tuberosity of the ulna tuberosity of the ulna the tuberosity of the ulna is a rough eminence on the proximal end of the ulna. it occurs at the junction of the antero-inferior surface of the coronoid process with the front of the body. it provides an insertion point to a tendon of the brachialis (the oblique cord of the brachialis is attached to the lateral border). tuberosity of the ulnabones of left forearm. anterior aspect.tuberosity of the ulna.detailsidentifierslatintuberositas ulnaeta98a02.4.06.004ta21233fma23617anatomical terms of bone