Flaherty, who studies conditions such as hypergraphia (an uncontrollable urge to write) and writer’s block, also looks to disease models to explain the drive behind this mode of communication. For example, people with mania often talk too much. “We believe something in the brain’s limbic system is boosting their desire to communicate,” Flaherty explains. Located mainly in the midbrain, the limbic system controls our drives, whether they are related to food, sex, appetite, or problem solving. “You know that drives are involved [in blogging] because a lot of people do it compulsively,” Flaherty notes. Also, blogging might trigger dopamine release, similar to stimulants like music, running and looking at art.
The frontal and temporal lobes, which govern speech—no dedicated writing center is hardwired in the brain—may also figure in. For example, 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.
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