The left and right hemispheres of the brain are connected by a bundle of fibers called the corpus collosum. Ambidextrous, left handers and cross-dominant people have symmetrical brains as opposed to right handers, who have larger left hemispheres. Cross-dominant, lefties and ambidextrous people also have a stronger corpus collosum which lends itself to better communication between the two hemispheres. It seems like better communication between hemispheres would be an evolutionary benefit.

So, I am curious as to why a symmetrical brain would have a higher rate of mental illness than a right handed/left brained person, as reported in this news release by Imperial College London: Mixed-handed children more likely to have mental health, language and scholastic problems, say researchers

Your Answer

 
discard

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.