Annular ligament
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226105870
2008-07-16T21:09:31Z
GameKeeper
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{{Otheruses2|Annular ligament}}
{{Infobox Ligament |
Name = Annular ligament |
Latin = ligamentum annulare radii |
GraySubject = 85 |
GrayPage = 324 |
Image = Gray331.png |
Caption = Capsule of elbow-joint (distended). Anterior aspect. |
Image2 = Gray333.png |
Caption2 = Annular ligament of [[radius]], from above. The head of the radius has been sawn off and the bone dislodged from the ligament. |
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To = |
MeshName = |
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DorlandsPre = l_09 |
DorlandsSuf = 12491593 |
}}
The '''Annular Ligament''' ('''orbicular ligament''') is a strong band of fibers, which encircles the head of the [[radius]], and retains it in contact with the [[radial notch]] of the [[ulna]].
It forms about four-fifths of the [[osseo-fibrous ring]], and is attached to the anterior and posterior margins of the radial notch; a few of its lower fibers are continued around below the cavity and form at this level a complete fibrous ring.
Its upper border blends with the anterior and posterior ligaments of the [[Elbow-joint|elbow]], while from its lower border a thin loose membrane passes to be attached to the neck of the radius; a thickened band which extends from the inferior border of the annular ligament below the radial notch to the neck of the radius is known as the [[quadrate ligament]].
The superficial surface of the annular ligament is strengthened by the [[radial collateral ligament of the elbow]], and affords origin to part of the [[supinator]].
Its deep surface is smooth, and lined by [[synovial membrane]], which is continuous with that of the elbow-joint.
==Additional images==
<gallery>
Image:Gray420.png|The Supinator.
</gallery>
==External links==
* {{SUNYAnatomyFigs|10|5a|02}}
{{Gray's}}
{{Joints of upper limbs}}
[[Category:Ligaments]]
[[Category:Thoracic limb anatomy]]
{{ligament-stub}}