Which part of the brain is affected by a stroke resulting in expressive aphasia?

Expressive aphasia, also known as Broca's aphasia, is primarily associated with damage to the frontal lobe of the brain, specifically in an area known as Broca's area. This region is crucial for language production, including speech and writing. When a stroke occurs in the frontal lobe, it can impair the ability to formulate and express language, leading to difficulties in speaking fluently while often preserving the ability to understand language.

In this context, the other regions of the brain play different roles related to language and cognitive functions. The temporal lobe is more involved in language comprehension and the processing of auditory information. The parietal lobe is associated with sensory perception and integration, while the occipital lobe is primarily responsible for visual processing. None of these areas are primarily linked to expressive capabilities related to speech, which is why the appropriate selection is the frontal lobe.