Echo amplitude sensitivity of bat auditory neurons improves with decreasing pulse-Echo gap

Philip H.S. Jen, Chung Hsin Wu

    研究成果: 雜誌貢獻文章同行評審

    摘要

    During hunting, insectivorous bats systematically vary the parameters of emitted pulses and analyze the returning echoes to extract prey features. As such, the duration of the pulse (P) and echo (E), the P-E gap, and the P-E amplitude difference progressively decrease throughout the preyapproach sequence. Our previous studies have shown that most inferior collicular neurons of bats discharge maximally to a best duration, and they have the sharpest echo frequency and amplitude sensitivity when stimulated with P-E pairs with duration the same as the best duration. Furthermore, their echo duration and frequency sensitivity improves with decreasing P-E duration and P-E gap. The present study shows that this is also true in the amplitude domain. Thus, all these data indicate that bats can better extract multiple parameters of expected rather than unexpected echo after pulse emission. They also support the hypothesis that a bat's inferior collicular neurons improve the response sensitivity in multiple parametric domains as the prey is approached to increase the success of hunting.

    原文英語
    頁(從 - 到)38-43
    頁數6
    期刊NeuroReport
    26
    發行號1
    DOIs
    出版狀態已發佈 - 2015 一月 7

    ASJC Scopus subject areas

    • Neuroscience(all)

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