Abstract
Dyslexia is one of the most common learning disabilities, yet its brain basis and core causes are not yet fully understood. MRI studies commonly demonstrate hypoactivation in left-hemispheric temporo-parietal, occipito-temporal, and inferior frontal networks, along with hyperactivation in corresponding right-hemispheric regions. Based on the recent 15 years of brain imaging researches, this paper proposes three hypotheses about the causes of the activation difference in Dyslexia, analyzes how recent researches support these hypotheses, and draws a conclusion that the three hypotheses have a fusion trend to a certain extent, which can provide possible directions for future studies.
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