Which statement best defines aphasia?

Aphasia is best defined as an impairment in communication abilities. This condition typically arises from damage to the areas of the brain responsible for language processing, particularly in the left hemisphere. Individuals with aphasia may experience difficulties in speaking, understanding language, reading, or writing, although their cognitive functions may remain intact. This definition encompasses the broad range of communication challenges that individuals with aphasia face, making it the most accurate choice.

The other options refer to different conditions: the inability to move correctly describes a motor impairment rather than a language issue; the loss of ability to recognize familiar objects points to a condition such as agnosia; and the inability to understand written text specifies a type of aphasia (alexia) but does not capture the overall communication difficulties associated with the condition. Therefore, the comprehensive definition of communication impairment aligns most closely with the concept of aphasia.