Here's why you're right-handed or left-handed
Predisposition is tied to preference of one eye over the other, study finds
By Jennifer Viegas
When a southpaw shakes hands, his left eye and the right portion of his brain are working hard to process the other individual, suggests a new study. The research helps to explain why hand and limb preferences exist across numerous species.
The predisposition, as it turns out, are tied to ocular dominance, or the tendency to prefer visual input from one eye over the other, according to the study, published in the latest Royal Society Biology Letters.
Ocular dominance, in turn, is driven by cerebral lateralization, which refers to how information processing is divided and coordinated between the brain's left and right hemispheres. …more