Posterior Forearm Muscles Flashcards
Brachioradialis (attachments)
Lateral supracondylar ridge to styloid of the radius
Brachioradialis (actions)
Elbow flexion
Brachioradialis (innervation)
Radial nerve (C5-6)
Extensor Carpi Radialis Longus (attachments)
Lateral supracondylar ridge to base of 2nd metacarpal
Extensor Carpi Radialis Longus (actions)
Extend & radial deviation of hand @ wrist & assists in elbow flexion
Extensor Carpi Radialis Longus (innervation)
Radial nerve (C6-8)
Extensor Carpi Radialis Brevis (attachment)
Lateral epicondyle to base of 3rd metacarpal
Extensor Carpi Radialis Brevis (actions)
Extend & radial deviation of hand @ wrist
Extensor Carpi Radialis Brevis (innervation)
Radial nerve (C6-8)
Extensor Digitorum (attachments)
Lateral epicondyle to extensor expansion of digits 2-5
Extensor Digitorum (innervation)
Radial nerve (C6-8)
Extensor Digiti Minimi (attachment)
Lateral epicondyle to digital expansion of 5th digit
Extensor Digiti Minimi (actions)
Extend 5th digit @ MCP & IP
Extensor Digiti Minimi (innervation)
Radial nerve (C7-8)
Extensor Carpi Ulnaris (attachment)
Lateral epicondyle to base of 5th metacarpal
Extensor Carpi Ulnaris (action)
Extends & ulnar deviation @wrist
Extensor Carpi Ulnaris (innervation)
Radial nerve (C6-8)
Supinator (attachment)
Lateral epicondyle, RCL & supinator crest of ulna to lateral surface of proximal radius
Supinator (action)
Supinate forearm
Supinator (innervation)
Radial nerve (C5-6)
Extensor Indicis (attachment)
Posterior surface of ulna & interosseous membrane to digital expansion of 2nd digit
Extensor Indicis (action)
Extends 2nd digit @ MCP & IP
Extensor Indicis (innervation)
Radial nerve (C7-8)
Abductor Pollicis Longus (attachment)
Proximal posterior radius, ulna & interosseous membrane to base of 1st metacarpal & trapezium
Abductor Pollicis Longus (actions)
Abducts & extends thumb @ CMC joint and radial deviation
Abductor Pollicis Longus (innervation)
Radial nerve (C6-8)
Extensor Pollicis Brevis (attachments)
Posterior radial surface & interosseous membrane to base of 1st proximal phalanx
Extensor Pollicis Brevis (action)
Extends thumb (MCP), extends & abducts @ CMC joint
Extensor Pollicis Brevis (innervation)
Radial nerve (C6-8)q
Extensor Pollicis Longus (attachments)
Middle 1/3 of posterior surface of ulna & interosseous membrane to the base of 1st distal phalanx
Extensor Pollicis Longus (action)
Extend thumb @ CMC, MCP & IP
Extensor Pollicis Longus (innervation)
Radial nerve (C6-8)