TARGET RANGE SENSITIVE NEURONS IN AUDITORY-CORTEX OF MUSTACHE BAT
TARGET RANGE SENSITIVE NEURONS IN AUDITORY-CORTEX OF MUSTACHE BAT
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DOI：
10.1126/science.758681
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发表时间：
1979-01-01
期刊：
影响因子：
56.9
通讯作者：
SUGA, N
中科院分区：
文献类型：
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作者：
ONEILL, WE;SUGA, N
回声定位蝙蝠通过它们发出的生物声纳脉冲和返回的回声之间的时间延迟来确定与目标的距离。通过改变合成脉冲和回声之间的延迟在不同的重复率和持续时间的刺激对，神经元被发现在听觉皮层的胡子蝙蝠（Pteronotus parnellii rubiginosus）是敏感的目标范围在搜索，方法和终端阶段的猎物捕获或着陆。我们发现了两类距离敏感神经元：跟踪神经元，当蝙蝠接近目标时，它对发出的脉冲后的回声的最佳响应延迟变得越来越短，范围也越来越窄;距离调谐神经元，它的最佳延迟是恒定的，只有当目标在某个狭窄的固定范围内时，它才对目标做出响应。范围调谐神经元专门用于处理回声，只有在特定时期的搜索，方法，或终端阶段的回声定位，他们提供支持的理论，蝙蝠测距，结合组的神经元与频谱的首选回声延迟检测目标距离。
Echolocating bats determine distance to targets by the time delay between their emitted biosonar pulses and the returning echoes. By varying the delay between synthetic pulses and echoes in stimulus pairs at various repetition rates and durations, neurons were found in the auditory cortex of the mustache bat (Pteronotus parnellii rubiginosus) which are sensitive to target range during the search, approach and terminal phases of prey capture or landing. Two classes of range-sensitive neurons were found: tracking neurons, whose best delay for response to an echo following the emitted pulse becomes shorter and narrower as the bat closes in on the target, and range-tuned neurons, whose best delay is constant and which respond to the target only when it is within a certain narrow fixed range. Range-tuned neurons are specialized for processing echoes only during a particular period of the search, approach, or terminal phases of echolocation, and they provide support for a theory of ranging in bats that incorporates groups of neurons with a spectrum of preferred echo delays to detect target distance.