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Echolocating bats rely on an innate speed-of-sound reference [Neuroscience]
Proceedings of the National Academy of Sciences of the United States of America ( IF 9.412 ) Pub Date : 2021-05-11 , DOI: 10.1073/pnas.2024352118
Eran Amichai, Yossi Yovel

Animals must encode fundamental physical relationships in their brains. A heron plunging its head underwater to skewer a fish must correct for light refraction, an archerfish shooting down an insect must “consider” gravity, and an echolocating bat that is attacking prey must account for the speed of sound in order to assess its distance. Do animals learn these relations or are they encoded innately and can they adjust them as adults are all open questions. We addressed this question by shifting the speed of sound and assessing the sensory behavior of a bat species that naturally experiences different speeds of sound. We found that both newborn pups and adults are unable to adjust to this shift, suggesting that the speed of sound is innately encoded in the bat brain. Moreover, our results suggest that bats encode the world in terms of time and do not translate time into distance. Our results shed light on the evolution of innate and flexible sensory perception.



中文翻译:

蝙蝠的回声依赖于先天的音速参考[神经科学]

动物必须在大脑中编码基本的物理关系。一只苍鹭将头伸到水下串成鱼,必须纠正光的折射,射杀昆虫的弓箭鱼必须“考虑”重力,而攻击猎物的回声蝙蝠必须考虑声速,以评估声速。动物是学习这些关系还是它们天生就编码了?随着成年动物都是开放性问题,它们是否可以进行调节?我们通过改变声音的速度并评估自然经历不同声音速度的蝙蝠的感觉行为来解决这个问题。我们发现新生的幼崽和成年幼崽都无法适应这种转变,这表明声音的速度是蝙蝠大脑固有的编码方式。而且,我们的研究结果表明,蝙蝠用时间对世界进行编码,而不能将时间转化为距离。我们的研究结果揭示了先天性和灵活感官知觉的发展。

更新日期:2021-05-03
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