Help!
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| Wrist movements | Flexion: Anterior muscle
Extension:Posterior muscle
Radial deviation: lateral muscle
Ulnar deviation: medial muscle.
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| Proximal attachments | Flexors: all originate at the medial epicondyle(medial muscle mass)
Extensor: all originate at lateral epicondyle(lateral muscle mass)
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| Distal attachments | All attach to a metacarpal
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| The 3rd metacarpal | The midline of hand
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| Anterior muscles | (Flexor Carpi radials, palmaris, longus
Flexor Carpi ulnaris) work together to do straight wrist flexion.
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| Posterior muscles | (Extensor Carpi radialis Longus, Extensor Carpi radialis, Extensor Carpi ulnaris) = straight wrist extension.
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| Muscle compartments | Brachioradialis divides the extensor and flexors/
The belly of extensor Carpi radialis longus lies next to brachioradialis.
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| Radial and ulnar deviation: Flexor Carpi radialis and extensor Carpi radialis longus will produce | Pure radial deviation
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| Radial and ulnar deviation: Flexor Carpi ulnaris and extensor Carpi ulnaris will produce | Pure Ulnar deviation
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| Radial deviation | Flexor Carpi radialis
Extensor Carpi radialis longus and brevis
(Flexion and extension component is neutralized) = Get pure radial deviation.
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| Ulnar deviation | Flexor Carpi ulnaris
Extensor Carpi ulnaris
(The flexion and extension component) Get pure ulnar deviation.
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| Finger and thumb muscles | Extrinsic muscles=muscle belly outside joint: assist with wrist motion-primary action on digit.
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| Distal radioulnar joint is where | Head of ulna articulates with ulnar notch on radius dismally
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| Proximal and distal radioulnar joints are: | Mechanically linked and motion at one is always accompanied by motion at the other.
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| Pronation and supination occur because | Radius crosses ulna at radioulnar joint: it slides over ulnar head.
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Created by:
Kenito71