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首页> 外文期刊>Journal of the Association for Research in Otolaryngology: JARO >The Binaural Interaction Component in Barn Owl (Tyto alba) Presents few Differences to Mammalian Data
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The Binaural Interaction Component in Barn Owl (Tyto alba) Presents few Differences to Mammalian Data

机译：仓O（Tyto alba）中的双耳相互作用成分与哺乳动物数据几乎没有差异

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摘要

The auditory brainstem response (ABR) is an evoked potential that reflects the responses to sound by brainstem neural centers. The binaural interaction component (BIC) is obtained by subtracting the sum of the monaural ABR responses from the binaural response. Its latency and amplitude change in response to variations in binaural cues. The BIC is thus thought to reflect the activity of binaural nuclei and is used to non-invasively test binaural processing. However, any conclusions are limited by a lack of knowledge of the relevant processes at the level of individual neurons. The aim of this study was to characterize the ABR and BIC in the barn owl, an animal where the ITD-processing neural circuits are known in great detail. We recorded ABR responses to chirps and to 1 and 4 kHz tones from anesthetized barn owls. General characteristics of the barn owl ABR were similar to those observed in other bird species. The most prominent peak of the BIC was associated with nucleus laminaris and is thus likely to reflect the known processes of ITD computation in this nucleus. However, the properties of the BIC were very similar to previously published mammalian data and did not reveal any specific diagnostic features. For example, the polarity of the BIC was negative, which indicates a smaller response to binaural stimulation than predicted by the sum of monaural responses. This is contrary to previous predictions for an excitatory-excitatory system such as nucleus laminaris. Similarly, the change in BIC latency with varying ITD was not distinguishable from mammalian data. Contrary to previous predictions, this behavior appears unrelated to the known underlying neural delay-line circuitry. In conclusion, the generation of the BIC is currently inadequately understood and common assumptions about the BIC need to be reconsidered when interpreting such measurements.
机译：听性脑干反应（ABR）是一种诱发电位，反映了脑干神经中枢对声音的反应。通过从双耳响应中减去单耳ABR响应的总和来获得双耳相互作用分量（BIC）。它的潜伏期和幅度响应于双耳提示的变化而变化。因此，BIC被认为反映了双耳核的活动，并被用于非侵入性地测试双耳处理。但是，由于缺乏对单个神经元水平的相关过程的了解，因此任何结论都受到限制。这项研究的目的是鉴定仓中的ABR和BIC的特征，,仓鼠是ITD处理神经回路非常详细的动物。我们记录了ABR对chi声以及麻醉谷仓猫头鹰对1和4 kHz音调的反应。仓owl ABR的一般特征与在其他鸟类中观察到的相似。 BIC的最突出峰与核层相关，因此可能反映了该核中ITD计算的已知过程。但是，BIC的特性与以前发表的哺乳动物数据非常相似，并且没有揭示任何特定的诊断特征。例如，BIC的极性为负，表示对双耳刺激的响应比单耳响应总和预测的要小。这与先前对兴奋性-兴奋性系统（如椎板核）的预测相反。同样，随着ITD的变化，BIC潜伏期的变化也无法与哺乳动物数据区分开。与先前的预测相反，此行为似乎与已知的基础神经延迟线电路无关。总而言之，目前对BIC的生成还没有足够的了解，在解释此类测量时，需要重新考虑有关BIC的常见假设。

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