Hypergraphia

Neurologists have found that changes in a specific area of the brain can produce hypergraphia--the medical term for an overpowering desire to write. Thinking in a counterintuitive, neurological way about what drives and frustrates literary creation can suggest new treatments for hypergraphia's more common and tormenting opposite, writer's block. Both conditions arise from complicated abnormalities of the basic biological drive to communicate.

Dr. Alice W. Flaherty, The Midnight Disease, 2004