Schul J, Sheridan R A
Biological Sciences, University of Missouri, Columbia, MO 65211, USA.
Neuroscience. 2006;138(1):1-4. doi: 10.1016/j.neuroscience.2005.11.023. Epub 2005 Dec 27.
Auditory stream segregation is the perceptual grouping of the acoustic mixture reaching the ear into coherent representations of sound sources. It has been described in a variety of vertebrates and underlies auditory scene analysis or auditory image formation. Here we describe a phenomenon in an invertebrate that bears an intriguing resemblance to auditory stream segregation observed in vertebrates: in Neoconocephalus retusus (Orthoptera, Tettigoniidae) an auditory interneuron segregates information about bat echolocation calls from background male advertisement songs. This process utilizes differences between the temporal and spectral characteristics of the two stimuli, a mechanism which is similar to those of auditory stream segregation in vertebrates. This similarity suggests that auditory stream segregation is a fundamental feature of auditory perception, widespread from invertebrates to humans.
听觉流分离是指将传入耳朵的声学混合信号感知分组为声源的连贯表征。它已在多种脊椎动物中得到描述，是听觉场景分析或听觉图像形成的基础。在此，我们描述了一种无脊椎动物中的现象，该现象与在脊椎动物中观察到的听觉流分离有着有趣的相似之处：在凹缘新声螽（直翅目，螽斯科）中，一个听觉中间神经元将来自背景中雄性求偶鸣声的蝙蝠回声定位叫声信息分离出来。这一过程利用了两种刺激在时间和频谱特征上的差异，这一机制与脊椎动物的听觉流分离机制相似。这种相似性表明，听觉流分离是听觉感知的一个基本特征，从无脊椎动物到人类广泛存在。
