... then some of us must being doing great: Blogging--It's Good for You. (Hat tip, Dave Lull.)
I wonder about this reasoning, though: " ... lesions in Wernicke’s area, located in the left temporal lobe, result in excessive speech and loss of language comprehension. People with Wernicke’s aphasia speak in gibberish and often write constantly. In light of these traits, Flaherty speculates that some activity in this area could foster the urge to blog."
Well, yes, an injury to an area of the brain results in bizarre manifestations of speech. But that hardly means that ordinary exercise of speech has its origin in brain activity. Quite the reverse, I would think. It is the ordinary exercise of speech that activates a certain region of the brain.