The spine of the scapula, also known as the scapular spine or simply the spine, is an anatomical structure located on the posterior surface of the scapula bone. It is a long, bony ridge that runs from the medial border towards the lateral border of the scapula, dividing it into unequal portions.
The spine of the scapula serves as an attachment point for various muscles and ligaments involved in the movement and stabilization of the shoulder joint. It provides support and strength to the scapula, aiding in the proper functioning of the upper limb.
Originating from the posterior aspect of the scapular spine is the acromion process, which forms the bony tip of the shoulder. The acromion extends laterally and curves anteriorly, ultimately articulating with the clavicle to form the acromioclavicular joint.
Additionally, the superior border of the spine forms a part of the posterior shoulder girdle, commonly referred to as the suprascapular notch or foramen. This notch allows the suprascapular nerve and vessels to pass through, supplying innervation and blood to the supraspinatus and infraspinatus muscles.
Overall, the spine of the scapula plays a crucial role in the stability, movement, and strength of the shoulder joint, making it an important landmark in understanding the anatomy and function of the upper limb.
