CNRS, Aix Marseille Univ, LNC, Marseille, France.
CNRS, Université de Toulouse Paul Sabatier, CerCo, Toulouse, France.
Brain Lang. 2019 Dec;199:104694. doi: 10.1016/j.bandl.2019.104694. Epub 2019 Oct 3.
The aim of the present study was to uncover a possible common neural organizing principle in spoken and written communication, through the coupling of perceptual and motor representations. In order to identify possible shared neural substrates for processing the basic units of spoken and written language, a sparse sampling fMRI acquisition protocol was performed on the same subjects in two experimental sessions with similar sets of letters being read and written and of phonemes being heard and orally produced. We found evidence of common premotor regions activated in spoken and written language, both in perception and in production. The location of those brain regions was confined to the left lateral and medial frontal cortices, at locations corresponding to the premotor cortex, inferior frontal cortex and supplementary motor area. Interestingly, the speaking and writing tasks also appeared to be controlled by largely overlapping networks, possibly indicating some domain general cognitive processing. Finally, the spatial distribution of individual activation peaks further showed more dorsal and more left-lateralized premotor activations in written than in spoken language.
本研究旨在通过感知和运动表征的耦合，揭示口语和书面交流中可能存在的共同神经组织原则。为了确定处理口语和书面语言基本单位的可能共享神经基础，我们在两个实验会话中对相同的受试者进行了稀疏采样 fMRI 采集协议，在这两个实验会话中，受试者阅读和书写相同的字母，并听到和口头产生相同的音素。我们发现，在口语和书面语的感知和产生过程中，都存在共同的运动前区激活的证据。这些脑区的位置局限于左侧额侧和额内侧皮质，与运动前皮质、下额前皮质和补充运动区相对应。有趣的是，说话和写作任务似乎也由很大程度上重叠的网络控制，这可能表明存在一些领域普遍的认知处理。最后，个体激活峰的空间分布进一步表明，书面语比口语有更多的背侧和更左侧的运动前区激活。
