Valdois S, Carbonnel S, Juphard A, Baciu M, Ans B, Peyrin C, Segebarth C
Laboratoire de Psychologie et Neurocognition, UMR 5105 CNRS, Université Pierre Mendès France, BP 47, 38040 Grenoble cedex, France.
Brain Res. 2006 Apr 26;1085(1):149-62. doi: 10.1016/j.brainres.2006.02.049. Epub 2006 Mar 30.
The cognitive mechanisms involved in polysyllabic pseudo-word processing -- and their neurobiological correlates -- were studied through the analysis of length effects on French words and pseudo-words in reading and lexical decision. Connectionist simulations conducted on the ACV98 network paralleled the behavioral data in showing a strong length effect on naming latencies for pseudo-words only and the absence of length effect for both words and pseudo-words in lexical decision. Length effects in reading were characterized at the neurobiological level by a significant and specific activity increase for pseudo-words as compared to words in the right lingual gyrus (BA 19), the left superior parietal lobule and precuneus (BA7), the left middle temporal gyrus (BA21) and the left cerebellum. The behavioral results suggest that polysyllabic pseudo-word reading mainly relies on an analytic procedure. At the biological level, additional activations in visual and visual attentional brain areas during long pseudo-word reading emphasize the role of visual and visual attentional processes in pseudo-word reading. The present findings place important constraints on theories of reading in suggesting the involvement of a serial mechanism based on visual attentional processing in pseudo-word reading.
通过分析法语单词和假词在阅读及词汇判断中长度效应，研究了多音节假词处理所涉及的认知机制及其神经生物学关联。在ACV98网络上进行的联结主义模拟与行为数据一致，即仅对假词的命名潜伏期显示出强烈的长度效应，而在词汇判断中单词和假词均不存在长度效应。在神经生物学层面，阅读中的长度效应表现为，与单词相比，假词在右侧舌回（BA 19）、左侧顶上小叶和楔前叶（BA7）、左侧颞中回（BA21）及左侧小脑有显著且特定的活动增加。行为结果表明，多音节假词阅读主要依赖于一种分析程序。在生物学层面，长假词阅读过程中视觉及视觉注意脑区的额外激活，强调了视觉及视觉注意过程在假词阅读中的作用。本研究结果对阅读理论提出了重要限制，表明在假词阅读中存在基于视觉注意处理的序列机制。
