Projections of Cochlear Nucleus Axons

这项研究旨在了解耳蜗核中的神经细胞如何处理和编码听觉信息，耳蜗核是参与听力的大脑通路的一部分。听觉环境从不同来源的无数声音中提供了丰富而复杂的信息阵列。其中一些信息，如语音，与我们高度相关，而大部分信息则被视为无关的噪音而被忽视。听觉中枢神经系统将听觉信息转化为神经信号，然后在大脑的不同层次上进行分析。为了了解听觉信息处理是如何发生的，这项研究正在进行，以确定听觉信息的哪些方面是由耳蜗核中不同类型的神经细胞编码的，以及耳蜗神经元将这些信息发送到大脑的哪个位置。使用插入单个神经元的微电极记录和分析单个神经细胞的活动，记录对听觉刺激的反应，并将染料注射到神经细胞中，以便使用组织学技术识别它。通过使用光镜和电子显微镜定位和分析这个被标记的神经元，有可能回答一些基本问题，其中包括：(1)某些类型的细胞是否编码听觉信号的特定部分？这些细胞将信息传递到大脑的哪个部分？(3)不同类型神经元之间的相互作用是什么？这些研究对于理解如此复杂的感觉系统如何为我们提供听觉体验至关重要，而听觉对感知和认知体验至关重要。

This research is directed towards understanding how auditory information is processed and coded by nerve cells in the cochlear nucleus, a portion of the brain pathways that are involved in hearing. The auditory environment provides a rich and complex array of information from a myriad of sounds from different sources. Some of this information, such as speech sounds, is highly relevant to us, while much of it is disregarded as extraneous noise. The auditory central nervous system converts auditory information into neural signals which are later analyzed at different levels in the brain. In order to understand how auditory information processing occurs, this research is being conducted to determine what aspects of auditory information are being coded by individual types of nerve cells in the cochlear nucleus as well as where cochlear neurons send this information in the brain. The activity of single nerve cells is recorded and analyzed using microelectrodes inserted into single neurons, the response to auditory stimulation is recorded, and a dye is injected into the nerve cell in order to identify it using histological techniques. By locating and analyzing this labelled neuron using both light and electron microscopy, it is possible to answer a number of basic questions which include: (1) Do certain types of cells encode specific parts of the auditory signal? (2) What part of the brain do these cells relay information to? (3) What are the interactions between individual types of neurons? These studies are essential to understanding how such a complex sensory system provides us with the experience of hearing that is so crucial to perception and cognitive experience.