Subscapular fossa of scapula to lesser tubercle of the humerus.
The front of the scapula has a broad concavity called the subscapular fossa.
Lesser tubercle of humerus.
The lesser tubercle of the humerus, although smaller, is more prominent than the greater tubercle: it is situated in front, and is directed medially and anteriorly. Above and in front it presents an impression for the insertion of the tendon of the Subscapularis. Wiki
Medially rotates arm at shoulder.
Internally rotates humerus; Assists with depression of the humeral head.
Innervation – Nerve control
Upper subscapular nerve, lower subscapular nerve.
Innervation to subscapularis is supplied by the upper and lower subscapular nerves, branches of the posterior cord of the brachial plexus. (C5-C7) Wiki
The subscapular artery, the largest branch of the axillary artery, arises at the lower border of the Subscapularis muscle, which it follows to the inferior angle of the scapula, where it anastomoses with the lateral thoracic and intercostal arteries, and with the descending branch of the dorsal scapular artery (aka deep branch of the transverse cervical artery if it arises from the cervical trunk), and ends in the neighboring muscles. Wiki
Infraspinatus, Teres minor.
Pictures of muscles
Trigger Point Referrals