Forearm Muscles Flashcards by Dallyce Marglon

Pronator Teres origin

Superficial flexor

Humeral head: medial supracondylar ridge

Ulnar head: coronoid process

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Pronator teres insertion

Superficial flexor

Middle of lateral surface of the radius

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Pronator teres innervation and spinal level

Superficial flexor

Median C6,7

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Pronator teres action

Superficial flexor

Pronator forearm; assist forearm flexion

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Flexor carpi radialis (FCR) origin

Superficial flexor

Medial epicodyle of humerus

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Flexor carpi radialis (FCR) insertion

Superficial flexor

Base of 2nd (& 3rd) metacarpals

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Flexor Carpi Radialis (FCR) innervation and spinal level

Superficial flexor

Median C6,7

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Flexor Carpi Radialis (FCR) action

Superficial flexor

Flexion and radial deviation of hand; assist forearm pronation

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Palmaris longus origin

Superficial flexor

Medial epicondyle of humerus

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Palmaris longus insertion

Superficial flexor

Palmar aponeurosis

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Palmaris longus innervation and spinal level

Superficial flexor

Median C 7,8

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Palmaris longus action

Superficial flexor

Flex at wrist? , weakly assist elbow flexion

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Flexor carpi ulnaris (FCU) origin

Superficial flexor

Humeral head: medial epicondyle of humerus

Ulnar head: olecranon and adjacent ulnar shaft

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Flexor carpi ulnaris (FCU) insertion

Superficial flexor

Pisiform, hook of the base of the hamate, 5th metacarpal

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Flexor carpi ulnaris (FCU) innervation and spinal level

Superficial flexor

Ulnar C7 C8 T1

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Flexor carpi ulnaris (FCU) action

Superficial flexor

Flex At wrist ; ulnar deviation of hand

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Flexor digitorum superficialis (FDS) origin

Humeral-ulnar head: medial epicondyle

Radial head: anterior, upper 1/2 or radius

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Flexor digitorum superficialis (FDS) insertion

Splits to attach to lateral aspects of base of the middle phalanx of digits 2-5

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Flexor digitorum superficialis innervation and spinal level

Median C7,8 T1

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Flexor digitorum superficialis action

Flex middle phalanges at PIP joint; assist MCP flexion and flexion at wrist, weak elbow flexor

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Flexor digitorum profundus origin

Proximal 2/3 of anteromedial shaft of ulna and interosseous membrane

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Flexor digitorum profundus insertion

Base of the distal phalanx of digits 2-5

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Flexor digitorum profundus innervation and spinal level

Radial part: median C8, T1

Ulnar part: ulnar C8, T1

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Flexor digitorum profundus action

Flex DIP of fingers 2-5; secondary flexor at PIP and MCP joints; assists flexion at the wrist

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Flexor pollicis longus origin

Middle anterior surface of radius and adjacent interosseous membrane

Flexor pollicis longus insertion

Base of distal phalanx of thumb (palmar surface)

Flexor pollicis longus innervation and spinal level

Median C7,8

Flexor Pollicis action

Flex thumb at CMC, MCP, and IP joint

Pronator quadratus origin

Distal 1/4 of the anterior surface of the ulna

Pronator quadratus insertion

Distal 1/4 of the anterior surface of the radius

Pronator quadratus innervation and spinal level

Median C7,8

Pronator quadratus action

Probate forearm, distal radioulnar stabilization

Brachioradialis origin

Lateral supracondylar ridge, intermuscular septum

Brachioradialis insertion

Lateral side of distal radius (styloid process)

Brachioradialis innervation and spinal level

Radial C5,6

Brachioradialis action

Flex elbow; assist pronation and supination (from extremes of each it will assist in return to neutral)

Extensor carpi radialis longus origin

Lateral supracondylar ridge, lateral intermuscular septum

Extensor carpi radialis longus insertion

Dorsum of base of 2nd metacarpal

Extensor carpi radialis longus innervation and spinal level

Radial C6,7

Extensor carpi radialis longus action

Extend wrist, radially deviate hand, weak supination

Extensor carpi radialis brevis origin

Lateral epicondyle of humerus

Extensor carpi radialis brevis insertion

Dorsum of base of 3rd metacarpal

Extensor carpi radialis brevis innervation and spinal level

Radial C7,8

Extensor carpi radialis brevis action

Extend wrist, assist radial deviation of hand

Extensor digitorum origin

Lateral epicondyle of humerus (via common extensor tendon)

Extensor digitorum insertion

Extensor expansion of digits 2-5 (to proximal ,middle, and distal phalanges)

Extensor digitorum innervation and spinal level

Radial C7,8

Extensor digitorum action

Extend at MCP and IP joints; assist extension at wrist

Extensor digit minimi origin

Lateral epicondyle of humerus

Extensor digitorum minimi insertion

Extensor expansion of little finger

Extensor digit minimi innervation and spinal level

Radial C7,8

Extensor digit minimi action

Extension at MCP and IP joints of little finger ; weak wrist extension, ulnar deviation and abduction of 5th digit

Extensor carpi ulnaris origin

Lateral epicondyle of humerus and midshaft of posterior ulna

Extensor carpi ulnaris insertion

Dorsum of base of 5th metacarpal

Extensor carpi ulnaris innervation and spinal level

Radial C7,8

Extensor carpi ulnaris action

Extend and ulnarly deviate hand

Supinator origin

Lateral epicondyle of humerus, lateral collateral and annular ligaments, supinate crest of ulna (on olecranon)

Supinator insertion

Lateral and anterior surface of proximal 1/3 of radius

Supinator innervation and spinal level

Radial C6,7

Supinator action

Supinate forearm

Abductor pollicis longus origin

Posterior surfaces of middle 1/3 of radius, ulna, and interosseous membrane

Abductor pollicis longus insertion

Lateral (radial) side of base of 1st metacarpal

Abductor pollicis longus innervation and spinal level

Radial C7,8

Abductor pollicis longus action

Abduct thumb; radially deviate and flex at wrist

Extensor pollicis brevis origin

Posterior surface of the distal radius, interosseous membrane

Extensor pollicis brevis insertion

Dorsum of base of proximal phalanx of thumb

Extensor pollicis brevis innervation and spinal level

Radial C7,8

Extensor pollicis brevis action

Extend proximal phalanx of 5u,b; assist extension at carpometacarpal joint, assist radial deviation at wrist

Extensor pollicis longus origin

Middle 1/3 of posterior shaft of ulna and interosseous membrane (just distal to APL)

Extensor pollicis longus insertion

Dorsum of base of distal phalanx of thumb

Extensor pollicis longus innervation and spinal level

Radial C7,8

Extensor pollicis longus action

Extend IP and MCP joints of thumb; assist radial deviation of wrist; CMC adduction; weak wrist extension

Extensor Indicus origin

Distal shaft of ulna and interosseous membrane

Extensor indicus insertion

Index finger-within tendon sheath for extensor digitorum (continuous with ED), extensor hood

Extensor indicus innervation and spinal level

Radial C7,8

Extensor indicus action

Extends all joints of index finger; assist adduction; weak wrist extension

Forearm Muscles Flashcards

(76 cards)