Aphasia
The table below lists the major types of aphasia. Remember that dysarthria is different and refers to a motor speech disorder.
| Type of aphasia | Notes |
|---|---|
| Wernicke's (receptive) aphasia | Due to a lesion of the superior temporal gyrus This area 'forms' the speech before 'sending it' to Broca's area. Lesions result in sentences that make no sense, word substitution and neologisms but speech remains fluent Comprehension is impaired |
| Broca's (expressive) aphasia | Due to a lesion of the inferior frontal gyrus Speech is non-fluent, laboured, and halting Comprehension is normal |
| Conduction aphasia | Classically due to a stroke affecting the arcuate fasiculus - the connection between Wernicke's and Broca's area Speech is fluent but repetition is poor. Aware of the errors they are making Comprehension is normal |
| Global aphasia | Large lesion affecting all 3 of the above areas resulting in severe expressive and receptive aphasia |