![]() ![]() (1966) Beitrag zur Persistenz der Olecranonepihyse. That have an unknown cause probably amount to about 85% to 90% of all cases.īuse, H. However, patients presenting with upper limb anomalies Occur as only one feature of a malformation syndrome these in turn frequently In some instances the cause is known.Others clearly Among the anthropoidĪpes, the gorilla has an index of 90 the orang, 100.įrom Wynne-Davies and Lamb, "There remains, however, a basicneed to searchįor the cause.of some upper limb defects by means of clinical, genetic, andĮpidemiologic evidence. The index is 74 in the Negro, 79 in the Andamanese, 81. Is higher in the infant than the adult higher in women than in men. Humeroradial index (length of radius x 100) / length of the humerus. The ratio between the lengths of the forearm and the arm is expressed by the A separate ulnar styloid processĭuplication of the radius and of the ulna has been reported and are rare. Another sesamoid (os coronoides) may alsoīe found at the tip of the coronoid process. The ulna may only be represented by an olecranon-like vestige.Ī sesamoid bone is occasionally contained within the tendon of the triceps The congenital bilateral absence of the radius in identical twins has beenĬongenital absence (partial or complete) of the ulna has also been reported. In the bicipital tendon over the radial tuberosity. Or with absence of the thumb has been reported. Peer Review Status: Internally Peer ReviewedĬongenital absence (partial or complete) of the radius with normal hand development Illustrated Encyclopedia of Human Anatomic Variation: Opus V: Skeletal Systems: ![]() Opus V: Skeletal System: Forearm: Radius and Ulna Anatomy Atlases: Illustrated Encyclopedia of Human Anatomic Variation: ![]()
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