Muscles of the Hand!!

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action of lumbricals (2)

- Flex at MCP of digits 2-5 - extend at IP joints at digits 2-5

origin of adductor pollicis (3)

- capitate - 2nd and 3rd metacarpals

actions of extensor carpi radialis brevis and longus (3)

- extends wrist - abducts wrist - radially deviates wrist

actions of extensor digitorum (2)

- extension of wrist - extension/abduction of digits 2-5

action of extensor digiti minimi (2)

- extension of wrist and all joints - extension of 5th digit (pinky)

actions of flexor digitorum profundus

- flexes wrist - flexes distal phalanx of digits 2-5

action of palmaris longus (2)

- flexes wrist - tenses palmar fascia

Origin of Abductor Pollicis Brevis (3)

- flexor retinaculum - scaphoid - trapezium

origin of pronator teres (2)

- medial epicondyle of humerus - coronoid process of ulna

insertion of flexor carpi ulnaris (3)

- pisiform - hook of hamate - base of 5th metacarpal

origin of opponens pollicis (3)

- scaphoid - trapezium - flexor retinaculum

Origin of Flexor Pollicis Brevis

- trapezium - capitate - trapezoid

what is radial deviation?

Abduction of the wrist in the frontal plane

insertion of flexor digitorum profundus

Base of distal phalanx of digits 2-5

action of extensor pollicis brevis

Extends thumb at carpometacarpal joint and metacarpophalangeal joint

action of opponens pollicis

Opposition of thumb at CMC joint

insertion of extensor indicis

Posterior digital expansion of 2nd digit (index finger)

origin of extensor pollicis longus (2)

Posterior surface of middle third of ulna and interosseous membrane

origin of extensor pollicis brevis

Posterior surface of radius and interosseous membrane

origin of extensor indicis (2)

Posterior surface of ulna and interosseous membrane

innervation of palmar interossei

Ulnar nerve

action of dorsal interossei

abduction of digits 2-4 at MCP joint

action of abductor digiti minimi

abducts 5th digit with MCP joint

action of abductor pollicis longus

abducts and extends thumb at carpometacarpal joint

action of abductor pollicis brevis

abducts thumb at CMC joint and MCP joint

action of palmar interossei

adduct digits 2, 4, and 5 at MCP joint

action of adductor pollicis

adducts and flexes thumb at CMC and MCP joints

origin of flexor pollicis longus (2)

anterior surface of radius and interosseous membrane

insertion of abductor pollicis longus

base of 1st metacarpal

insertion of flexor carpi radialis

base of 2nd and 3rd metacarpals

insertion of extensor carpi radialis longus

base of 2nd metacarpal

insertion of extensor carpi radialis brevis

base of 3rd metacarpal

insertion of extensor pollicis longus

base of distal phalanx of thumb

insertion of flexor pollicis longus

base of distal phalanx of thumb

insertion of extensor carpi ulnaris

base of fifth metacarpal

Insertion of Abductor Pollicis Brevis

base of proximal phalanx of digit 1 (thumb)

insertion of flexor digit minimi brevis

base of proximal phalanx of digit 5

insertion of extensor pollicis brevis

base of proximal phalanx of thumb

action of extensor carpi ulnaris (2)

extends and adducts wrist (ulnar deviation)

action of extensor pollicis longus

extends thumb at the MCP, ICP, and CMC joint of the thumb

action of extensor indicis

extension of the joint of index finger

insertion of extensor digiti minimi

extensor expansion of the fifth digit

action of flexor pollicis brevis

flexes MCP and CMC of thumb

action of flexor carpi ulnaris

flexes and adducts hand at wrist

action of flexor digitorum superficialis

flexes digits 2-5 and flexes wrist

action of flexor pollicis longus

flexes distal phalanx of thumb, wrist, and all 3 joints

action of flexor carpi radialis (2)

flexion and abduction of wrist (radial deviation)

action of flexor digit minimi brevis

flexion at MCP for digit 5

origin of flexor digit minimi brevis (2)

flexor retinaculum and hook of hamate

origin of opponens digiti minimi (2)

flexor retinaculum and hook of hamate

insertion of palmaris longus (2)

flexor retinaculum and palmar aponeurosis (fascia)

innervation of lumbricals

lateral 2: median nerve medial 2: ulnar nerve

insertion of opponens pollicis

lateral border of 1st metacarpal

Origin of extensor carpi radialis longus and brevis

lateral epicondyle of humerus

origin of extensor digiti minimi

lateral epicondyle of humerus

origin of extensor digitorum

lateral epicondyle of humerus

origin of supinator

lateral epicondyle of humerus

origin of extensor carpi ulnaris (2)

lateral epicondyle of humerus and posterior border of ulna

insertion of abductor digiti minimi

lateral side of base of proximal phalanx of 5th digit

insertion of pronator teres

lateral surface of radius

insertion of supinator

lateral surface of radius

insertion of opponens digiti minimi

medial border of 5th metacarpal

origin of flexor carpi radialis

medial epicondyle of humerus

origin of flexor carpi ulnaris

medial epicondyle of humerus

origin of palmaris longus

medial epicondyle of humerus

origin of flexor digitorm superficialis

medial epicondyle of humerus and radius

insertion of adductor pollicis

medial side of base of proximal phalanx of thumb

innervation of flexor pollicis brevis

median and ulnar nerve

innervation of flexor digitorum profundus

median and ulnar nerves

innervation of abductor pollicis brevis

median nerve

innervation of flexor carpi radialis

median nerve

innervation of flexor digitorum superficialis

median nerve

innervation of flexor pollicis longus

median nerve

innervation of opponens pollicis

median nerve

innervation of palmaris longus

median nerve

innervation of pronator teres

median nerve

insertion of extensor digitorum

middle and distal phalanges of fingers 2-5

insertion of flexor digitorum superficialis

middle phalanges of digits 2-5

action of opponens digiti minimi

opposition/flexion of digit 5 at CMC joint

origin of abductor digiti minimi

pisiform

action of pronator teres

pronates forearm

Innervation of extensor digiti minimi

radial nerve

innervation of abductor pollicis longus

radial nerve

innervation of extensor carpi radialis longus and brevis

radial nerve

innervation of extensor carpi ulnaris

radial nerve

innervation of extensor digitorum

radial nerve

innervation of extensor indicis

radial nerve

innervation of extensor pollicis longus and brevis

radial nerve

innervation of supinator

radial nerve

insertion of flexor pollicis brevis

radial side of base of proximal phalanx of thumb

insertion of lumbricals

radial side of extensor expansion of extensor digitorum

origin of abductor pollicis longus

radius and ulna

action of supinator

supinates forearm

origin of lumbricals

tendons of flexor digitorum profundus

origin of flexor digitorum profundus

ulna and interosseous membrane

Innervation of adductor pollicis

ulnar nerve

innervation of abductor digiti minimi

ulnar nerve

innervation of dorsal interossei

ulnar nerve

innervation of flexor carpi ulnaris

ulnar nerve

innervation of flexor digit minimi brevis

ulnar nerve

innervation of opponens digiti minimi

ulnar nerve


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