Structures

  • Proximal radioulnar joint
  • Annular ligament
  • Quadrate ligament
  • Oblique cord
  • Interosseous membrane

NameOriginInsertionFunction
Annular ligament of radius-Anterior and posterior radial notch of
ulna
- Encircles head of the radius- Stabilise proximal radioulnar joint
Quadrate ligament- Square shaped
- Below annular ligament
- Covers the synovial membrane
- As origin describes- Stabilise the proximal radioulnar joint
Oblique cord- Often absent
- Syndesmotic ligamentous band
- Arises from ulna tuberosity
- Proximal medial radius- Stabilise the proximal radioulnar joint
Interosseous membrane- Fibrous sheet spans the space
between the radius and ulna
- Arises as interosseous border of ulna
- Interosseous border of radius- Stabilise the proximal radioulnar joint
- Provides surface for muscle attachments