Anatomy Which muscle will be paralyzed when the radial nerve is injured in just below the spiral groove? A Lateral head of triceps B Medial head of triceps C Long head bf triceps D Extensor carpi radialis longus 💡 Explanation Which muscle will be paralyzed when the radial nerve is injured in just below the spiral groove? ✓ Correct Answer: D. Extensor carpi radialis longus