Detecting interaural time differences and remodeling their representation
Detecting interaural time differences and remodeling their representation
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DOI：
10.1016/j.tins.2014.03.002
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发表时间：
2014-05
影响因子：
15.9
通讯作者：
Katrin Vonderschen;H. Wagner
中科院分区：
文献类型：
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作者：
Katrin Vonderschen;H. Wagner
耳间时间差(ITDS)是声音定位和听觉场景分析的重要线索。为了评估这一线索，听觉系统在脑干中的神经元检测到来自两只耳朵的输入的一致到达之前，在内部延迟双耳输入以补偿外部延迟。内部延迟的不同来源一直受到争议的讨论，并引起了对ITD表示的相互矛盾的解释，这些解释是由于符合检测而产生的。然而，最近的发现表明，在检测步骤之后，ITD的表现经历了实质性的转变或重塑。在这里，我们将检测步骤与重构分开处理，并解释为什么尽管在中脑的检测和表示有所不同，但不同物种的ITD在前脑中可能存在相似的表示。
Interaural time differences (ITDs) represent an important cue in sound localization and auditory scene analysis. To assess this cue the auditory system internally delays binaural inputs to compensate for the outer delay, before neurons in the brainstem detect the coincident arrival of the inputs from the two ears. Different origins of internal delays have been controversially discussed and have given rise to conflicting interpretations of the ITD representation ensuing from coincidence detection. Yet, recent findings indicate that ITD representations undergo substantial transformations or remodeling after the detection step. Here we treat the detection step separately from remodeling, and explain why a similar representation of ITD across species may exist in the forebrain despite differences in detection and representation in the midbrain.