![spine of scapula spine of scapula](https://ars.els-cdn.com/content/image/3-s2.0-B9780128121627000114-f11-02-9780128121627.jpg)
Snapping scapula syndrome can be caused by: Popping or snapping can occur when a bursa becomes inflamed, rolls over during shoulder motion, or fails to reduce friction properly. The scapula may rub and irritate a bursa cushion. These cushions usually reduce friction between the scapula and the rib cage, or between the scapula and the muscles.
![spine of scapula spine of scapula](https://assets.cureus.com/uploads/figure/file/151428/lightbox_8b7f79f0017911ebba37499d7395f976-Pre-exogen.png)
Of the three borders, the anterior is attached to the dorsal surface of the bone the posterior, or crest of the spine, is broad, and presents two lips and an intervening rough interval.
![spine of scapula spine of scapula](https://www.getbodysmart.com/wp-content/uploads/2017/08/Scapula-Right-770x533.png)
Its inferior surface forms part of the infraspinatous fossa, gives origin to a portion of the infraspinatus, and presents near its center the orifice of a nutrient canal.Its superior surface is concave it assists in forming the supraspinatous fossa, and gives origin to part of the supraspinatus.It presents two surfaces and three borders.