Volar radiocarpal ligament
Encyclopedia
The palmar radiocarpal ligament (anterior ligament, volar radiocarpal ligament) is a broad membranous band, attached above to the anterior margin of the lower end of the radius
, to its styloid process
, and to the front of the lower end of the ulna
; its fibers pass downward and medialward to be inserted into the volar surfaces of the scaphoid, lunate
, and triangular bones, some being continued to the capitate.
In addition to this broad membrane, there is a rounded fasciculus, superficial to the rest, which reaches from the base of the styloid process of the ulna to the lunate and triangular bones.
Behind, it is closely adherent to the anterior border of the articular disk of the distal radioulnar articulation
.
Other sources combine the radioscaphoid and radiocapitate into a "radioscaphocapitate".
Radius (bone)
The radius is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of the wrist and runs parallel to the ulna, which exceeds it in length and size. It is a long bone, prism-shaped and slightly curved longitudinally...
, to its styloid process
Radial styloid process
The radial styloid process is a projection of bone on the lateral surface of the distal radius bone. It extends obliquely downward into a strong, conical projection. The tendon of the brachioradialis attaches at its base, and the radial collateral ligament of the wrist attaches at its apex...
, and to the front of the lower end of the ulna
Ulna
The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form and runs parallel to the radius, which is shorter and smaller. In anatomical position The ulna is one of the two long bones in the forearm, the other being the radius. It is prismatic in form...
; its fibers pass downward and medialward to be inserted into the volar surfaces of the scaphoid, lunate
Lunate
Lunate is a term meaning crescent or moon-shaped. In the specialized terminology of lithic reduction, a lunate flake is a small, crescent-shaped flake removed from a stone tool during the process of pressure flaking....
, and triangular bones, some being continued to the capitate.
In addition to this broad membrane, there is a rounded fasciculus, superficial to the rest, which reaches from the base of the styloid process of the ulna to the lunate and triangular bones.
Relations
It is in relation, in front, with the tendons of the Flexor digitorum profundus and Flexor pollicis longus.Behind, it is closely adherent to the anterior border of the articular disk of the distal radioulnar articulation
Distal radioulnar articulation
The distal radioulnar articulation is a pivot-joint formed between the head of the ulna and the ulnar notch on the distal radius.-Ligaments:The articular surfaces are connected together by the following ligaments:...
.
Components
Some sources break down the components of the ligament as follows: radiolunate, radiocapitate, radiotriquetral, and radioscaphoid.Other sources combine the radioscaphoid and radiocapitate into a "radioscaphocapitate".