Anatomy A person is not able to extend his metacarpophalangeal joint. This is due to injury to which nerve : A Ulnar nerve B Radial nerve injury C Median nerve injury D Posterior Introsseus nerve injury 💡 Explanation A person is not able to extend his metacarpophalangeal joint. This is due to injury to which nerve : ✓ Correct Answer: D. Posterior Introsseus nerve injury