Hall Deborah A, Plack Christopher J
MRC Institute of Hearing Research, University Park, Nottingham, UK.
Neuroreport. 2007 Mar 5;18(4):323-7. doi: 10.1097/WNR.0b013e32802b70ce.
A magnetoencephalographic marker for pitch analysis (the pitch onset response) has been reported for different types of pitch-evoking stimuli, irrespective of whether the acoustic cues for pitch are monaurally or binaurally produced. It is claimed that the pitch onset response reflects a common cortical representation for pitch, putatively in lateral Heschl's gyrus. The result of this functional MRI study sheds doubt on this assertion. We report a direct comparison between iterated ripple noise and Huggins pitch in which we reveal a different pattern of auditory cortical activation associated with each pitch stimulus, even when individual variability in structure-function relations is accounted for. Our results suggest it may be premature to assume that lateral Heschl's gyrus is a universal pitch center.
针对不同类型的音高诱发刺激，已经报道了一种用于音高分析的脑磁图标记（音高起始反应），无论音高的声学线索是单耳产生还是双耳产生。据称，音高起始反应反映了音高的一种共同皮层表征，推测位于外侧赫氏回。这项功能磁共振成像研究的结果对此断言提出了质疑。我们报告了迭代波纹噪声和哈金斯音高之间的直接比较，其中我们揭示了与每种音高刺激相关的不同听觉皮层激活模式，即使考虑了结构 - 功能关系中的个体差异。我们的结果表明，假设外侧赫氏回是一个通用的音高中心可能为时过早。
