Physiology The perivascular space (Virchow-Robin space) in the brain is formed between the wall of small penetrating vessels and which structure? A Dura mater B Arachnoid membrane C Pia mater D Choroid plexus 💡 Explanation The perivascular space (Virchow-Robin space) in the brain is formed between the wall of small penetrating vessels and which structure? ✓ Correct Answer: C. Pia mater