Scapula: Posterior view (Latin)

The facies posterior scapulae is convex and marked by a protruding ridge of bone known as the spina scapulae. This ridge unevenly separates the facies posterior scapulae into two divisions: the fossa supraspinata and the much bigger, fossa infraspinata. The m. supraspinatus sits within the fossa supraspinata, while the fossa infraspinata is occupied by the m. infraspinatus and m. teres minor of the mm. cuffiae musculotendineae. The spina scapulae begins at the radix spinae scapulae and extends and widens to form the acromion scapulae. The acromion articulates with the clavicula to form the art. acromioclavicularis. The spina and acromion scapulae serve as important attachment points for muscles of the back and shoulder and function as levers for these muscles, particularly the m. trapezius.Connecting the fossae supraspinata and infraspinata together is the incisura spinoglenoidea. The a. suprascapularis and n. suprascapularis travel through this notch to supply structures of the scapular region.