Annular ligament 4860233 226105870 2008-07-16T21:09:31Z GameKeeper 733794 move to {{ligament-stub}} {{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. | From = | To = | MeshName = | MeshNumber = | 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}}