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In 1881, Carl Wernicke first described an illness that consisted of paralysis of eye movements, ataxia, and mental confusion, in 3 patients. The patients, 2 males with alcoholism and a female with persistent vomiting following sulfuric acid ingestion, exhibited these findings, developed coma, and eventually died.
This is how he discovered Broca's area. It's the area of the brain that allows us to produce spoken language. Ten years after Broca's discovery, Carl Wernicke, a neurologist, made a similar discovery; only this time his patients were able to speak.