HN210 Lecture Notes - Lecture 7: Olecranon Fossa, Humerus, Shoulder Joint
Document Summary
2 types of movement between are and forearm: flexion/ extension, supination/ pronation (bringing arms to medial line and then rotate elbow) holding a bowl of soup throwing it away. Muscles: flexor (anterior): innervation = musculocutaneous nerve. Innovates muscles in the arm and skin of the forearm: extensors (posterior): innervation = radial, (cid:374)ote (cid:373)edia(cid:374) (cid:374)erve does(cid:374)"t have a(cid:374)y (cid:374)erves i(cid:374) the ar(cid:373) Left is anterior (lesser tubercle is only seen in anterior view), right is posterior (because it has the olecranon fossa ) Deltoid tuberocity is half way down the lateral side groove of radial nerve is a posterior nerve it is protected by the bone. Fossae: coronoid (anterior): where coronoid process of ulna sits when forearm is flexed, olecranon (posterior: where olecranon process rests when forearms is extended, radial: above capitulum where head of radius sits when forearm is flexed. Gives shape and form to shoulder joint. At the distal end, movements are flexion and extension, supernation and pronation.
