A Duration Coding Mechanism Underlying Bat Echo Recognition
A Duration Coding Mechanism Underlying Bat Echo Recognition
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DOI：
10.4247/am.2010.aba008
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发表时间：
2010-09
期刊：
影响因子：
--
通讯作者：
C. Wu;P. Jen
中科院分区：
文献类型：
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作者：
C. Wu;P. Jen
Microchiropterans发出超声波信号并分析返回的回声以捕获猎物并避开障碍物。在这种主动的声学行为中，识别自发射脉冲的回波对于成功捕获猎物至关重要。本文综述了我们以前的研究蝙蝠中脑下丘神经元在脉冲参数的动态变化在整个目标接近序列的持续时间，频率和幅度的多参数选择性。这些研究表明，持续时间的选择性是一个神经元的反应属性的动物的声音持续时间的识别，这是一个重要的功能，有助于不同的频谱和时间属性的个人生物声音。这些研究还表明，当脉冲和回声的持续时间与神经元的最佳持续时间相匹配时，持续时间选择性丘神经元具有最大的回声频率和幅度选择性。基于这些研究结果，我们建议，蝙蝠可以想象利用这些持续时间选择性丘神经元的最大回声频率和幅度的选择性提取猎物的功能和大小从预期的成功捕获猎物或避免障碍物的回声。
Microchiropterans emit ultrasonic signals and analyze the returning echoes to catch prey and avoid obstacles. During this active acoustic behavior, to recognize the echoes of self-emitted pulses is of primary importance for successful prey capture. This article reviews our previous studies of bat midbrain inferior collicular neurons in regarding to their multiple-parametric selectivity in duration, frequency and amplitude during the dynamic variation of pulse parameters throughout a target approaching sequence. These studies show that duration selectivity is a neuronal response property underlying an animal's recognition of sound duration which is an important feature contributing to the distinct spectral and temporal attributes of individual biological sounds. These studies also show that duration-selective collicular neurons have maximal echo frequency and amplitude selectivity when the duration of both pulse and echo matches the neuron's best duration. Based on these findings, we propose that the bat could conceivably utilize the maximal echo frequency and amplitude selectivity of these duration-selective collicular neurons to extract prey feature and size from the expected echoes for successful prey capture or avoidance of obstacles.