In a study, researchers tested two stroke patients. Patient A produced halting, telegraphic speech ("walk... dog... yesterday") but understood spoken instructions normally. Patient B spoke fluently in long sentences but produced nonsense words and had great difficulty understanding speech. Imaging localized Patient A's lesion to the left frontal lobe and Patient B's to the left temporal lobe.
Patient B's fluent but meaningless speech and impaired comprehension are most consistent with
- A
Broca's aphasia from frontal lobe damage
- B
Global aphasia from bilateral lesions
- Ccheck_circle
Wernicke's aphasia from temporal lobe damage
- D
Conduction aphasia from arcuate fasciculus damage
Explanation
Wernicke's aphasia features fluent but semantically empty speech and impaired comprehension, arising from damage to the left posterior superior temporal gyrus.