accessory ligaments

ac·ces·so·ry lig·a·ments

(ak-ses'ŏr-ē lig'ă-mĕnts)
Ligaments about a joint that are in addition to the articular capsule. They may lie within or on the outside of the latter.
References in periodicals archive ?
In some affected young one, in addition to the superficial and deep digital flexor musculotendon units and their accessory ligaments, the suspensory ligament, joint capsules and collateral ligaments prevent normal extension of the joints (Stephen and Elizabeth, 2000).