Muscle facts about the pectoralis major: origin, insertion, innervation and function. Learn more about the muscles of the ventral trunk with our quiz at http://khub.me/sjlgz

Oh, are you struggling with learning anatomy? We created the ★ Ultimate Anatomy Study Guide ★ to help you kick some gluteus maximus in any topic. Completely free.
Download yours today: https://khub.me/lqv8j

The pectoralis major muscle is a strong, fan-shaped muscle on the ventral trunk, performing actions in the shoulder joint. It decisively shapes the surface anatomy of the breast and participates in forming the anterior wall of the axilla. The pectoralis major muscles receives its nerve supply by the medial and lateral pectoral nerves.

The muscle can be subdivided into three parts, due to its several origin points:
Clavicular part
Sternocostal part
Abdominal part

Its fibers insert at the crest of the greater tuberosity (the lateral lip of bicipital groove) of the humerus. Upon contraction, the pectoralis major facilitates various movements in the shoulder joint.

In this video we will take a look at all of these muscle facts, the origin, insertion, innervation and functions.

0:24 innervation by the medial and lateral pectoral nerve
0:34 division into three parts (clavicular, sternocostal, abdominal)
0:56 insertion at the crest of the greater tubercle of the humerus
1:28 functions in the shoulder joint

Want to test your knowledge on the origins, insertions, innervation and functions of the muscles of the ventral trunk?
Take this quiz: https://khub.me/6mxua

Read about the pectoralis major's little brother in order to finish the topic of the pectoral muscles with our free article: https://khub.me/51yzt

For more engaging video tutorials, interactive quizzes, articles and an atlas of Human anatomy and histology, go to https://khub.me/poqk9