Institut des Sciences Cognitives, Lyon, France.
Cogn Neuropsychol. 2003 Jan 1;20(1):73-80. doi: 10.1080/02643290244000194.
Introduction Due to structural characteristics of the visual pathways, stimuli that are presented in the right half of the visual field (RVF) are initially projected to the left cerebral hemisphere, while those presented in the left half of the visual field (LVF) are projected to the right cerebral hemisphere. This anatomical feature has frequently been taken to support the notion that the well-documented RVF advantage in recognising printed words is a reflection of functional differences between the two hemispheres; notably that of the dominance of the left hemisphere for processing language. Word stimuli that are sent straight to the left hemisphere are believed to profit from more efficient processing than those sent initially to the right hemisphere, because the latter stimuli must follow a longer and more noisy pathway before reaching the language-dominant hemisphere. In the work by Jordan, Patching, and Thomas (2003) the above notion is further developed to speculate that the point of entry of visual information into the cortex may determine the procedure that will underlie the ensuing word recognition process: "... the left hemisphere can process words by mapping orthographic information in parallel onto lexical entries whereas the right hemisphere has a more rudimentary process, that can only map orthographic information sequentially" (p. 50).
引言
由于视觉通路的结构特征，呈现于视野右半侧（RVF）的刺激最初投射到左大脑半球，而呈现于视野左半侧（LVF）的刺激则投射到右大脑半球。这一解剖学特征经常被用来支持这样一种观点，即已被充分记录的 RVF 在识别印刷单词方面的优势反映了两个半球之间的功能差异；尤其是左半球在处理语言方面的主导地位。人们认为，直接传送到左半球的单词刺激比最初传送到右半球的单词刺激更能受益于更有效的处理，因为后者的刺激必须经过更长、更嘈杂的路径才能到达语言主导半球。在 Jordan、Patching 和 Thomas（2003）的工作中，上述观点进一步发展为推测，即视觉信息进入皮层的切入点可能决定了随后的单词识别过程所依据的程序：“……左半球可以通过将正字法信息并行映射到词汇条目上来处理单词，而右半球的处理过程则更为基础，只能顺序地映射正字法信息”（第 50 页）。
