Muscles of The Forearm Flashcards
Extensor carpi radialis longus OIA
O: Lateral supracondylar ridge of humerus
I: Base of MC 2
A: Extend and abduct the hand
Extensor Digitorum OIA
O: Lateral epicondyle CEO
I: Extensor expansions of medial 4 digits
A: extends medial digits at MCP, PIP and DIP
Extensor Digiti Minimi OIA
O: Lateral epicondyle CEO
I: extensor expansion of 5 digit
A: Extends 5th digit at MCP, PIP, and DIP?
Extensor Carpi Ulnaris OIA
O: Lateral epicondyle CEO
I: Base of MC 5
A: Extend and adduct hand
Abductor Pollicis Longus OIA
O: Posterior surface of the proximal halves of ulna and radius. Interosseous membrane.
I: Base of MC 1
A: Abduct Thumb. extends at CMP joint
Extensor Pollicis Brevis OIA
O: Posterior surface of the distal 1//3 of radius. Interosseous membrane.
I: Dorsal aspect of base of proximal phalanx of thumb
A: Extends proximal phalanx at MCP and CMP
Extensor Pollicis Longus OIA
O: Posterior surface of the middle of Ulna. Interosseous membrane.
I: Dorsal aspect of the base of distal Phalanx 1.
A: extends at IP, MCP, and CMP joints of thumb.
Extensor Indicis OIA
O: O: Posterior surface of the distal 1//3 of ulna. Interosseous membrane.
I: Extensor expansion of 2nd digit
A: Extends 2nd digit. helps extend wrist.
Supinator OIA
O: Lateral epicondyle of humerus; radial collateral and annular ligaments.
I: Proximal 1/3 of radius
A: Supination
Brachioradialis Innervation
Radial Nerve, C6 primary
Extensor carpi radialis longus Innervation
Radial Nerve, C6 primary
Extensor carpi radialis brevis Innervation
Deep Branch of the radial nerve, C7 primary
Extensor Digitorum Innervation
Deep Branch of the radial nerve, C7 primary
Extensor Digiti Minimi Innervation
Deep Branch of the radial nerve, C7 primary
Extensor Carpi Ulnaris Innervation
Deep Branch of the radial nerve, C7 primary