Department of General Psychology, University of Padova, Via Venezia 8, 35131, Padova, Italy.
Department of Human and Social Sciences, University of Bergamo, 24129, Bergamo, Italy.
Psychol Res. 2021 Nov;85(8):2882-2891. doi: 10.1007/s00426-020-01464-4. Epub 2021 Jan 6.
Manual dexterity and phonological decoding involve the posterior parietal cortex, which controls location coding for visually guided actions, as well as a large fronto-cerebellar network. We studied the relationship between manual dexterity and reading ability in adult typical readers. Two measurements of manual dexterity were collected to index the procedural learning effect. A linear regression model demonstrated that phonological short-term memory, manual dexterity at time 1 and procedural learning of manual dexterity predicted phonological decoding speed. Similar results were found when left-hand dexterity at time 1 and procedural learning dexterity were entered last. The better one's phonological decoding skill was, the less fluent their manual dexterity was, suggesting a recycle from object-location to letter-location coding. However, the greater the procedural learning, the faster phonological decoding was, suggesting that larger plasticity of object-location coding was linked to better letter-location coding. An independent role of the interhemispheric connections or of the right posterior parietal cortex is also suggested.
手的灵巧性和语音解码涉及顶后皮质，该皮质控制视觉引导动作的位置编码，以及一个大的额-小脑网络。我们研究了成年典型阅读者中手的灵巧性和阅读能力之间的关系。收集了两个手的灵巧性测量指标来指示程序学习效应。线性回归模型表明，语音短期记忆、第 1 次手的灵巧性和手的灵巧性的程序学习预测语音解码速度。当第 1 次左手灵巧性和程序学习灵巧性最后输入时，发现了类似的结果。一个人的语音解码技能越好，他们的手的灵巧性就越不流畅，这表明从物体-位置到字母-位置编码的循环。然而，程序学习越大，语音解码速度越快，这表明物体-位置编码的更大可塑性与更好的字母-位置编码有关。还提示了半球间连接或右顶后皮质的独立作用。
