Neuronal encoding of ultrasonic sound by a fish.

Neuronal encoding of ultrasonic sound by a fish.
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鱼对超声波的神经元编码。

DOI:
10.1152/jn.01200.2003
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发表时间:
2004
期刊:
Journal of neurophysiology.
影响因子:
--
通讯作者:
Popper,ArthurN
Popper,ArthurN
中科院分区:
--
文献类型:
--
作者:
Plachta,DennisTT;Song,Jiakun;Halvorsen,MicheleB;Popper,ArthurN

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许多种类的齿鲸(齿鲸)使用高频率的点击(60-170 kHz)来识别环境中的物体,包括潜在的猎物。行为学研究表明,美洲沙鲱(Alosa saparissima)可以探测到类似于可能是其捕食者的齿鲸类的超声波信号。美洲沙鱼对70 ~ 110 kHz的超声波脉冲也表现出强烈的逃避行为,至少能在水平面内确定声源的位置。本研究探讨了美国沙德超声检测的生理方面,并提供了第一个洞察到任何非哺乳类脊椎动物的超声信号的神经编码。通过穿透小脑表面获得记录。除两个单位外,所有单位都对超声有反应。超声敏感单位没有相位耦合到任何刺激频率。有些单位类似于蝙蝠外侧丘系腹侧核中发现的恒定潜伏期神经元的反应。我们认为,超声波和声波信号处理沿着不同的途径在Alosa。Alosa中的超声路径似乎是一个可能被适配的特征检测器(例如,频率、强度)到齿鲸回声定位信号。
Many species of odontocete cetaceans (toothed whales) use high-frequency clicks (60–170 kHz) to identify objects in their environment, including potential prey. Behavioral studies have shown that American shad,Alosa sapidissima,can detect ultrasonic signals similar to those of odontocetes that are potentially their predators. American shad also show strong escape behavior in response to ultrasonic pulses between 70 and 110 kHz and can determine the location of the sound source at least in the horizontal plane. The present study examines physiological aspects of ultrasound detection by American shad and provides the first insights into the neural encoding of ultrasound signals in any nonmammalian vertebrate. The recordings were obtained by penetration through the cerebellar surface. All but two units responded exclusively to ultrasound. Ultrasound-sensitive units did not phase-couple to any stimulus frequency. Some units resembled the response of constant latency neurons found in the ventral nucleus of the lateral lemniscus of bats. We suggest that ultrasonic and sonic signals are processed along different pathways inAlosa. The ultrasonic pathway inAlosaappears to be a feature detector that is likely to be adapted (e.g., frequency, intensity) to odontocete echolocation signals.
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