Bicep Tendonitis

Bicipital tendinitis is an inflammatory process of the long head of the biceps tendon and is a common cause of shoulder pain due to their position and function. The original tendon of the long portion of the biceps is inserted into the upper edge of the glenoid cavity and from there along over the humeral head, is introduced in a bone tunnel between the lesser tuberosity and the greater tuberosity, that becomes a real tunnel covered by a fibrous structure known as intertuberositario ligament. The journey through this tunnel fibroosseous can cause frictions that give rise to the appearance of tendinitis. The biceps tendon disorders can be the result of collision or an isolated as an inflammatory lesion. Other causes are secondary to overload rotator cuff injury, labral tears, and intra-articular pathology.
Frequency

Bicipital tendinitis is often diagnosed in association with rotator cuff disease as a component or shock syndrome secondary to intra-articular pathology, such as labral tears.
Functional Anatomy

As its name suggests, the proximal biceps has two heads with a common distal insertion on the radio. The long head of biceps merges with the short portion of the biceps to form the body of the biceps. This muscle is a powerful flexor and forearm supinator.
The long head of the biceps tendon lies in the humerus bicipital groove between greater and lesser tuberosity and is angled 90 ° inwards in the upper end of the slider across the humeral head to be inserted into the upper edge of the glenoid labrum and tuber supraglenoid. When the tendon passes through the bicipital groove in the humerus, is kept in position by transverse humeral ligament. This system maintains the humeral head and prevents it from sliding too far up or forward within the glenoid. The long head of the biceps tendon helps stabilize the humeral head, especially during abduction and external rotation.

Causes

Biceps tendonitis sometimes occurs in response to other shoulder problems, including:
    Repition
    rotator cuff tears
    Shoulder Impingement
    shoulder instability
Tendinitis and rotator cuff tears
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The tendon of the long head of the biceps passes through the bicipital groove in a fibrous sheath between the subscapularis and supraspinatus tendons. This relationship causes the biceps tendon undergoes degenerative changes and attrition that are associated with rotator cuff disease because the biceps tendon corresponding shares the inflammatory process within the joint suprahumeral. When the rotator cuff is torn, the humeral head is free to move too far up and forward in the glenoid can affect the shoulder and biceps tendon. The damage may begin to weaken the biceps tendon and cause it to swell.
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Shoulder impingement (impingement)
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In shoulder impingement, the soft tissues between the humeral head and the top of the shoulder blade (acromion) are crushed by compression on certain arm motions.
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The fully abducted humeral head positioned at the insertion of the rotator cuff and biceps tendon under the acromion. External rotation of the humerus at or above the horizontal level suprahumerales these structures compresses against the anterior acromion. The repetitive irritation leads to inflammation, edema, microscopic tears and degenerative changes. Examination of the tissues in these cases often show signs of degeneration. A tendon degeneration leads to loss of the normal arrangement of the collagen fibers which form the tendon. Some of the individual involved tendon fascicles are disrupted due to the degeneration, other fibers break, and the tendon loses strength. When this happens in the biceps tendon can cause inflammation, or even shatter.