Week 5 Muscle Quiz Flashcards
Flexor Carpi Ulnaris
O. Medial epicondyle of humerus
I. Pisiform and base of fifth metacarpal
A. Wrist flexion, ulnar deviation
N. Ulnar nerve (C8, T1)
Flexor Carpi Radialis
O. Medial epicondyle of the humerus
I. Base of second and third metacarpals
A. Wrist flexion, radial deviation
N. Median nerve (C6, C7)
Extensor Carpi Radialis Longus
O. Supracondylar ridge of humerus
I. Base of second metacarpal
A. Wrist extension, radial deviation
N. Radial nerve (C6, C7)
Extensor Carpi Radialis Brevis
O. Lateral epicondyle of humerus
I. Base of third metacarpal
A. Wrist extension
N. Radial nerve (C6, C7)
Flexor Digitorum Superficialis
O. Common flexor tendon on the medial epicondyle, coronoid process, and radius
I. Sides of the middle phalanx of the four fingers
A. Flexes the MCP and PIP joints of the fingers
N. Median nerve (C7, C8, T1)
Flexor Digitorum Profundus
O. Upper three-fourths of the ulna
I. Distal phalanx of the four fingers
A. Flexes all three joints of the fingers (MCP, PIP, and DIP)
N. Median and ulnar nerves (C8, T1)
Flexor Pollicis Longus
O. Radius, anterior surface
I. Distal phalanx of thumb
A. Flexes all three joints of the thumb (CMC, MCP, IP)
N. Median nerve (C8, T1)
Extensor Carpi Ulnaris
O. Lateral epicondyle of humerus
I. Base of fifth metacarpal
A. Wrist extension, ulnar deviation
N. Radial nerve (C6, C7, C8)
Extensor Pollicis Brevis
O. Posterior distal radius
I. Base of the proximal phalanx of thumb
A. Extends CMC and MCP joints of thumb
N. Radial nerve (C6, C7)
Extensor Pollicis Longus
O. Middle posterior ulna and interosseous membrane
I. Base of distal phalanx of thumb
A. Extends all three joints of the thumb (CMC, MCP, and IP)
N. Radial nerve (C6, C7, C8)
Extensor Digitorum
O. Lateral epicondyle of the humerus
I. Base of distal phalanx of the second through fifth fingers
A. Extends all three joints of the fingers (MCP, PIP, and DIP)
N. Radial nerve (C6, C7, C8)
Abductor Pollicis Longus
O. Posterior radius, interosseous membrane, middle ulna
I. Base of the first metacarpal
A. Abducts thumb (CMC)
N. Radial nerve (C6, C7)
Opponens Pollicis
O. Trapezium and flexor retinaculum
I. First metacarpal
A. Opposes the thumb (CMC joint)
N. Median nerve (C6, C7)
Lumbricales
O. Tendon of the flexor digitorum profundus muscle
I. Tendon of the extensor digitorum muscle
A. Flex the MCP joint while extending the PIP and DIP joints
N. First and second lumbricales: medial nerve Third and fourth lumbricales: ulnar nerve (C6, C7, C8)
