Neural processing of target distance by echolocating bats: functional roles of the auditory midbrain.
Neural processing of target distance by echolocating bats: functional roles of the auditory midbrain.
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DOI：
10.1016/j.neubiorev.2010.12.015
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发表时间：
2011-11
影响因子：
8.2
通讯作者：
Portfors, Christine V.
中科院分区：
文献类型：
--
作者：
Wenstrup, Jeffrey J.;Portfors, Christine V.
关键词：
蝙蝠利用生物声纳来估计距离，避开障碍物，捕捉移动的猎物。主要的距离线索是蝙蝠发出的回声定位脉冲和回波返回之间的延迟。小胡子蝙蝠的听觉中脑（下丘，IC）对脉冲回波延迟的分析至关重要。集成电路神经元对脉冲和回波的调频（FM）元素之间的某些延迟具有选择性。集成电路的一个作用是通过一系列光谱-时间整合相互作用创造这些“延迟调谐”，“FM-FM”响应特性。中脑的第二个主要作用是将目标距离信息投射到大脑的许多部分。通过听觉丘脑的通路经过彻底的重组，在听觉皮层形成高度有序的脉冲回波延迟图，可能有助于目标距离分析的感知特征。IC中的FM-FM神经元也强烈地投射到前运动中心，包括前顶盖和脑桥核。这些路径可能有助于蝙蝠在接近目标时快速调整飞行、身体位置和声纳发声。
Using their biological sonar, bats estimate distance to avoid obstacles and capture moving prey. The primary distance cue is the delay between the bat's emitted echolocation pulse and the return of an echo. The mustached bat's auditory midbrain (inferior colliculus, IC) is crucial to the analysis of pulse-echo delay. IC neurons are selective for certain delays between frequency modulated (FM) elements of the pulse and echo. One role of the IC is to create these “delay-tuned”, “FM-FM” response properties through a series of spectro-temporal integrative interactions. A second major role of the midbrain is to project target distance information to many parts of the brain. Pathways through auditory thalamus undergo radical reorganization to create highly ordered maps of pulse-echo delay in auditory cortex, likely contributing to perceptual features of target distance analysis. FM-FM neurons in IC also project strongly to pre-motor centers including the pretectum and the pontine nuclei. These pathways may contribute to rapid adjustments in flight, body position, and sonar vocalizations that occur as a bat closes in on a target.
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DOI：
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