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首页> 外文期刊>The European Journal of Neuroscience >Contralateral inhibition as a sensory bias: the neural basis for a female preference in a synchronously calling bushcricket, Mecopoda elongata.
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Contralateral inhibition as a sensory bias: the neural basis for a female preference in a synchronously calling bushcricket, Mecopoda elongata.

机译：对侧抑制是一种感官偏见：在同步鸣叫的cri（Mecopoda elongata）中女性偏爱的神经基础。

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摘要

Imperfect synchrony between male calls occurs widely in acoustically courting crickets and bushcrickets. Males which are able to establish the temporal leadership usually attract more females in choice experiments but the proximate mechanism for this precedence effect is unknown. Here we show that contralateral inhibition, the neural basis for lateral contrast enhancement in the auditory pathways of insects and vertebrates, is also the probable proximate neural mechanism for this female preference. We recorded simultaneously from a pair of identified auditory interneurons in the synchronizing bushcricket Mecopoda elongata. When two identical acoustic stimuli are presented from opposite directions, one preceding the other by 120 ms, the neural representation within the receiver is far stronger for the leader signal. This results from a suppression of the neural response to the follower chirp by reciprocal contralateral inhibition. The advantage of the representation of the leader is 2-3-fold with time delays between 70 and 130 ms; the most clear-cut female preferences have also been found with such delays in previous behavioural experiments. In time-intensity trading experiments, a lead by 120 ms could only be compensated for by increasing the amplitude of the follower signal by 7-11 dB. We discuss contralateral inhibition in auditory systems as a sensory bias that results in female preference for leading signals, with important evolutionary consequences for male calling strategies.
机译：雄性鸣叫之间的不完全同步广泛发生在声学acoustic和丛林bush中。能够建立时空领导力的雄性通常在选择实验中吸引更多的雌性，但是这种优先效应的主要机制尚不清楚。在这里我们表明，对侧抑制是昆虫和脊椎动物的听觉途径中侧向对比增强的神经基础，也是这种女性偏爱的可能的近端神经机制。我们同时记录了一对同步的丛林copMecopoda elongata中的一对听觉中间神经元。当从相反的方向呈现两个相同的声音刺激时，一个在另一个方向之前120 ms，则接收器内的神经表示对于前导信号要强得多。这是由于相反的对侧抑制作用抑制了对跟随者chi的神经反应。领导者代表的优势是2到3倍，且延迟时间在70到130毫秒之间;在先前的行为实验中，也发现了最明确的女性偏爱，但有这种延迟。在时间强度交易实验中，只有通过将跟随信号的幅度增加7-11 dB才能补偿120 ms的超前。我们讨论对侧抑制听觉系统中的感觉偏差，导致女性偏爱主导信号，对男性呼叫策略具有重要的进化后果。

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