Acetabular labrum
| Acetabular labrum | |
|---|---|
 Hip-joint, front view. The capsular ligament has been largely removed. (Cotyloid lig. visible at center.) | |
| Details | |
| Identifiers | |
| Latin | labrum acetabuli |
| TA98 | Lua error in Module:Wikidata at line 746: attempt to index field 'wikibase' (a nil value). |
| TH | {{#property:P1694}} |
| TE | {{#property:P1693}} |
| FMA | {{#property:P1402}} |
| Anatomical terminology [[[d:Lua error in Module:Wikidata at line 865: attempt to index field 'wikibase' (a nil value).|edit on Wikidata]]] | |
The acetabular labrum (glenoidal labrum of the hip joint or cotyloid ligament in older texts) is a fibrocartilaginous ring[1][2][3] which surrounds the circumference of the acetabulum of the hip, deepening the acetabulum. The labrum is attached onto the bony rim and transverse acetabular ligament. It is triangular in cross-section (with the apex represented by the free margin).[2][3]
The labrum contributes to the articular surface of the joint[2][1] (increasing it by almost 10%[1]). It embraces the femoral head,[2] holding it firmly in the joint socket[3] to stabilise the joint. It thus also seals the joint cavity, facilitating even distribution of synovial fluid so that friction is reduced and dissolved nutrients are better distributed.[2]
The labrum is about 2 to 3 mm thick but is wider and thinner in the anterior portion. The anterior portion of the labrum is most susceptible to an acetabular labrum tear.[4]
See also
[edit | edit source]References
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- ^ Lewis, Cara L. & Sahrmann, Shirley A. (2006). "Acetabular Labral Tears". Journal of the American Physical Therapy Association. 86, 110–121.
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