Which of the following is incorrect about cranial meninges?
Outside the skull, the brain is covered by cranial meninges.
— Concept: This question tests your knowledge of the protective coverings of the brain, specifically the cranial meninges…Concept: This question tests your knowledge of the protective coverings of the brain, specifically the cranial meninges and their location relative to the skull.
Why (A) is incorrect: The statement says that the brain is covered by cranial meninges outside the skull. This is incorrect. The cranial meninges (dura mater, arachnoid mater, and pia mater) are located inside the skull, directly surrounding and protecting the brain tissue.
Why other options are correct:
- (B) Dura mater, an outer covering: The dura mater is indeed the outermost, tough, fibrous layer of the cranial meninges.
- (C) A very thin middle layer called arachnoid: The arachnoid mater is the thin, web-like middle layer, situated between the dura mater and pia mater.
- (D) An inner layer (which is in contact with the brain tissue) called pia mater: The pia mater is the innermost, delicate layer that closely adheres to the surface of the brain, following its contours.
Common Mistake: Students might confuse the order of meninges or their location relative to the skull vs. the brain itself.
NEET Tip / Mnemonic: Remember the order of meninges from outside to inside as DAP: Dura mater, Arachnoid mater, Pia mater.
Correct Answer: (A)
Outside the skull, the brain is covered by cranial meninges.