Question

Arterial bleeding most commonly occurs between what two layers in the brain? Most common cause?

a) Subarachnoid space and arachnoid mater; Trauma
b) Epidural space and dura mater; Aneurysm
c) Subdural space and arachnoid mater; Hypertension
d) Subarachnoid space and pia mater; Infection

Answer 1

Arterial bleeding in the brain most commonly occurs in the subarachnoid space between the arachnoid mater and the pia mater, typically caused by an aneurysm.

Step-by-step explanation:

Arterial bleeding in the brain most commonly occurs in the subarachnoid space between the arachnoid mater and the pia mater. The most common cause of this type of bleeding is a rupture due to an aneurysm, which is a weakened area in the wall of an artery that bulges or balloons out.

Hemorrhagic stroke, where bleeding occurs within the brain, can be particularly harmful because the accumulated blood fills a region of the cranial vault and presses against the brain tissue. This physical pressure can cause loss of function and also limits blood flow to areas beyond the site of hemorrhage. Additionally, the blood-brain barrier may break down, allowing further fluid build-up that leads to edema.

Therefore, the correct answer to the question is: d) Subarachnoid space and pia mater; Aneurysm.