刺激极性对听觉脑干植入物使用者的局部唤起潜力的影响
Anne Schröder1,2, Marko Takanen3, Konrad Schwarz3
1MED-EL Deutschland GmbH, Starnberg, Germany.
Scientific reports
|February 18, 2025
概括
听觉脑干植入物 (ABI) 可以使用特定于ABI的策略来改进. 阴极领先脉冲在引起局部唤起潜力 (LEP) 方面优越,应该指导未来的ABI编码策略.
科学领域:
- 神经科学是一个神经科学.
- 生物医学工程 生物医学工程
- 听力学 听力学是指听力学.
背景情况:
- 听觉脑干植入物 (ABI) 通过耳核刺激恢复听力,通常使用耳植入物策略.
- 优化 ABI 性能可能需要开发特定于 ABI 的刺激和信号编码策略.
- 局部唤起的潜能 (LEP) 提供了一种方法来评估ABI用户的神经反应.
研究的目的:
- 调查使用细粒度刺激和前向掩盖范式在ABI用户中测量LEP的可行性.
- 为LEP振幅分析引入一种新的依赖基线的定义.
- 评估两相脉冲处理和领先阶段极性对LEP的影响及其与听力值的相关性.
主要方法:
- 在十名ABI用户中进行了微粒电刺激,使用前置掩盖范式.
- 测量了局部唤起的潜力 (LEPs),并分析了振幅增长函数.
- 引入了新的依赖基线的LEP振幅定义,以确定值刺激水平和斜率值.
- 研究了阴极与阳极领先脉冲对LEP特征的影响,并将LEP与感知听力值相关联.
主要成果:
- 在阴极和阳极领先脉冲之间没有发现LEP值或斜率的显著差异.
- 对于阴极和阳极领先脉冲的LEP值与感知听力值有显著的相关性,尽管异常值影响了分析.
- 与阳极领先脉冲相比,阴极领先脉冲的LEP峰值延迟时间明显较短.
- 鉴定出主管导脉冲在引起LEPs方面优越.
结论:
- 在听觉脑干植入物使用者中,阴极导向脉冲更有效地引起局部唤起的潜能.
- 这些发现表明,正极导脉冲应该成为开发专门的听觉脑干植入物编码策略的基础.
- 这项研究有助于优化听觉通路损伤的个体的听觉感觉恢复.
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