Broca's and Wernicke's
Expressive dysphasia (non-fluent aphasia) is characterised by intact comprehension but difficulty producing speech. There are several different types of expressive dysphasia depending on the underlying cause.
When it results from damage to the apparatus that produces speech it as called dysarthria. When it results from damage to the area of the brain responsible for producing speech (Broca's area) it is known as Broca's aphasia. Broca's area lies within Brodmann areas 44 and 45.
When the problem lies in the comprehension of speech (receptive aphasia or fluent aphasia) but the actual production of the speech is normal it is called Wernicke's aphasia. Wernicke's area is located in the posterior part of the superior temporal gyrus in the dominant hemisphere, and lies within Brodmann area 22.
When it results from damage to the apparatus that produces speech it as called dysarthria. When it results from damage to the area of the brain responsible for producing speech (Broca's area) it is known as Broca's aphasia. Broca's area lies within Brodmann areas 44 and 45.
When the problem lies in the comprehension of speech (receptive aphasia or fluent aphasia) but the actual production of the speech is normal it is called Wernicke's aphasia. Wernicke's area is located in the posterior part of the superior temporal gyrus in the dominant hemisphere, and lies within Brodmann area 22.
