Following a stroke, a client exhibits expressive aphasia. Which lobe of the brain is likely affected?

Expressive aphasia, often associated with difficulties in speech production while comprehension may remain intact, is primarily linked to damage in Broca's area, which is typically located in the frontal lobe of the brain. This area is crucial for language processing and speech production. When a stroke impacts the frontal lobe, individuals may struggle to form words and sentences, leading to the characteristic expressions seen in expressive aphasia.

In contrast, the other lobes have different primary functions. The occipital lobe is primarily responsible for visual processing; damage there would impact vision rather than language ability. The parietal lobe is associated with processing sensory information and spatial orientation. The temporal lobe, while relating to auditory processing and some aspects of language comprehension (especially in Wernicke's area), does not primarily govern speech production, which is why it is less relevant to the condition of expressive aphasia specifically. Thus, the frontal lobe is the correct answer, as it plays a central role in the production of speech.