collateral ligaments of metatarsophalangeal joints collateral ligaments of metatarsophalangeal joints the collateral ligaments of metatarsophalangeal joints are strong, rounded cords, placed one on either side of each joint, and attached, by one end, to the posterior tubercle on the side of the head of the metatarsal bone, and, by the other, to the contiguous extremity of the phalanx. collateral ligaments of metatarsophalangeal jointsdetailsidentifierslatinligamenta collateralia articulationum metatarsophalangealiumta98a03.6.10.802ta21965fma71424anatomical terminology the place of dorsal ligaments is supplied by the extensor tendons on the dorsal surfaces of the joints.