The somatotopy of speech: phonation and articulation in the human motor cortex.

The somatotopy of speech: phonation and articulation in the human motor cortex.
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DOI:
10.1016/j.bandc.2008.12.006
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发表时间:
2009-06
影响因子:
2.5
通讯作者:
Liotti, Mario
Liotti, Mario
中科院分区:
心理学3区
文献类型:
--
作者:
Brown, Steven;Laird, Angela R.;Pfordresher, Peter Q.;Thelen, Sarah M.;Turkeltaub, Peter;Liotti, Mario

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关于言语产生的神经成像的大量文献已经可靠地显示了初级运动皮层的口面区域的激活。这些激活总是被解释为反映了“嘴”的功能,因此发音。我们使用功能性磁共振成像来比较明显的语音任务与舌头运动,嘴唇运动和元音发声。结果表明,最强的言语运动激活是运动皮层的体视性喉区,从而反映了发声对言语产生的重要贡献。为了进一步分析语音的发声成分,我们对音节歌唱的神经成像研究进行了基于体素的荟萃分析(11项研究),并将结果与先前发表的口头阅读的荟萃分析(11项研究)进行了比较,再次显示了喉部运动区的强烈重叠。总的来说,这些研究结果突出了在语音产生的成像研究中发声的存在,并支持喉运动皮层在调节语音的“旋律”中的作用。
A sizable literature on the neuroimaging of speech production has reliably shown activations in the orofacial region of the primary motor cortex. These activations have invariably been interpreted as reflecting “mouth” functioning and thus articulation. We used functional magnetic resonance imaging to compare an overt speech task with tongue movement, lip movement, and vowel phonation. The results showed that the strongest motor activation for speech was the somatotopic larynx area of the motor cortex, thus reflecting the significant contribution of phonation to speech production. In order to analyze further the phonatory component of speech, we performed a voxel-based meta-analysis of neuroimaging studies of syllable-singing (11 studies) and compared the results with a previously-published meta-analysis of oral reading (11 studies), showing again a strong overlap in the larynx motor area. Overall, these findings highlight the under-recognized presence of phonation in imaging studies of speech production, and support the role of the larynx motor cortex in mediating the “melodicity” of speech.
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