Extensor Carpi Radialis Longus

A: extend wrist, radial deviation, assist to flex elbow

O: lateral supracondylar ridge

I: base of 2nd metacarpal

N: Radial

Extensor Carpi Ulnaris

A: extend wrist, ulnar deviation

O: common extensor tendon from lateral epicondyle

I: base of 5th metacarpal

N: radial

Extensor Carpi Radialis Brevis

A: extend wrist, radial deciation; assist to flex elbow

O: lateral supracondylar ridge

I: base of 3rd metacarpal

N: radial

Adductor Pollicis

A: adduct thumb (CMC and MCP joints); assist in thumb flexion (MCP joint)

N: ulnar

Extensor Digitorum

A: Extend the MCP, PIP, and DIP joints of the fingers 2-5; assist to extend wrist

O: common flexor tendon from the lateral epicondyle

I: middle and distal phalanges of fingers 2-5

N: radial

Extensor Indicis

A: extend 2nd finger; assist to adduct 2nd finger

O: posterior surface of distal ulna; interosseous membrane

I: tendon of extensor digitorum at 2nd metacarpal

N: radial

Opponens Pollicis

A: opposition of thumb

N: median

Extensor Pollicis Longus

A: extend thumb

N: radial

Abductor Pollicis Brevis

A: abuction of thumb (CMC and MCP joints); assist in thumb opposition

N: median

Flexor Pollicis Brevis

A: flex thumb (CMC & MCP joints); assist in thumb oppositon

N: median for superficial; ulnar for deep head

Abductor Pollicis Longus

A: abduct & extend thumb (CMC joint)

N: Radial

Extensor Pollicis Longus

A: Extend thumb

N: Radial

Extensor Pollicis Brevis

A: Extend the thumb

N: Radial

Flexor Pollicis Longus

A: flex thumb

N: Median

Abductor Pollicis Longus

A: abduct and extend thumb (CMC joint)

N: radial

Lumbricals

A: extend PIP and DIP of fingers 2 - 5, flex MCP of fingers 2 - 5

N: median (fingers 2 & 3), ulnar (fingers 4 & 5)

Palmar Interossei

A: adduct fingers; assist in finger flexion (MCP joint), assist in finger extension (PIP & DIP joints via extensor aponeurosis)

N: ulnar

Dorsal Interossei

A: abduct fingers; assist in finger flexion (MCP joints), assist in finger extenstion (PIP & DIP joint via extensor aponeurosis)

N: ulnar

Flexor Carpi Radialis

A: flex the wrist, radial deviation, flex elbow

O: common flexor tendon from medial epicondyle

I: base of 2nd and 3rd metacarpal

N: median

Palmaris Longus

A: flex wrist, flex elbow

O: common flexor tendon from medial epicondyle

I: palmar aponeurosis and flexor retinaculum

N: median

Flexor Carpi Ulnaris

A: flex wrist, ulnar deviate, assist to flex elbow

O: common flexor tendon from medial epicondyle, posterior surface of proximal half of ulna

I: pisiform

N: ulnar

Flexor Digitorum Superficialis

A: Flex the MCP and PIP joints of fingers 2 - 5

O: common flexor tendon from medial epicondyle, medial collateral ligament, coronoid process, and shaft of radius

I: sides of middle phalanx of fingers 2 - 5

N: median

Flexor Digitorum Profundus

A: flex the MCP and DIP joints of fingers 2 - 5

O: anterior and medial surfaces of proximal 3/4 of ulna

I: palmar surface of bases of distal phalanges of fingers 2 - 5

N: median (fingers 2 & 3), ulnar (fingers 4 & 5)

Abductor Digiti Minimi

A: abduct the fifth finger (MCP joint); assist in fifth finger opposition

N: ulnar

Flexor Digiti Minimi Brevis

A: Flex the fifth finger (MCP); assist in opposition

N: ulnar

Opponens Digiti Minimi

A: opposition of fifth finger

N: ulnar

Extensor Digiti Minimi

A: extend fifth finger

N: radial