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Annular Ligament of Radius
Connective Tissue

Annular Ligament of Radius

Ligamentum anulare radii

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Anatomical Relations

The annular ligament attaches to the anterior margin of the radial notch of the ulna. This attachment forms a loop or a ring that holds the head of the radius against the ulna; this arrangement allows the head of the radius to rotate within the ligament (i.e., during pronation and supination).

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Structure

The annular ligament of the radius is a strong band that wraps around the head of the radius. Its deep surface is lined with cartilage, where it is in contact with the radial head (Standring, 2016).

Function

The annular ligament of the radius is the principal stabilizer of the proximal radioulnar joint.

References

Standring, S. (2016) Gray's Anatomy: The Anatomical Basis of Clinical Practice. Gray's Anatomy Series 41st edn.: Elsevier Limited.

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Radius Bone

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In healthy males, radial bone mineral content (BMC) decreases by 1% per year between 30 and 87 years of age, whereas vertebral BMC decreases by 2.3% per year.

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