However, if the right hemisphere is put to sleep, then these people will be able to speak and answer questions. Studies performed in people who have received electroconvulsive shock treatment have also confirmed that language is found most often on the left side. The most recent technique used to study language is by using brain imaging techniques . Positron emission tomography studies show that many of the expected areas of the brain have increased blood flow during language tasks, but there are also areas on both hemispheres that are activated. Actually, people have problems communicating the emotions involved with language when they have damage to the right side of the brain in the area where on the left side it is used for language.
Animals talk to each other, of course.