Subarachnoid haemorrhage involves bleeding into which space?

Subarachnoid haemorrhage involves bleeding into which space?

• A. Bleeding into the subarachnoid space.
• B. Bleeding into the cerebral cortex.
• C. Bleeding into the ventricles.
• D. Bleeding into the dura.

Answer: (A)

Bleeding location is what this item tests. Subarachnoid hemorrhage involves bleeding into the subarachnoid space—the gap between the arachnoid and pia mater that surrounds the brain and contains cerebrospinal fluid. This space is distinct from bleeding into the brain tissue itself (intraparenchymal), bleeding into the ventricles (intraventricular), or bleeding between the dura and arachnoid or skull (epidural or subdural hematomas). Recognizing that the hemorrhage is in the subarachnoid space explains why the blood surrounds CSF in imaging and presents with meningeal irritation symptoms.

Bleeding location is what this item tests. Subarachnoid hemorrhage involves bleeding into the subarachnoid space—the gap between the arachnoid and pia mater that surrounds the brain and contains cerebrospinal fluid. This space is distinct from bleeding into the brain tissue itself (intraparenchymal), bleeding into the ventricles (intraventricular), or bleeding between the dura and arachnoid or skull (epidural or subdural hematomas). Recognizing that the hemorrhage is in the subarachnoid space explains why the blood surrounds CSF in imaging and presents with meningeal irritation symptoms.