"Dysphasia (/d?s?fe(?)zj?/) is a speech disorder in which there is an
impairment of speech and of comprehension of speech. It is caused by brain
damage, usually in the left side of the brain which is responsible for
language and communication. The word comes from the Greek dys- (impairment)
and phasia (?????) (speech).

The term dysphasia has been eclipsed by the modern usage of the term "aphasia"
particularly in the field of speech/language pathology so as not to confuse
with the swallowing disorder "dysphagia." Aphasia literally means no speech.
But the speech impairment in aphasia could range from complete absence of
speech to difficulty in naming a few objects. Aphasia is generally tested on
the basis of comprehension of speech, fluency of speech, repetition and naming
of objects. On this basis, aphasia can be classified as global aphasia,
wernicke's aphasia, broca's aphasia, conduction aphasia, transcortical motor
aphasia, transcortical sensory aphasia, anomic aphasia."