⭐ Pectoralis major muscle anatomy ⭐
Origins: Anterior surface & medial half of clavicle, anterior surface of sternum, superior six costal cartilages, aponeurosis of the external oblique muscle
Insertion: Lateral crest of bicipital groove
Actions: Humerus adduction, humerus medial rotation, humerus flexion (clavicular head), humerus extension (sternocostal head)
Innervation: Medial and lateral pectoral nerves (C5T1)
Blood supply: Pectoral branch of the thoracoacromial trunk

Chapters:
0:00 Intro
0:15 Pectoralis major location
0:17 Origin
1:14 Insertion
2:01 Muscle actions overview
2:19 Muscle action adduction
2:35 Muscle action internal/medial rotation
2:59 Muscle action humeral elevation
3:18 Muscle action humeral extension
4:25 Outro
4:35 Pectoralis major origin, insertion, action overview image

⭐ If you would like some help memorising this information, be sure to check out the free muscle study flashcards on bodyworksprime.com

⭐ More details about the pectoralis major muscle can be found at: https://bodyworksprime.com/pectoralis...

⭐ Looking for a video on the pec minor muscle? Then check out my pectoralis minor video:    • Pectoralis Minor Anatomy: Origin, Ins...  

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