Neural Response Selectivity to Natural Sounds in the Bat Midbrain
Neural Response Selectivity to Natural Sounds in the Bat Midbrain
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DOI：
10.1016/j.neuroscience.2019.11.047
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发表时间：
2020-05-10
期刊：
影响因子：
3.3
通讯作者：
Moss, Cynthia F.
中科院分区：
文献类型：
--
作者：
Salles, Angeles;Park, Sangwook;Moss, Cynthia F.
关于蝙蝠对交流和回声定位呼叫的不同动作选择反应的神经机制知之甚少。例如，在大棕蝠中，调频（FM）食物索取通信叫声与调频回声定位叫声非常相似，分别引导社交和定向行为。使用先进的信号处理方法，我们发现了这些自然声音的时间结构的细微差异，这似乎是听觉辨别和行为决策的关键。我们记录了被动聆听动物中脑下丘（IC）中单个神经元的细胞外电位，并比较了蝙蝠用于社交交流和回声定位的声学信号回放的反应。我们结合从尖峰数量和尖峰触发平均值（STA）获得的信息，揭示了通信或回声定位呼叫的神经元选择性的稳健分类。这些数据强调了时间声学结构对于区分回声定位和食物索取社交呼叫的重要性，并指出了跨物种自然声音处理的一般机制。 (C) 2019 国际广播组织。由爱思唯尔有限公司出版。保留所有权利。
Little is known about the neural mechanisms that mediate differential action-selection responses to communication and echolocation calls in bats. For example, in the big brown bat, frequency modulated (FM) food-claiming communication calls closely resemble FM echolocation calls, which guide social and orienting behaviors, respectively. Using advanced signal processing methods, we identified fine differences in temporal structure of these natural sounds that appear key to auditory discrimination and behavioral decisions. We recorded extracellular potentials from single neurons in the midbrain inferior colliculus (IC) of passively listening animals, and compared responses to playbacks of acoustic signals used by bats for social communication and echolocation. We combined information obtained from spike number and spike triggered averages (STA) to reveal a robust classification of neuron selectivity for communication or echolocation calls. These data highlight the importance of temporal acoustic structure for differentiating echolocation and food-claiming social calls and point to general mechanisms of natural sound processing across species. (C) 2019 IBRO. Published by Elsevier Ltd. All rights reserved.