 The cerebellar theory of dyslexia proposes that impairment of cerebellum @-@ controlled muscle movement affects the formation of words by the tongue and facial muscles , resulting in the fluency problems that are characteristic of some dyslexics . The cerebellum is also involved in the automatization of some tasks , such as reading . The fact that some dyslexic children have motor task and balance impairments has been used as evidence for a cerebellar role in their reading difficulties . However , the cerebellar theory is not supported by controlled research studies . 
