Which term names the space where a hematoma forms between the dura and arachnoid layers?

• A. Epidural hematoma
• B. Subarachnoid hemorrhage
• C. Intraparenchymal
• D. Subdural hematoma

Answer: (D)

Understanding the spaces between the brain’s protective coverings is essential. The meninges consist of three layers: dura mater on the outside, arachnoid mater in the middle, and pia mater on the brain surface. A hematoma that forms in the space between the dura and the arachnoid layers—below the dura—is called a subdural hematoma. The term reflects this location, whereas other terms describe different spaces: an epidural hematoma is between the skull and the dura; a subarachnoid hemorrhage fills the space between the arachnoid and pia; and an intraparenchymal bleed occurs inside the brain tissue itself. Subdural hematomas often arise from tearing bridging veins and can present with gradual symptoms as blood accumulates.