Joins clavicle, ligaments, tendons Scapular spine divides dorsal scapula. Ulnar nerve squished when you bump your funny bone. Ulna medial to radius. Remember thumbs are out in anatomical position. Coronoid process is bottom of trochlear notch.
Radial notch accepts head of radius at proximal radioulnar joint.
Ulna head separated from wrist. Distal radioulnar joint near wrist. Styloid process on lateral radius stabilizes wrist. Ulnar notch at distal radius 4. Only has proximal and distal.