Anatomy What is the root value of long thoracic nerve which supplies serratus anterior muscle? A C 3,4,5 B C 5,6,7 C C 7,8 & T1 D C 2,3,4 💡 Explanation What is the root value of long thoracic nerve which supplies serratus anterior muscle? ✓ Correct Answer: B. C 5,6,7