The Ulna Humerus and Ulna: Landmarks and Articulations

The Ulna Humerus and Ulna: Landmarks and Articulations

This document was created by Alex Yartsev ([email protected]); if I have used your data or images and forgot to reference you, please email me. The Ulna o the ulna is a medial long bone, the longer of the two in the forearm. Proximally, it articulates with the capitulum and trochlea of the humerus; . At the radial notch, it articulates with the head of radius o It stabilizes the forearm o The HEAD LIES DISTALLY. The Olecranon The Trochlear Notch The Coronoid Process The Radial Notch where the head of the radius goes The Tuberosity of the Ulna is where the Brachialis attaches The deep part of Supinator fossa the supinator Supinator crest attaches here Bony features include: - Olecranon - Trochlear notch - Coronoid process - Radial notch - Tuberosity of ulna - Supinator fosa - Supinator crest - Head of ulna - Ulnar styloid process The head of ulna The ulnar styloid process Humerus and ulna: landmarks and articulations o the humerus is a long bone, the largest in the upper limb o it articulates proximally with the scapula at the scapulohumeral (glenohumeral) joint o it articulates distally with the ulna at the elbow joint o the ulna and humerus articulate at the elbow joint o the articulations include: . articulation between the trochlea of the humerus and the trochlear notch of the ulna . articulation of the olecranon process and the olecranon fossa during extension . articulation of the coronoid process and the coronoid fossa during flexion o the surface landmarks include . the medial and lateral epicondyle . the olecranon . the posterior border of the ulna .

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