Gross Anatomy of the Posterior Forearm
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| Brachioradialis Prox. | Lateral supracondylar ridge of humerus
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| Brachioradialis Dist. | Base of styloid process of radius
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| Brachioradialis Act. | Elbow Flexion
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| Brachioradialis Inn. | Radial Nerve
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| Supinator Prox. | Lateral epicondyle of humerus
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| Supinator Dist. | Lateral surface of upper 1/3 of radius
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| Supinator Act. | Acts alone in slow supination
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| Supinator Inn. | Radial Nerve
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| ECR Longus Prox. | Lower 1/3 of lateral humerus
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| ECR Longus Dist. | Base of 2nd metacarpal
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| ECR Longus Act. | Wrist extension and ABduction
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| ECR Longus Inn. | Radial Nerve
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| ECR Brevis Prox. | Lateral epicondyle of humerus
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| ECR Brevis Dist. | Base of 3rd metacarpal
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| ECR Brevis Act. | Wrist flexion and ABduction
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| ECR Brevis Inn. | Radial Nerve
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| ECU Prox. | Lateral epicondyle of humerus
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| ECU Dist. | Base of 5th metacarpal
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| ECU Act. | Wrist extension and ADduction
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| ECU Inn. | Deep Radial Nerve
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| Extensor Digitorum Prox. | Lateral epicondyle of humerus
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| Extensor Digitorum Dist. | Middle part attaches to middle phalanx base and 2 Lateral parts split and attach to distal phalanx
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| Extensor Digitorum Act. | Extends 4 fingers at DIP joint
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| Extensor Digitorum Inn. | Deep Radial Nerve
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| Adductor Pollicis Longus Prox. | Proximal dorsal surface of radius and ulna
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| Adductor Pollicis Longus Dist. | Radial side of 1st metacarpal
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| Adductor Pollicis Longus Act. | ABducts thumb
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| Adductor Pollicis Longus Inn. | Deep Radial Nerve
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| Extensor Pollicis Brevis Prox. | Distal radius
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| Extensor Pollicis Brevis Dist. | Posterior proximal phalanx of thumb
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| Extensor Pollicis Brevis Act. | Extends proximal phalanx of thumb
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| Ext. Digiti Minimi Prox. | Common tendon of ext. digitorum
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| Ext. Digiti Minimi Dist. | Ext. Digitorum tendon at proximal pinky
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| Ext. Digiti Minimi Act. | Extends proximal phalanx of pinky
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| Ext. Digiti Minimi Inn. | Deep Radial Nerve
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| Extensor Indicis Prox. | Dorsal surface of lower 1/2 of ulna
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| Extensor Indicis Dist. | Ulnar side of ext. digitorum
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| Ext. Indicis Act. | Extends and assists w/ ADduction of proximal phalanx of index finger
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| Ext. Indicis Inn. | Deep Radial Nerve
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| Ext. Pollicis Longus Prox. | Posterior Ulna
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| Ext. Pollicis Longus Dist. | Posterior base of distal phalanx
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| Ext. Pollicis Longus Act. | Extends distal phalanx of thumb
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| Ext. Pollicis Longus Inn. | Deep Radial Nerve
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| Lateral Border of Anatomical Snuffbox | ABductor Pollicis Longus and Extensor Pollicis Brevis
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| Medial Border of Anatomical Snuffbox | Ext. Pollicis Longus
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| Floor of Anatomical Snuffbox | Scaphoid Bone
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| Roof of Anatomical Snuffbox | Skin and Fascia
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