Anatomy After mastectomy, patient is NOT able to extend, adduct and internally rotate the arm. Nerve supply to which of the following muscles is damaged:- A Pectoralis major B Teres minor C Latissimus dorsi D Long head of Triceps 💡 Explanation After mastectomy, patient is NOT able to extend, adduct and internally rotate the arm. Nerve supply to which of the following muscles is damaged:- ✓ Correct Answer: C. Latissimus dorsi