exam 4 - MS 230: EXAM 4 07/04/2010 22:36:00 ← MUCLES AND...

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Unformatted text preview: MS 230: EXAM 4 07/04/2010 22:36:00 ← MUCLES AND MOVEMENTS: ELBOW, WRIST, HAND ← ELBOW-WRIST-HAND MOTIONS ← Elbow • Flexion/extension ← Proximal radioulnar joint • Pronation/supination ← Wrist • Flexion/extension • Ulnar/radial deviation ← Fingers • Flexion/extension • Thumb abduction ← Elbow Muscles ← Anterior: all 3 have brachial in the name; all cross at the elbow; flexors • Biceps Brachii: crosses at the shoulder as well as the elbow o Origin: scapula o Insertion: radial tuberosity o Function: shoulder flexion, elbow flexion , radial-ulnar supination Bicep supinates the radial-ulnar joint because attached to radial tuberosity o Chin up vs. pull up: biceps is shortened when doing pull up (supination) and bicep is long in pronation position • Brachialis: just deep to biceps brachii o Origin : distal anterior humerus o Insertion: ulnar tuberosity o Function : elbow flexion • Brachioradialis: o Origin : lateral supracondylar ridge of humerus o Insertion : styloid process of radius (insertion distal—close to the wrist) o Function : elbow flexion **carpenters have large brachioradialis muscle used to hammer (using flexor movement; breaking of extensor movement) ← *corocoid brachii IS NOT at the elbow, but these ones (^) all cross at elbow ← Posterior: extensors; both triceps brachii and anconeus insert on olecranon process • Triceps Brachii: not involved in supination and pronation (ulna doesn't move) o Origin : Long head: infraglenoid tubercle of scapula Lateral head: proximial posterolateral humerus Medial head: distal posteromedial humerus o Insertion: olecranon process of ulna o Function: shoulder extension (*only long head involved in shoulder extension—only one attached to the should), elbow extension • Anconeus o Origin: lateral epicondyle of humerus o Insertion: olecranon process o Function: extension ← Forearm Muscles ← Anterior : ← SUPERFICIAL: all 4 star at medial epicondyle • Pronator Teres: o Origin: medial epicondyle of humerus and coronoid process of ulna o Insertion: middle lateral radius o Function: pronation; assists with elbow flexion Shortens pulls Anterior to elbow joint (flexion) Big movement arm • Palmaris Longus: muscle pops out able to see it easily (tendon at wrist) o Origin: medial epicondyle of humerus (common flexor tendon) o Insertion: palmar aponeurosis Sheet of connective tissue in your hand (protects hand structures when using a screw driver) o Function: assists with wrist flexion...
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This note was uploaded on 02/18/2011 for the course MVS 230 taught by Professor Gross during the Winter '10 term at University of Michigan.

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exam 4 - MS 230: EXAM 4 07/04/2010 22:36:00 ← MUCLES AND...

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