Dyslexia is an inherited condition. Researchers have determined that a gene on the short arm of chromosome #6 is responsible for dyslexia. That gene is dominant, making dyslexia highly heritable. It definitely runs in families.
Dyslexia results from a neurological difference; that is, a brain differences. People with dyslexia have a larger right-hemisphere in their brains than those of normal readers. That may be one reason people with dyslexia often have significant strengths in areas controlled by the right-side of the brain, such as artistic, athletic, and mechanical gifts; 3-D visualization ability; musical talent; creative problem solving skills; and intuitive people skills.
In addition to unique brain architecture, people with dyslexia have unusual "wiring". Neurons are found in unusual places in the brain, and are not as neatly ordered as in non-dyslexic brains.
In addition to unique brain architecture and unusual wiring, f/MRI studies have shown that people with dyslexia do not use the same part of their brain when reading as other people. Regular readers consistently use the same part of their brain when they read. People with dyslexia do not use that part of their brain, and there appears to be no consistent part used among dyslexic readers.
It is therefore assumed that people with dyslexia are not using the most efficient part of their brain when they read. A different part of their brain has taken over that function. (Cause of Dyslexia)
Dyslexia really is more common in boys than girls; new research shows, contradicting studies suggesting that boys are simply more likely to be diagnosed with the problem because they tend to act up in class when they get frustrated.
The findings suggest boys are at least twice as likely to have dyslexia, a learning disability that involves trouble with reading, said the authors of the research, led by Dr. Michael Rutter of King's College in London..........
