Traditionally, dyslexia is thought to be a phonological deficit in the brain. This is absolutely true in many cases, but recent research has shown there are other ways you can become a poor reader.
Donna Coch, Ed.D, Dartmouth College shares recent research. You could be a poor reader because of ventral visual deficits (visual fine detail - the visual difference between C and G is very minor but huge if you want to read.). You could be a poor reader because of dorsal visual deficits (might be binocular stability - left and right eye working in unity, lacking this skill causes words to 'move' on the page.). You could be a poor reader because of phonological deficits (using the right temporal region versus left temporal region), or all three of these systems may be developed but they are not working in concert - a connectivity issue. Finally, you could be a poor reader because of deficits in meaning (vocabulary) and sparse semantic networks. Reading is an incredibly complex task that involves multiple brain networks and skills. View her entire lecture here.
