In the pterygomandibular space, what is the order of structures encountered from ANTERIOR to POSTERIOR?

Correct answer: A. Lingual nerve, inferior alveolar nerve, inferior alveolar artery

• A. ✅ CORRECT — The LINGUAL nerve lies most anteriorly and medially, the INFERIOR ALVEOLAR nerve next, and the inferior alveolar ARTERY (with the vein) posterior to the nerve. This is why a needle that is deposited too shallow can anesthetize the lingual nerve alone, and why aspiration is essential as the needle approaches the vessels.
• B. ❌ The artery does not lie between the two nerves.
• C. ❌ The artery is posterior to the nerves, not anterior to them.
• D. ❌ This reverses the two nerves — the lingual nerve is the anterior structure.

Note: ⚑ Different sources describe the relationship as anterior-posterior or medial-lateral. The consistent point: LINGUAL nerve is encountered first (anteromedial), then IAN, then the vessels posteriorly.