244Upperextremityex4

244Upperextremityex4 - Arm (Brachium) Bone: 1. Humerus...

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Arm (Brachium) Bone: 1. Humerus (review) Forearm (Antebrachium) Bones: 1. Ulna - Proximal extremity, shaft, distal extremity 2. Radius - Proximal extremity, shaft, distal extremity
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Condyle
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Proximal Ulna
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Proximal Radius Fovea of Head of Radius
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Arm - Anterior Compartment Muscles - Coracobrachialis - Biceps brachii - Long head - Short head - Brachialis
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Arm - Posterior Compartment - Triceps brachii - long head - medial head - lateral head
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Elbow (Cubitus) - 3 Joints in 1 Capsule - Humeroulnar - Humeroradial - Proximal - radioulnar
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Humeroulnar - tight fit between trochlea and trochlear notch = stability, hinge joint - Flexion/Extension is primary, minor abduction/adduction of joint with pronation/supination - carrying angle - frontal plane angle made be elbow in extension - accessory movements - full extension (demo) Humeroradial - between radial head (fovea) and capitulum - resists valgus forces - roll and slide over capitulum during flex/extend
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Radioulnar Joints - radius, ulna bound by interosseous membrane and proximal and distal radioulnar joints - rotation of radius about ulna = pronate/supinate Proximal Radioulnar Joint - radial head held against proximal ulna by a fibro-osseous ring (formed by radial notch and annular ligament) - annular lig attaches to ulnar on either side of radial notch - internal circumference of annular lig lined with cartilage to reduce friction
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Elbow Ligaments Fibrous capsule surrounds elbow joint. Capsule is strengthened by strong collateral ligaments on each side. Radial collateral lig - from lateral epicondyle and blends with annular ligament of radius Annular lig of radius - encircles and holds head of humerus in radial notch of ulna, permits pronation/supination Ulnar collateral lig - from medial epicondyle to coronoid process of ulna (3 bands - anterior, posterior, oblique)
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Elbow Ligaments
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Proximal - review Intermediate - thin fibrous sheet connecting medial & lateral borders of radius & ulna
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This note was uploaded on 11/10/2011 for the course KNH 244L taught by Professor Omolewu during the Spring '10 term at Miami University.

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244Upperextremityex4 - Arm (Brachium) Bone: 1. Humerus...

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