inability (or impaired ability) to understand or produce speech, as a result of brain damage
a region of the brain concerned with the comprehension of language, located in the cortex of the dominant temporal lobe. Damage in this area causes Wernicke’s aphasia, characterized by superficially fluent, grammatical speech but an inability to use or understand more than the most basic nouns and verbs
a region of the brain concerned with the production of speech, located in the cortex of the dominant frontal lobe. Damage in this area causes Broca’s aphasia, characterized by hesitant and fragmented speech with little grammatical structure
a region of the brain concerned with the comprehension of language, located in the cortex of the dominant temporal lobe. Damage in this area causes Wernicke’s aphasia, characterized by superficially fluent, grammatical speech but an inability to use or understand more than the most basic nouns and verbs