Struthers' ligament

Struthers' ligament is a feature of human anatomy consisting of a band of connective tissue at the medial aspect of the distal humerus.

[3][4][5] The structure was highlighted by John Struthers, who discussed the feature's evolutionary significance with Charles Darwin.

[1] The clinical significance of this structure is due to the median nerve and brachial artery which may pass underneath the "arch" formed by the process and ligament over the humeral body.

Charles Darwin took the ligament to mean that humans and other mammals had a common ancestor, and used Struthers' work as evidence in Chapter 1 of his Descent of Man (1871).

[14][15] Struthers went on to create a museum of Comparative Anatomy filled with zoological specimens to illustrate Darwin's theory of common descent.