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首页> 外文期刊>The European Journal of Neuroscience >Auditory nerve fibre responses in the ferret
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Auditory nerve fibre responses in the ferret

机译：雪貂的听觉神经纤维反应

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The ferret (Mustela putorius) is a medium-sized, carnivorous mammal with good low-frequency hearing; it is relatively easy to train, and there is therefore a good body of behavioural data detailing its detection thresholds and localization abilities. However, despite extensive studies of the physiology of the central nervous system of the ferret, even extending to the prefrontal cortex, little is known of the functioning of the auditory periphery. Here, we provide an insight into this peripheral function by detailing responses of single auditory nerve fibres. Our expectation was that the ferret auditory nerve responsiveness would be similar that of its near relative, the cat. However, by comparing a range of variables (the frequency tuning, the variation of rate-level functions with spontaneous rate, and the high-frequency cut-off of phase locking) across several species, we show that the auditory nerve (and hence cochlea) in the ferret is more similar to that of the guinea-pig and chinchilla than to that of the cat. Animal models of hearing are often chosen on the basis of the similarity of their audiogram to that of the human, particularly in the low-frequency region. We show here that whereas the ferret hears well at low frequencies, this is likely to occur via fibres with higher characteristic frequencies. These qualitative differences in response characteristics in auditory nerve fibres are important in interpreting data across all of auditory science, as it has been argued recently that tuning in animals is broader than in humans.
机译：雪貂（Mustela putorius）是一种中型食肉哺乳动物，具有良好的低频听觉。它相对容易训练，因此有很多行为数据详细说明了其检测阈值和定位能力。然而，尽管对雪貂中枢神经系统的生理学进行了广泛的研究，甚至扩展到前额叶皮层，但对听觉外周的功能知之甚少。在这里，我们通过详细介绍单个听觉神经纤维的反应来提供对这种外周功能的了解。我们的期望是，雪貂的听觉神经反应能力与其近亲猫相似。但是，通过比较多个物种的一系列变量（频率调整，速率水平函数随自发速率的变化以及锁相的高频截止），我们发现听觉神经（以及耳蜗）雪貂中的）与豚鼠和黄鼠的相似之处要比猫的相似。听力动物模型通常是基于其听力图与人的相似性来选择的，尤其是在低频区域。我们在这里表明，尽管雪貂在低频下听得很好，但这很可能是通过特征频率较高的光纤发生的。听神经纤维反应特性的这些质的差异对于解释整个听科学的数据非常重要，因为最近有人争辩说，动物的调节范围比人类的调节范围广。

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