Anatomical Study of Osborne^|^rsquo;s Ligament Elongation in Relation to Elbow Flexion

Abstract

To study the elongation of Osborne's ligament due to elbow flexion, 19 cadavers were dissected. The length of Osborne's ligament from its point of attachment to the humerus to its point of attachment to the ulna was measured in 10° increments of elbow flexion angle from 20° to 140°. Up to 40° 3, the length decreased slightly, and then increased almost linearly to an average of 7.62 mm or 52.3%. Osborne's ligament had a tendency to gradually elongate at a flexion angle of more than 90°. However, this distance was shortened in four elbows due to variations in the sites of attachment of Osborne's ligament.

Clarification of Eponymous Anatomical Terminology: Structures Named After Dr Geoffrey V. Osborne That Compress the Ulnar Nerve at the Elbow

“…13 In contradiction, Karatas et al described Osborne’s ligament as the CTR defined as the connective tissue between the 2 heads of the FCU muscle. 19 Other authors 7,16,17,33,38,39 described Osborne’s ligament as a connective tissue between the medial epicondyle and the olecranon. In particular, 3 authors 7,16,33 emphasized that Osborne’s ligament was distinct from Osborne’s fascia, in which Osborne’s fascia was the structure between the 2 heads of the FCU muscle.…”

“…Connective tissue between the medial epicondyle and the olecranon "Osborne's band" or a "band" of tissue causing compression Apfelberg and Larson 2 Brown et al 4 Clark 6 Dellon 9 Feindel and Stratford 11 Levy and Apfelberg 21 Macnicol 22 Mahan et al 23 O'Driscoll et al 26 O'Hara and Stone 27 Vanderpool et al 37 Blonna et al 3 Fulkerson 12 Gervasio and Zaccone 13 Osborne's ligament Alcid et al 1 Gervasio and Zaccone 13 Gonzalez et al 15 Karatas et al 19 Mazurek and Shin 25 Palmer and Hughes 32 Damert et al 7 Henry 16 Hoffmann and Siemionow 17 Kleinman 20 Polatsch et al 33 Wilson et al 38 Yamada et al 39 Osborne's fascia Catalano and Barron 5 Damert et al 7 Henry 16 Osterman and Spiess 31 Polatsch et al 33 Poujade et al 35 Goldfarb et al 14 Martinoli et al 24 Shahabpour et al 36 Note. FCU = flexor carpi ulnaris.…”

The ulnar nerve in the cubital tunnel: a foetal study

“…The ulnar nerve (UN) is the larger terminal branch of the medial cord of the brachial plexus formed by the ventral rami of C8 and T1, with occasional branches from C7 (Yamada et al, 2013 andBecker andManna, 2018). In its course, it runs on the medial side of the brachial artery in the middle-third of the arm, pierces the medial intermuscular septum with the superior ulnar collateral artery (SUCA), runs in the arcade of Struthers between the septum and the medial head of the triceps (Moore et al, 2014 andCaetano et al, 2017).…”