Pectoral Muscles: Area, Innervation & Function - Human Anatomy | Kenhub

This video covers the definition, innervation and functions of the two pectoral muscles: pectoralis major and minor. Test yourself with our quiz on http://khub.me/r7xqv

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The pectoral muscles are two muscles that connect the front of the chest with the bones of the upper arm and shoulder: the pectoralis major muscle, also called the 'breast stroke muscle' and the pectoralis minor muscle. They have their origins at the ribs, sternum and clavicle and insert at the humerus and scapula. The innervation of the pectoral muscles is provided by the medial and lateral pectoral nerves from the brachial plexus.

The main functions of the pectoral muscles involve the adduction and anteversion of the shoulder joint (pectoralis major) and abduction and depression of the scapula (pectoralis minor). With a fixed scapula, the pectoralis minor action also involves elevating the ribs, making it an accessory inspiratory muscle.

In this video tutorial we go over the anatomy of the pectoral muscles including their location, innervation and functions.

0:11 pectoral muscles location
0:32 innervation of the pectoral muscles
0:55 pectoralis major function
1:25 pectoralis minor function

Want to test your knowledge on the muscles of the ventral trunk wall? Take this quiz: https://khub.me/6jwna

Read more on the muscles and movements of the upper extremity, to get a more profound understanding of the mobility in our arms and which muscles are responsible for it: https://khub.me/cu3l3

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