First off, I'll start with what dyslexia is. Dyslexia is a disorder caused either by development or brain trauma, and it affects 5 to 17% of children. It basically causes the mind to be unable to properly decode, read, manipulate, and understand language. It has been found that this can be spotted even before a child learns to read, by using an MRI. Obviously, all language is controlled by the brain. An MRI is used, along with many other things, to see brain function. The brain's language section will perform in a certain way if it works properly, and a certain way if it works incorrectly. If a child has dyslexia, the MRI can be used to find this issue in the brain, and thus it will be treatable at the youngest age possible. This can help many children, since dyslexia is somewhat treatable, especially if found at a young age.
Source: http://www.sciencedaily.com/releases/2012/01/120123152510.htm
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