Conditional associative memory for musical stimuli in nonmusicians: Implications for absolute pitch
Conditional associative memory for musical stimuli in nonmusicians: Implications for absolute pitch
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DOI：
10.1523/jneurosci.1560-05.2005
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发表时间：
2005-08-24
影响因子：
5.3
通讯作者：
Zatorre, RJ
中科院分区：
文献类型：
--
作者：
Bermudez, P;Zatorre, RJ
先前的一项正电子发射断层扫描（PET）研究对有和没有绝对音高的音乐家进行了研究，提出了一个假设，即后背外侧前额叶皮层参与了音高识别的条件联想方面。在这里提出的工作中，我们通过训练8名非音乐家将四种不同的复杂音乐声音（三和弦）中的每一种与任意数字相关联来测试这一假设，该任务旨在对绝对音高识别进行有限的类比。每个受试者在训练前后都进行了功能性磁共振成像扫描。预训练扫描的主动条件（和弦识别）-控制条件（振幅匹配的噪声爆发）比较显示没有显著的激活最大值。对训练后的扫描进行同样的比较，发现前额叶后背外侧、前额叶腹外侧和顶叶区有显著的激活峰。联合分析表明，本研究中后背外侧前额叶活动与上述PET研究中观察到的相似。我们得出的结论是，后背外侧前额叶皮层选择性地参与了我们任务的条件联想方面，就像绝对音高音乐家对一个音符的语言标签的归属一样。
A previous positron emission tomography ( PET) study of musicians with and without absolute pitch put forth the hypothesis that the posterior dorsolateral prefrontal cortex is involved in the conditional associative aspect of the identification of a pitch. In the work presented here, we tested this hypothesis by training eight nonmusicians to associate each of four different complex musical sounds ( triad chords) with an arbitrary number in a task designed to have limited analogy to absolute-pitch identification. Each subject underwent a functional magnetic resonance imaging scanning procedure both before and after training. Active condition ( identification of chords)-control condition (amplitude-matched noise bursts) comparisons for the pretraining scan showed no significant activation maxima. The same comparison for the posttraining scan revealed significant peaks of activation in posterior dorsolateral prefrontal, ventrolateral prefrontal, and parietal areas. A conjunction analysis was performed to show that the posterior dorsolateral prefrontal activity in this study is similar to that observed in the aforementioned PET study. We conclude that the posterior dorsolateral prefrontal cortex is selectively involved in the conditional association aspect of our task, as it is in the attribution of a verbal label to a note by absolute-pitch musicians.