Griffiths T D, Elliott C, Coulthard A, Cartlidge N E, Green G G
Department of Physiological Sciences, Newcastle University Medical School, Newcastle-upon-Tyne, UK.
Neuroreport. 1998 Oct 26;9(15):3383-6. doi: 10.1097/00001756-199810260-00009.
The detection of phase or timing differences, and amplitude differences between the two ears are cues for the spatial analysis of sound by humans. Previous physiological and anatomical studies of animals suggest that phase and amplitude differences between the ears may depend on different pathways, though human psychophysical studies suggest that interaural phase and amplitude differences between the two ears may be coded in the same way. Here we describe detailed psychophysical analysis of a subject with multiple sclerosis affecting the brain stem. He has a complete deficit in the detection of phase between the ears with preserved detection of interaural amplitude. The results prove that a distinct mechanism exists in humans for interaural phase detection.
两耳之间相位或时间差异以及幅度差异的检测，是人类对声音进行空间分析的线索。先前对动物的生理和解剖学研究表明，两耳之间的相位和幅度差异可能依赖于不同的神经通路，尽管人类心理物理学研究表明，两耳之间的双耳相位和幅度差异可能以相同的方式进行编码。在此，我们描述了对一名患有影响脑干的多发性硬化症患者的详细心理物理学分析。他在两耳之间相位检测方面完全缺失，但两耳间幅度检测功能保留。结果证明，人类中存在一种独特的双耳相位检测机制。
