Cortical circuitry supporting flexible audiovisual interactions and behaviors

项目摘要 听觉系统和视觉系统之间的相互作用是最成熟的案例之一， 跨通道的相互作用，然而，绝大多数的感觉生理学文献反映了研究， 处理局限于一个单一的方式，我们了解相对较少的电路介导 跨模态相互作用，或在什么条件下，这种电路是活跃的。视听互动甚至存在于 初级听觉皮层（AC），听觉皮层太低，无法通过纯粹的自上而下的连接进行介导。如何 这些信息会影响声音处理吗？哪些连接将视觉信息传递到听觉 皮质？这些早期的跨模态相互作用的功能后果是什么？ 计算原理解释了这个系统中的相互作用，这可以扩展我们对 大脑其他地方的跨通道处理我们的提议将利用觉醒者的力量 转基因小鼠模型来解决这些首要问题的核心方面。我们将联合收割机 用光遗传学操作技术在清醒小鼠的听觉和视觉皮层中进行跨层记录， 定量建模和行为。我们将确定视觉驱动的输入如何影响响应，动态， 以及听觉皮层层和细胞类型之间的功能连接， 将视觉信息传递到听觉皮层的电路，并决定行为目标 调节视觉对听觉皮层的影响以及从视觉到听觉皮层的通信。

Project Summary Interactions between the auditory and visual systems are among the most well-established cases of crossmodal interplay, yet the overwhelming bulk of the sensory physiology literature reflects studies examining processing confined to a single modality and we understand comparatively little about the circuitry mediating crossmodal interplay, or under what conditions such circuits are active. Audiovisual interactions exist even in primary auditory cortex (AC), with latencies too low to be mediated through purely top-down connections. How does this information influence sound processing? Which connections relay visual information to the auditory cortex? What are the functional consequences of these early crossmodal interactions, and what general computational principles account for interactions within this system that could extend our understanding of crossmodal processing elsewhere in the brain? Our proposal will leverage the strengths of the awake transgenic mouse model to address the core aspects of these overarching questions. We will combine translaminar recording in auditory and visual cortices of awake mice with optogenetic manipulation techniques, quantitative modeling, and behavior. We will determine how visually driven inputs affect responses, dynamics, and functional connectivity across auditory cortical layers and cell types, identify and functionally characterize circuitry relaying visual information to auditory cortex, and determine the extent to which behavioral goals modulate visual influence on auditory cortex and communication from visual to auditory cortex.