subscapular fossa

The costal or ventral surface of the scapula presents a broad concavity, the subscapular fossa.

The Subscapular aponeurosis is a fibrous membrane that lines the subscapular fossa of the scapula.

It arises from its medial two-thirds and from the lower two-thirds of the groove on the axillary border (subscapular fossa) of the scapula.

The subscapular artery branches from the third part of the axillary and supplies the subscapularis muscle in the subscapular fossa as far as the inferior angle.

The subscapularis is a large triangular muscle which fills the subscapular fossa and inserts into the lesser tubercle of the humerus and the front of the capsule of the shoulder-joint.

As the artery passes over the superior transverse scapular ligament, it sends a branch into the subscapular fossa, where it ramifies beneath the subscapularis, and anastomoses with the subscapular artery and with the dorsal scapular artery.