USMLE® Step 1 style questions USMLE
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Contributors:Pauline Rowsome, BSc (Hons), Tanner Marshall, MS, Sam Gillespie, BSc, Jake Ryan, Filip Vasiljević, MD
CSF is a clear, watery liquid which is pumped around the spinal cord and brain, cushioning them from impact and bathing them in nutrients.
The outer membrane, the dura mater consists of two layers.
The external layer of the dura mater adheres to the inner surface of the skull.
The meningeal folds help divide the sections of the brain like the falx cerebri which separates the two hemispheres of the cerebrum, and the tentorium, which covers the cerebellum and separates it from the cerebrum.
The most common site is at the pterion which is the spot where the frontal, parietal, temporal and sphenoid bones join together.
This section of the skull is relatively thin and it’s located right above the middle meningeal artery.
When a blood vessel is damaged and there’s active bleeding, it’s called a hemorrhage, and the collection of blood that results is called a hematoma.
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