Impaired visual search in dyslexia relates to the role of the magnocellular pathway in attention.

摘要: We tested the hypothesis that in a cluttered visual scene, magnocellular (M) pathway is crucial for focusing attention serially on objects field. Since developmental dyslexia commonly associated with an M deficit, we compared reading impaired children and age-matched normal readers search task required detection of target defined by conjunction two features, namely form colour, are processed parvocellular dominated ventral neocortical stream. The dyslexic group's performance was significantly poorer than controls when there were large number distractor items. scheme selective proposed from these results provides neural mechanism underlies explains pathophysiology dyslexia.