aphasia

Aphasia is an inability to comprehend or formulate language because of damage to specific brain regions. The major causes are a cerebral vascular accident (stroke), or head trauma, but aphasia can also be the result of brain tumors, brain infections, or neurodegenerative diseases.

However, the latter are far less common and so not as often mentioned when discussing aphasia. To be diagnosed with aphasia, a person's speech or language must be significantly impaired in one (or more) of the four aspects ...