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在松鼠子中,听觉皮层前置掩盖效应具有单方面噪音引起的听力损失

Steven W Cheung¹, Christoph E Schreiner²

¹Coleman Memorial Laboratory, Department of Otolaryngology-Head and Neck Surgery, University of California, San Francisco, CA 94115, United States; Surgical Services, San Francisco Veterans Affairs Health Care System, San Francisco, CA 94121, United States.

Hearing research

|March 13, 2026

概括

在松鼠中,噪音引起的听力损失 (NIHL) 削弱了听力皮层的抑制,并增强了促进. 这种向前掩饰的转变反映了神经处理的改变,并将听力缺陷与皮质网络变化联系起来.

科学领域:

神经科学是一个神经科学.
审计系统研究审计系统研究
听力损失研究听力损失研究

背景情况:

前方掩盖是听觉处理和神经抑制的关键测试.
噪音引起的听力损失 (NIHL) 可以影响听力皮层的功能.
了解NIHL对皮质处理的影响对于听觉康复至关重要.

研究的目的:

调查单边NIHL如何影响主要听觉皮层 (A1) 中的前向掩盖特性 (A1).
为了与听力损失的程度相关联皮质前置掩盖的变化.

主要方法:

在对照和NIHL松鼠的初级听觉皮层 (A1) 中记录了多个单元的响应.
使用连续的面罩探针音调,使用不同的面罩频率来评估前方的面罩.
测量了听觉脑干响应 (ABR) 值,以量化听力损失不对称性.

主要成果:

与对照组相比,NIHL动物显示A1反应的抑制减少和促进增加.
抑制强度和抑制带宽下降,特别是在靠近病变的低频神经元中.
向促进的转变与听力损失的不对称性相关.

结论:

慢性NIHL通过减弱抑制和增强促进,显著改变皮质前向掩盖的动态.
这些变化表明抑制力丧失和听觉皮层内部神经元平衡的改变.
研究结果将听觉分辨率的行为缺陷与听觉皮层网络在听力损失后的特定变化联系起来.

关键词:

听觉皮层中的听觉皮层.皮层可塑性是指皮层的可塑性.前方的掩盖方式抑制抑制的抑制作用噪音引起的听力损失在神经元内部的帕尔瓦尔胺.灵长类动物的电生理学索马托斯塔丁在内部神经元中存在.频谱调是指光谱调.时间解决方案时间解决方案

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相关概念视频

Hearing

Hearing

When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.

The Cochlea

The Cochlea

The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.