APEA Neurology Practice Test

Subdural hematoma results from tearing of bridging veins, causing blood to collect in the space between the dura and the brain surface. The telltale imaging finding is a crescent-shaped collection that lies along the surface of the brain, occupying the space between the dura and the cerebral cortex. This shape allows it to extend across sutures, unlike epidural bleeds, which are lens-shaped and confined between skull and dura. Other options don’t describe an imaging finding of the brain: one describes a skull-dura bleed, another is about responses to questions, and the last about retinal findings, which aren’t imaging features of a subdural bleed.