He did this on the basis of the location of brain injuries that caused aphasia.

A person with this aphasia cannot understand the spoken words of others or read written words.

For instance, patients with naming deficits (anomic aphasia) might show an inability only for naming buildings, or people, or colors.

Melodic intonation therapy is often used to treat non fluent aphasia and has proved to be very effective in some cases.

This problem is exactly what patients with Wernicke s aphasia have in their own language they can't isolate significant sound characteristics and classify them into known meaningful systems.