Increased cortical surface area of the left planum temporale in musicians facilitates the categorization of phonetic and temporal speech sounds
Increased cortical surface area of the left planum temporale in musicians facilitates the categorization of phonetic and temporal speech sounds
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DOI：
10.1016/j.cortex.2013.03.007
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发表时间：
2013-11-01
期刊：
影响因子：
3.6
通讯作者：
Jaencke, Lutz
中科院分区：
文献类型：
--
作者：
Elmer, Stefan;Haenggi, Juergen;Jaencke, Lutz
我们使用结构磁共振成像技术对音乐家和非音乐家进行了测量，以考察左颞叶平面(PT)的皮质特征与辅音-元音(CV)音节及其减谱类似物分类之间的关系。本研究基于前人的功能研究，一直表明左侧PT对CV音节和它们的减谱类似物中的瞬时声学特征特别敏感，并且有明显证据表明左侧PT的结构变化是音乐天赋的结果。通过结合这两个观察结果，我们假设发现音乐家左侧PT的皮质表面积(SA)和皮质厚度(CT)的差异可能有助于对快速变化的语音线索的分类。行为学结果表明，音乐家和非音乐家在CV音节的分类上取得了相似的成绩，而音乐家在要求更高的减谱条件下的表现明显好于对照组。这种更好的行为表现对应于音乐家与非音乐家相比，左侧PT的皮质SA增加。两组间左侧PT的CT差异无统计学意义。与我们的预测一致，我们发现音乐家左侧PT的皮质SA与在声学要求更高的减谱条件下的行为表现呈正相关。因此，我们首次提供了音乐专长、左侧PT的皮层SA和快速变化的语音线索的加工之间的关系的证据。(C)2013爱思唯尔有限公司。保留所有权利。
We measured musicians and non-musicians by using structural magnetic resonance imaging to investigate relationships between cortical features of the left planum temporale (PT) and the categorization of consonant-vowel (CV) syllables and their reduced-spectrum analogues. The present work is based on previous functional studies consistently showing that the left PT is particularly responsive to transient acoustic features in CV syllables and their reduced-spectrum analogues, and on striking evidence pointing to structural alterations of the left PT as a function of musicianship. By combining these two observations, we hypothesized to find that differences in cortical surface area (SA) and cortical thickness (CT) of the left PT in musicians may facilitate the categorization of fast-changing phonetic cues. Behavioural results indicated that musicians and non-musicians achieved a comparable performance in the categorization of CV syllables, whereas the musicians performed significantly better than the controls in the more demanding reduced-spectrum condition. This better behavioural performance corresponds to an increased cortical SA of the left PT in musicians compared to non-musicians. No differences in CT of the left PT were found between groups. In line with our predictions, we revealed a positive correlation between cortical SA of the left PT in musicians and the behavioural performance during the acoustically more demanding reduced-spectrum condition. Hence, we provide first evidence for a relationship between musical expertise, cortical SA of the left PT, and the processing of fast-changing phonetic cues. (C) 2013 Elsevier Ltd. All rights reserved.