Evoked potential study of the inferior collicular response to constant frequency-frequency modulation (CF-FM) sounds in FM and CF-FM bats
Evoked potential study of the inferior collicular response to constant frequency-frequency modulation (CF-FM) sounds in FM and CF-FM bats
复制标题
FM 和 CF-FM 蝙蝠对恒定频率-频率调制 (CF-FM) 声音的下丘反应的诱发电位研究
DOI：
10.1007/s00359-019-01326-4
复制
发表时间：
2019-04-01
影响因子：
2.1
通讯作者：
Chen, Qicai
中科院分区：
文献类型：
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作者：
Fu, Ziying;Xu, Na;Chen, Qicai
回声定位蝙蝠的听觉系统适于处理物种特异性的超声波信号。虽然FM（调频）蝙蝠对它们的方向信号或猎物产生的噪音的频率范围非常敏感，但CF-FM（恒定频率FM）蝙蝠有不成比例的神经元调谐到它们的方向声音的CF分量附近的频率，并且它们中的大多数都是开关响应器。此外，CF-FM蝙蝠的下丘神经元放电作为单或双对CF-FM刺激的反应。为了进一步研究这两类蝙蝠听觉信号处理的差异，作为第一步，我们进行了诱发电位反应的研究，在下丘的CF-FM蝙蝠，蹄蝠和FM蝙蝠，伏翼abramusCF，FM和CF-FM刺激。结果表明，CF声在CF-FM蝙蝠中总是引起丘的开和关反应，而FM蝙蝠对CF声和FM声都只引起丘的开反应，反映了种属特异性的神经回路。然而，当用CF-FM声音刺激时，FM和CF-FM蝙蝠的CF和FM成分都引起了丘反应，这表明它们有一些通用的神经回路。
The auditory system of echolocating bats is adapted for processing species-specific ultrasonic signals. While FM (frequency modulation) bats are strictly sensitive to the frequency ranges of their orientation signals or prey-generated noise, CF-FM (constant frequency-FM) bats have a disproportionate number of neurons tuned to frequencies near the CF component of their orientation sounds, and most of them are on–off responders. Furthermore, the inferior collicular neurons of the CF-FM bats discharged as single-on or double-on responders to CF-FM stimuli. To further study the differences in auditory signal processing of these two types of bats, as the first step we conducted an evoked potential response study in the inferior colliculus of the CF-FM bat,Hipposideros prattiand the FM bat,Pipistrellus abramususing CF, FM and CF-FM stimuli. The results showed that the CF sounds always evoked collicular on- and off-responses in CF-FM bats, but the FM bats only had on-responses to both CF and FM sounds, indicting species-specific neural circuits. However, when stimulated with CF-FM sounds, collicular responses were evoked by both the CF and FM components from both FM and CF-FM bats, suggesting they have some generic neural circuit.