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Struthers' ligament
Struthers' ligament is a feature of human anatomy, consisting of a band of connective tissue that runs between the shaft of the upper arm bone, the humerus, and a projection at the same bone's lower end.
It was highlighted by John Struthers, who discussed the feature's evolutionary significance with Charles Darwin. Its incidence was estimated by Struthers at 1%, but more recently has been estimated at 13.5%. Its clinical significance arises from the fact that the median nerve and brachial artery may pass through the "arch" formed by the process and ligament over the humeral body. Within this space the nerve may be compressed leading to supracondylar process syndrome.
==Anatomy==
Struthers' ligament extends between a bony process that may arise from the shaft of the humerus and extends to the medial epicondyle of the humerus, the entire structure forming an arch. It is not a constant ligament, and can be acquired or congenital. Struthers originally reported that bony process arose at a position 3.2 to 6.4 cm from the medial condyle, being 1.2 to 1.9 cm in length, and nearer to the anterior than the medial border of the humerus. This bony process gives attachment to the eponymous ligament, which spans inferiorly and joining the line above the medial condyle.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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