Citation, DOI and article data
The glenoid labrum is a fibrocartilaginous structure that attaches as a rim to the articular cartilage of the glenoid fossa and serves to deepen and increase the surface area. In this capacity, it acts as a static stabilizer of the glenohumeral joint, preventing dislocation and subluxation at the extremes of the range of motion.
The glenoid labrum is approximately 4 mm thick and is round or triangular in cross-section.
The capsule of the glenohumeral joint attaches to the glenoid labrum. The glenoid labrum is continuous with:
- superiorly: tendon of the long head of biceps brachii
- anterior band of the inferior glenohumeral ligament
- middle glenohumeral ligament (variably)
Blood supply and innervation
The outer glenoid is vascular and the inner glenoid is avascular 4. See glenohumeral joint for further details of named vessels and nerves.
The glenoid labrum can be described in two ways 4:
- clock face
- 12 o'clock: superior
- 3 o'clock: anterior
- 6 o'clock: inferior
- 9 o'clock: posterior
- 1. De Maeseneer M, Van Roy F, Lenchik L et-al. CT and MR arthrography of the normal and pathologic anterosuperior labrum and labral-bicipital complex. Radiographics. 2000;20 Spec No (suppl 1): S67-81. Radiographics (full text) - Pubmed citation
- 2. Mandell J. Core Radiology. Cambridge University Press. (2013) ISBN:1107679680. Read it at Google Books - Find it at Amazon
- 3. Brukner P, Khan K. Clinical Sports Medicine Third Revised Edition. Springer. (2010) ISBN:1441959726. Read it at Google Books - Find it at Amazon
- 4. De Coninck T, Ngai SS, Tafur M, Chung CB. Imaging the Glenoid Labrum and Labral Tears. Radiographics : a review publication of the Radiological Society of North America, Inc. 36 (6): 1628-1647. doi:10.1148/rg.2016160020 - Pubmed