The neural basis of visual skill learning: An fMRI study of mirror reading
The neural basis of visual skill learning: An fMRI study of mirror reading
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DOI：
10.1093/cercor/8.1.1
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发表时间：
1998-01-01
期刊：
影响因子：
3.7
通讯作者：
Gabrieli, JDE
中科院分区：
文献类型：
--
作者：
Poldrack, RA;Desmond, JE;Gabrieli, JDE
知觉技能的学习被认为依赖于大脑皮层的多个区域，但成像研究尚未提供伴随视觉技能学习而来的神经活动变化的证据。使用功能磁共振成像(FMRI)检测与获得镜面阅读技能相关的后脑区域激活的变化。与正常定向文本相比，枕叶、颞叶下皮质、顶上皮质和小脑的多个区域参与了镜像翻转阅读。对于新的刺激，熟练的镜面阅读与右侧顶上皮质和枕后区的激活减少以及左侧颞叶下部的激活增加有关。这些结果表明，学习阅读镜像颠倒的文本涉及到从视觉空间转换到对转换后的字母的直接识别的过程。与不练习相比，练习阅读的刺激与枕叶视觉皮质、下颞叶皮质和顶上皮质的激活减少有关，而在枕顶和外侧颞叶区域的激活增加。通过考察同一任务中的技能学习和特定项目重复启动，这项研究表明，这两种形式的学习都表现出对表现有贡献的一组神经结构的变化。
The learning of perceptual skills is thought to rely upon multiple regions in the cerebral cortex, but imaging studies have not yet provided evidence about the changes in neural activity that accompany visual skill learning. Functional magnetic resonance imaging (fMRI) was used to examine changes in activation of posterior brain regions associated with the acquisition of mirror-reading skill for novel and practiced stimuli. Multiple regions in the occipital lobe, inferior temporal cortex, superior parietal cortex and cerebellum were involved in the reading of mirror-reversed compared to normally oriented text. For novel stimuli, skilled mirror-reading was associated with decreased activation in the right superior parietal cortex and posterior occipital regions and increased activation in the left inferior temporal lobe. These results suggest that learning to read mirror-reversed text involves a progression from visuospatial transformation to direct recognition of transformed letters. Reading practiced, relative to unpracticed, stimuli was associated with decreased activation in occipital visual cortices, inferior temporal cortex and superior parietal cortex and increased activation in occipito-parietal and lateral temporal regions. By examining skill learning and item-specific repetition priming in the same task, this study demonstrates that both of these forms of learning exhibit shifts in the set of neural structures that contribute to performance.