Understanding the Pectoralis Major Division 🌟 🔍 Anatomical Divisions: The pectoralis major is typically divided into two or three sections in the literature. 👉 Upper portion (clavicular head) 👉 Middle portion (sternal head) 👉 Lower portion (costal head) However, some consider the sternal head and costal head as one section (sternocostal part), effectively viewing the division into just two main parts. 💪Although all fibers of the pectoralis major cooperate during movements, the load on each

Pectoralis Major Muscle See the Origin & Insertion of the Pectoralis major Origin: - Clavicular head: Medial half of clavicle - Sternocostal head: Sternum and costal cartilages (1-6) - Abdominal head: Aponeurosis of external oblique muscle Insertion: - Humerus: Crest of greater tubercle 👨‍🎓Learn Anatomy with clear & engaging 3D videos! Thanks for watching The Muscle and Motion team | Muscle & Motion