[2] The shape and form of the ligament have been found in humans cadavers to vary from a rounded cord to a flat membrane.

[5] It has been suggested to strengthen the interosseus membrane proximally,[1] provide restraint for the rotatory movements of the forearm,[3] or that the ligament may stop bone bending and preventing buckling failure.

[5] One recent comparative study upon primates concluded: The oblique cord does not limit supination, nor does it seem to have a role in preventing radial buckling failure or reducing bending strain.

The oblique cord may simply be an additional tie between the radius and ulna aiding other soft tissue structures such as the annular ligament and interosseous membrane.

Additionally, the oblique cord may prevent anterior shearing of the proximal radius under extreme compressive loads.