Bicep Tendinitis Anatomy
To better understand shoulder tendinitis, it helps to understand the anatomy of the shoulder joint.
The shoulder joint allows motion between two major bones: the humerus and the scapula. The shoulder joint is a ball and socket joint. A depression in the scapula, known as the glenoid, provides the socket for the head of the humerus. Ligaments and muscles hold the joint together as the bones move.
The clavicle, or collar bone, connects to the scapula at the acromion, which is a bony projection off the scapula. The acromioclavicular ligaments normally surround and secure this joint.
- Cobiella CE. Shoulder pain in sports. Hosp Med. 2004 Nov;65(11):652-6. 
- Ebenbichler GR, Erdogmus CB, Resch KL, et al. Ultrasound therapy for calcific tendinitis of the shoulder. N Engl J Med. 1999 May 20;340(20):1533-8. 
- Hanchard NC, Howe TE, Gilbert MM. Diagnosis of shoulder pain by history and selective tissue tension: agreement between assessors. J Orthop Sports Phys Ther. 2005 Mar;35(3):147-53. 
- Hurt G, Baker CL Jr. Calcific tendinitis of the shoulder. Orthop Clin North Am. 2003 Oct;34(4):567-75. 
- Rochwerger A, Franceschi JP, Viton JM, Roux H, Mattei JP. Surgical management of calcific tendinitis of the shoulder: an analysis of 26 cases. Clin Rheumatol. 1999;18(4):313-6.