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Post. Forearm

Gross Anatomy of the Posterior Forearm

QuestionAnswer
Brachioradialis Prox. Lateral supracondylar ridge of humerus
Brachioradialis Dist. Base of styloid process of radius
Brachioradialis Act. Elbow Flexion
Brachioradialis Inn. Radial Nerve
Supinator Prox. Lateral epicondyle of humerus
Supinator Dist. Lateral surface of upper 1/3 of radius
Supinator Act. Acts alone in slow supination
Supinator Inn. Radial Nerve
ECR Longus Prox. Lower 1/3 of lateral humerus
ECR Longus Dist. Base of 2nd metacarpal
ECR Longus Act. Wrist extension and ABduction
ECR Longus Inn. Radial Nerve
ECR Brevis Prox. Lateral epicondyle of humerus
ECR Brevis Dist. Base of 3rd metacarpal
ECR Brevis Act. Wrist flexion and ABduction
ECR Brevis Inn. Radial Nerve
ECU Prox. Lateral epicondyle of humerus
ECU Dist. Base of 5th metacarpal
ECU Act. Wrist extension and ADduction
ECU Inn. Deep Radial Nerve
Extensor Digitorum Prox. Lateral epicondyle of humerus
Extensor Digitorum Dist. Middle part attaches to middle phalanx base and 2 Lateral parts split and attach to distal phalanx
Extensor Digitorum Act. Extends 4 fingers at DIP joint
Extensor Digitorum Inn. Deep Radial Nerve
Adductor Pollicis Longus Prox. Proximal dorsal surface of radius and ulna
Adductor Pollicis Longus Dist. Radial side of 1st metacarpal
Adductor Pollicis Longus Act. ABducts thumb
Adductor Pollicis Longus Inn. Deep Radial Nerve
Extensor Pollicis Brevis Prox. Distal radius
Extensor Pollicis Brevis Dist. Posterior proximal phalanx of thumb
Extensor Pollicis Brevis Act. Extends proximal phalanx of thumb
Ext. Digiti Minimi Prox. Common tendon of ext. digitorum
Ext. Digiti Minimi Dist. Ext. Digitorum tendon at proximal pinky
Ext. Digiti Minimi Act. Extends proximal phalanx of pinky
Ext. Digiti Minimi Inn. Deep Radial Nerve
Extensor Indicis Prox. Dorsal surface of lower 1/2 of ulna
Extensor Indicis Dist. Ulnar side of ext. digitorum
Ext. Indicis Act. Extends and assists w/ ADduction of proximal phalanx of index finger
Ext. Indicis Inn. Deep Radial Nerve
Ext. Pollicis Longus Prox. Posterior Ulna
Ext. Pollicis Longus Dist. Posterior base of distal phalanx
Ext. Pollicis Longus Act. Extends distal phalanx of thumb
Ext. Pollicis Longus Inn. Deep Radial Nerve
Lateral Border of Anatomical Snuffbox ABductor Pollicis Longus and Extensor Pollicis Brevis
Medial Border of Anatomical Snuffbox Ext. Pollicis Longus
Floor of Anatomical Snuffbox Scaphoid Bone
Roof of Anatomical Snuffbox Skin and Fascia
Created by: frankfrank05
 

 



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