Behavioral and neural correlates of perceived and imagined musical timbre
Behavioral and neural correlates of perceived and imagined musical timbre
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DOI：
10.1016/j.neuropsychologia.2003.12.017
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发表时间：
2004-01-01
期刊：
影响因子：
2.6
通讯作者：
Johnson, JA
中科院分区：
文献类型：
--
作者：
Halpern, AR;Zatorre, RJ;Johnson, JA
通过使用功能磁共振成像的音色意象任务的一般性的调查结果，涉及次级听觉区的听觉意象进行了测试。另一个目的是测试在先前的研究中发现的补充运动区（SMA）的活动是否与默读有关。中等音乐背景的参与者被扫描，同时对听到或想象的乐器声音的音色进行相似性判断。关键控制条件是视觉想象任务。在感知和想象条件下的判断模式是相似的，这表明感知和图像访问类似的音色认知表征。正如预期的那样，听到音色的判断，相对于视觉图像控制，激活初级和次级听觉区与一些右侧不对称。与之前的数据一致，相对于视觉图像控制，音色图像也激活了次级听觉区域，尽管强度不太强烈，但与之前的数据一致雅阁。在这些区域的感知和图像条件之间观察到显着的重叠。由于视觉控制任务导致听觉区域相对于无声基线的失活，我们将音色意象效应解释为这种失活的逆转。尽管缺乏一个明显的subvocalization组件的音色图像，SMA的一些活动进行了观察，这表明SMA可能有一个更普遍的作用，在图像以外的任何运动组件。(C)2004爱思唯尔有限公司保留所有权利。
The generality of findings implicating secondary auditory areas in auditory imagery was tested by using a timbre imagery task with fMRI. Another aim was to test whether activity in supplementary motor area (SMA) seen in prior studies might have been related to subvocalization. Participants with moderate musical background were scanned while, making similarity judgments about the timbre of heard or imagined musical instrument sounds. The critical control condition was a visual imagery task. The pattern of judgments in perceived and imagined conditions was similar, suggesting that perception and imagery access similar cognitive representations of timbre. As expected, judgments of heard timbres, relative to the visual imagery control, activated primary and secondary auditory areas with some right-sided asymmetry. Timbre imagery also activated secondary auditory areas relative to the visual imagery control, although less strongly, in accord with previous data. Significant overlap was observed in these regions between perceptual and imagery conditions. Because the visual control task resulted in deactivation of auditory areas relative to a silent baseline, we interpret the timbre imagery effect as a reversal of that deactivation. Despite the lack of an obvious subvocalization component to timbre imagery, some activity in SMA was observed, suggesting that SMA may have a more general role in imagery beyond any motor component. (C) 2004 Elsevier Ltd. All rights reserved.