head of ulna

(redirected from caput ulnae)

head of ul·na

[TA]
the small rounded distal extremity of the ulna articulating with the ulnar notch of the radius and the articular disk.
Synonym(s): caput ulnae [TA]
References in periodicals archive ?
This process progresses to the development of caput ulnae syndrome in which the carpus subluxates volarly and supinates while the ulnar head displaces dorsally.
In 1963, Backdahl (28) labeled these changes along with decreased range of motion and possible extensor tendon ruptures the "caput ulnae."
(28.) Backdahl M: The caput ulnae syndrome in rheumatoid arthritis: a study of the morphology, abnormal anatomy and clinical picture.