The annular ligament-revisited. 2018

James W Barnes, and Vijit L Chouhan, and Nkem C Egekeze, and Caroline E Rinaldi, and Akin Cil
Department of Orthopedic Surgery, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA. Electronic address: james.barnes@gmail.com.

BACKGROUND Studies investigating the annular ligament have presented confusing information about its anatomy and nomenclature. Cadaver elbow dissections were used to clarify the anatomy and terminology of the annular ligament. METHODS Nineteen elbows were dissected (7 fresh frozen and 12 embalmed). Target structures were identified, photographed, and measured by independent observers. RESULTS There are 3 layers to the lateral elbow ligaments: the superficial lateral ulnar collateral and radial collateral ligament; a deeper layer of the superior oblique band (SOB) and inferior oblique band (IOB) of the annular ligament; and the deepest capsular layer. The annular ligament measured 9.5 ± 1.4 mm anteriorly. The SOB (15/19) was 3.9 ± 1.0 mm wide by 10.5 ± 3.8 mm long. The IOB (13/19) was 3.6 ± 1.1 mm wide by 11.4 ± 4.2 mm long. The IOB inserts onto the anterior proximal ulna rather than the supinator crest. The anterior oblique band (8/19) was 3.8 ± 1.7 mm wide. CONCLUSIONS The SOB and IOB were present in the majority of specimens. The previously described accessory lateral collateral ligament is a localized thickening on the lateral ligament complex arising from the supinator insertion independent of the IOB that attaches to the annular ligament inferiorly and distally and attaches onto the proximal anterior ulna at the bicipital fossa floor, medial to the supinator crest.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D011884 Radius The outer shorter of the two bones of the FOREARM, lying parallel to the ULNA and partially revolving around it. Radial Tuberosity,Radial Tuberosities,Tuberosities, Radial,Tuberosity, Radial
D002102 Cadaver A dead body, usually a human body. Corpse,Cadavers,Corpses
D004210 Dissection The separation and isolation of tissues for surgical purposes, or for the analysis or study of their structures. Dissections
D004551 Elbow Joint A hinge joint connecting the FOREARM to the ARM. Elbow Joints,Joint, Elbow,Joints, Elbow
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D014457 Ulna The inner and longer bone of the FOREARM. Semilunar Notch,Trochlear Notch,Ulnar Coronoid Process,Ulnar Trochlear Groove,Coronoid Process, Ulnar,Semilunar Notchs,Trochlear Groove, Ulnar,Trochlear Notchs,Ulnar Coronoid Processes,Ulnar Trochlear Grooves,Ulnas
D017885 Collateral Ligaments A number of ligaments on either side of, and serving as a radius of movement of, a joint having a hingelike movement. They occur at the elbow, knee, wrist, metacarpo- and metatarsophalangeal, proximal interphalangeal, and distal interphalangeal joints of the hands and feet. (Stedman, 25th ed) Lateral Ligaments,Ligaments, Collateral,Ligaments, Lateral,Collateral Ligament,Lateral Ligament,Ligament, Collateral,Ligament, Lateral

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