<P> Close to the elbow , the ulna has a bony process , the olecranon process , a hook - like structure that fits into the olecranon fossa of the humerus . This prevents hyperextension and forms a hinge joint with the trochlea of the humerus . There is also a radial notch for the head of the radius , and the ulnar tuberosity to which muscles attach . </P>
<P> Close to the elbow , the ulna has a bony process , the olecranon process , a hook - like structure that fits into the olecranon fossa of the humerus . This prevents hyperextension and forms a hinge joint with the trochlea of the humerus . There is also a radial notch for the head of the radius , and the ulnar tuberosity to which muscles attach . </P>
where does the ulna articulate with the humerus
where does the ulna articulate with the humerus
olecranon fossa
olecranon fossa