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Elbow Intro

Elbow Introduction PPT

What 3 joints make up the elbow? Ulnohumeral Radiohumeral Proximal Radioulnar
Which of the elbow joints are included in the elbow capsule? All of them
What are the primary motions of each elbow joint? Ulnohumeral: primary hinge (flex/ext) Radiohumeral & Proximal Radioulnar: rotation/pivoting motions
The Elbow Capsule Follows perimeter of elbow, distally blends with annular lig; Ant. portion taut with extension; Post. portion taut with flexion; Reinforced by lateral & medial collateral ligs
What is the Medial (Ulnar) Collateral Ligament made up of? Anterior Bundle Posterior Bundle Transverse Ligament
Anterior Band of UCL Inserts into anteromedial portion of coronoid of ulna Controls valgus forces
Posterior Band of UCL Originates posterior & inferior to axis of rotation & inserts into medial semilunar notch of proximal ulna; Becomes taut from 60-90 deg flexion
Transverse Band of UCL Doesn't cross elbow joint Doesn't contribute to joint stability
Lateral Ligament Structures Lateral UCL Radial collateral ligament- radial head to humerus Annular Ligament- encircles radial head
Lateral UCL Spans radiocapitellar joint Superficial to annular ligament Resists varus stress
Radial Collateral Ligament Originates from lateral epicondyle, inserts into annular ligament Origin close to axis Remains taut throughout ROM
Annular Ligament Fibro-osseous ring that stabilizes the radial head; Originates & inserts on ant/post margins of lesser sigmoid notch
Anterior Elbow Pain causes Biceps tendonitis Biceps rupture at the elbow (lose supination strength, some flexion, more problematic if torn at distal insertion) Bicipital bursitis Ant. capsule Pronster Syndrome- median n.
Posterior Elbow Pain causes Olecranon impingement More a person throws, elbow becomes loose & forms osteophytes, so when throwing with increased valgus, rubs more on posterior medial elbow
Medial Elbow Pain causes Epicondylitis If jts are loose, ulnar n may sublux Ulnar n s/sx can come from swelling, which causes chemical irritation- medial epicondylitis for example
Lateral Elbow Pain causes Lateral Epicondylitis Post. interosseous n. compression syndrome (radial n.) Radial head fx Radiocapitellar chrondromalacia Osteochondritis dissecans of capitellum
Created by: 1190550002
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