Ribs 3-5 to the Coracoid Process of the Scapula.
Third to fifth ribs, near their costal cartilages.
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.
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
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
Pictures of muscles
Trigger Point Referrals