Tags: Anatomical Structure, Bone.
The lower part of the lateral border of the body of the humerus forms a prominent rough margin a little curved from behind forward the lateral supracondylar ridge (or line) which presents an anterior lip for the origin of the Brachioradialis above and Extensor carpi radialis longus below a posterior lip for the Triceps brachii and an intermediate ridge for the attachment of the lateral intermuscular septum.