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Other Terms: Incisura ulnaris, Incisure ulnaire
This is a smooth, concave notch formed on the distomedial surface. It is covered with articular cartilage serving as the articular receptacle for the head of the ulna. The articular disc for the inferior radio-ulnar joint attaches to a ridge at the distal edge of the notch.
The term notch refers to an indentation in the margin of a bone. The Latin equivalent for this term is incisure.