anterior shoulder capsular insertion

The anterior capsular insertion, unlike the posterior aspect of the shoulder joint capsule which has a constant scapular attachment along the margins of the glenoid labrum, inserts a variable distance from the labrum.

The capsular insertions are classified as follows:

  • type I: at or very near the labrum
  • type II: just medial to the labrum, within 1 cm
  • type III: more than 1 cm medial to the labrum

Type III is associated with shoulder instability, and can either be congenital or secondary to anterior shoulder dislocation.

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