Pectoralis Minor

shoulder-muscles-axillary-nerve-2-labeledMuscle Origin

Ribs 3-5 to the Coracoid Process of the Scapula.
Third to fifth ribs, near their costal cartilages.

Insertion

Medial border and superior surface of the coracoid process of the scapula.

Via a tendon to the medial aspect of the coracoid process of the scapula. Part or all of the tendon may transverse this process and continue into the coracoacromial ligament.

Action

Abducts the scapula and rotates it downward

Stabilizes the scapula by drawing it inferiorly and anteriorly against the thoracic wall, raises ribs in inspiration.

Innervation – Nerve control

Medial pectoral nerve (C8, T1)

The medial pectoral nerve (medial anterior thoracic) arises from the medial cord (sometimes directly from the anterior division of the inferior trunk) of the brachial plexus and through it from the eighth cervical and first thoracic roots.

It passes behind the first part of the axillary artery, curves forward between the axillary artery and vein, and unites in front of the artery with a filament from the lateral nerve. Wiki

Artery

Pectoral branch of the thoracoacromial trunk

The thoracoacromial artery (acromiothoracic artery; thoracic axis) is a short trunk that arises from the forepart of the axillary artery, its origin being generally overlapped by the upper edge of the Pectoralis minor. Wiki

Antagonist muscles

 

Pictures of muscles

 

Trigger Point Referrals

 

Stretching description

 

Exercises

 

Injuries

 

Treatment

 

Additional Resources
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