Theacetabular labrum (glenoidal labrum of the hip joint orcotyloid ligament in older texts) is a fibrocartilaginous ring[1][2][3] which surrounds the circumference of theacetabulum of the hip, deepening the acetabulum. The labrum is attached onto the bony rim andtransverse acetabular ligament. It is triangular in cross-section (with the apex represented by the free margin).[2][3]
| Acetabular labrum | |
|---|---|
 Hip-joint, front view. Thecapsular ligament has been largely removed. (Cotyloid lig. visible at center.) | |
| Details | |
| Identifiers | |
| Latin | labrum acetabuli |
| TA98 | A03.6.07.008 |
| TA2 | 1880 |
| FMA | 43521 |
| Anatomical terminology | |
The labrum contributes to the articular surface of the joint[2][1] (increasing it by almost 10%[1]). It embraces thefemoral head,[2] holding it firmly in the joint socket[3] to stabilise the joint. It thus also seals the joint cavity, facilitating even distribution ofsynovial 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 anacetabular labrum tear.[4]
See also
editReferences
edit- ^abcMoore, Keith L.; Dalley, Arthur F.; Agur, Anne M. R. (2018).Clinically Oriented Anatomy (8th ed.). Wolters Kluwer.ISBN 978-1-4963-4721-3.
- ^abcdeStandring, Susan (2020).Gray's Anatomy: The Anatomical Basis of Clinical Practice (42th ed.). New York. p. 1368.ISBN 978-0-7020-7707-4.OCLC 1201341621.
{{cite book}}: CS1 maint: location missing publisher (link) - ^abcPalastanga, Nigel; Soames, Roger (2012).Anatomy and Human Movement: Structure and Function. Physiotherapy Essentials (6th ed.). Edinburgh: Churchill Livingstone/Elsevier. p. 290.ISBN 978-0-7020-3553-1.
- ^Lewis, Cara L. & Sahrmann, Shirley A. (2006). "Acetabular Labral Tears".Journal of the American Physical Therapy Association. 86, 110–121.