Dyslexia is a brain-based learning disability that specifically impairs a person’s ability to read. For individuals with dyslexia, specific portions of the brain typically associated with important reading processes may not function in the same ways that they do in individuals without dyslexia. Individuals with dyslexia often have difficulty with phonological processing, spelling, or rapid visual-verbal responding. Importantly, dyslexia is related to reading difficulties, not difficulties that arise from intellectual functioning.
- Defining Dyslexia
Dyslexia affects about one in every five individuals, making it the most commonly diagnosed learning disability. Dyslexia affects the brain areas associated with detection and processing of sounds and their corresponding letters. These letter-sound linkages are fundamental to reading. When these brain regions do not function efficiently to make these connections, reading development is affected.