[PREMIUM] The Truth About Lefties (Left-handed)

By the gestation age of 10 weeks, doctors can see that 85% of human fetuses prefer their right hand over their left. This preference (along with motor asymmetry) usually persists later in life The idea that dyslexics were often left or mixed-handed was first raised by Samuel Orton in 1925. Subsequent studies have suggested that left-handedness is indeed more common in dyslexics compared to controls, although a great deal of conflicting data exist, and a majority of dyslexics are right-dominant. Recently, researchers at Oxford performed genetic analysis on families with at least two sibilings who show symptoms of dyslexia. They found that the PCSK6 gene is associated with both dyslexia and mixed- or left-handedness. The PCSK6 gene is interesting because it interacts with another protein […]