Mental Reversal of Imagined Melodies: A Role for the Posterior Parietal Cortex
Mental Reversal of Imagined Melodies: A Role for the Posterior Parietal Cortex
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想象旋律的心理逆转：后顶叶皮层的作用
DOI：
10.1162/jocn.2009.21239
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发表时间：
2010
影响因子：
3.2
通讯作者：
Marc Bouffard
中科院分区：
文献类型：
--
作者：
Robert J. Zatorre;Andrea R. Halpern;Marc Bouffard
两个fMRI实验探索了一项音乐想象任务的神经基础，这项任务需要对想象的声音进行操作：旋律的时间反转。音乐家们会看到一首熟悉曲调的前几个音符(实验1)或它的标题(实验2)，然后是一串精确或不精确的反转音符。任务是通过在头脑中颠倒其所有音符来判断第二根弦是否正确，因此需要对所代表的弦进行维护和操作。两项实验都显示，在翻转过程中，顶上叶(顶内沟)有相当大的激活。腹外侧和背外侧额叶皮质也被激活，这与任务过程中所需的记忆负荷一致。在这两项研究中，我们还发现了较弱的证据表明右听觉皮质有一定的激活，这与之前更简单的音乐想象任务的结果是一致的。我们在其他心理转换任务的背景下解释了这些结果，例如视觉领域的心理旋转，已知这些任务招募顶内沟区，我们认为这个区域辅助需要转换感觉输入的一般计算。因此，心理表象任务可能既有任务或通道特定的成分，也有取代任何特定代码的成分，取而代之的是代表非节律性的心理操纵。
Two fMRI experiments explored the neural substrates of a musical imagery task that required manipulation of the imagined sounds: temporal reversal of a melody. Musicians were presented with the first few notes of a familiar tune (Experiment 1) or its title (Experiment 2), followed by a string of notes that was either an exact or an inexact reversal. The task was to judge whether the second string was correct or not by mentally reversing all its notes, thus requiring both maintenance and manipulation of the represented string. Both experiments showed considerable activation of the superior parietal lobe (intraparietal sulcus) during the reversal process. Ventrolateral and dorsolateral frontal cortices were also activated, consistent with the memory load required during the task. We also found weaker evidence for some activation of right auditory cortex in both studies, congruent with results from previous simpler music imagery tasks. We interpret these results in the context of other mental transformation tasks, such as mental rotation in the visual domain, which are known to recruit the intraparietal sulcus region, and we propose that this region subserves general computations that require transformations of a sensory input. Mental imagery tasks may thus have both task or modality-specific components as well as components that supersede any specific codes and instead represent amodal mental manipulation.
DOI：
10.1016/s0926-6410(02)00073-3
发表时间：
2002-06-01
期刊：
COGNITIVE BRAIN RESEARCH
影响因子：
--
作者：
Schroeder, CE;Foxe, JJ
通讯作者：
Foxe, JJ