ABR,将其记录为波形。

在一系列所需的刺激强度下测量 ABR。

记录 ABR 阈值,这是产生以 V 波为特征的大脑反应所需的最小刺激强度。

使用专为小动物设计的商业 ABR 测试系统进行 ABR 测量,并在全身麻醉下保持动物。在顶点、左耳耳廓后面和靠近尾巴的背部放置 12 毫米皮下针电极,以测量听力阈值。

将扬声器放置在距离动物左耳一厘米的地方后,使用扬声器提供声学刺激。选择正弦波作为刺激,选择 10K 作为窗口尺度。转动频率旋钮以获得所需的声刺激频率。

通过转动函数发生器上的 AMLP 旋钮来调整刺激强度。通过将 AMLP 旋钮转到根据校准计算得出的合适电压来获得所需的刺激强度。在 10 到 100 分贝 SPL 的一系列刺激强度下收集 ABR 测量值,步长为 10 分贝。将可能引起可辨别的 V 波的最小刺激强度水平标记为 ABR 阈值。

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