Agence France-PresseJanuary 15, 2014 14:46
Humans need both sides of their brain for speech, according to a study Wednesday that could rewrite therapy for people verbally impaired by a stroke.
A mainstream theory in neurology is that speech and language are "lateralised" skills -- thus controlled by only one side of the brain, in this case the left.
But the concept's weak point is that it has been mainly based on indirect, rather than direct, observation of how the brain operates.
Researchers at New York University seized a unique opportunity to get a clearer view.