Several studies have found that different levels of brain damage can lead to the occurrence of varying forms of non-word reading disorders. It has been found that during certain tasks, dyslexics had activated one of two regions of the brain: the Broca's area, which is responsible for speech, or the Wernicke's area, which is responsible for forming and understanding. Both areas were seldom active together. This study has led to the conclusion that there exist neural connection breakdowns between the language centers that may be causing dyslexia.
Phonological dyslexia
Surface dyslexia
Deep dyslexia
Global developmental delay
Cortical deafness
Nonverbal learning disorder
Intellectual disability
Nonverbal autism