Untitled Flashcards Set

Extensor Forearm Muscles Flashcards

Brachioradialis

• What is the origin of Brachioradialis?
  Lateral supracondylar crest of humerus

• What is the insertion of Brachioradialis?
  Styloid process of radius

• What is the action of Brachioradialis?
  Flexes forearm

• What is the innervation of Brachioradialis?
  Radial nerve

Extensor carpi radialis longus

• What is the origin of Extensor carpi radialis longus?
  Lateral supracondylar crest of humerus

• What is the insertion of Extensor carpi radialis longus?
  Base of metacarpal 2

• What is the action of Extensor carpi radialis longus?
  Extends hand & abducts hand

• What is the innervation of Extensor carpi radialis longus?
  Radial nerve

Extensor carpi radialis brevis

• What is the origin of Extensor carpi radialis brevis?
  Lateral epicondyle of humerus

• What is the insertion of Extensor carpi radialis brevis?
  Base of metacarpal 3

• What is the action of Extensor carpi radialis brevis?
  Extends hand & abducts hand

• What is the innervation of Extensor carpi radialis brevis?
  Radial nerve

Extensor digitorum

• What is the origin of Extensor digitorum?
  Lateral epicondyle of humerus

• What is the insertion of Extensor digitorum?
  Distal phalanges of digits 2–5

• What is the action of Extensor digitorum?
  Extends hand & digits 2–5

• What is the innervation of Extensor digitorum?
  Radial nerve

Extensor digiti minimi

• What is the origin of Extensor digiti minimi?
  Lateral epicondyle of humerus

• What is the insertion of Extensor digiti minimi?
  Distal phalanx of digit 5

• What is the action of Extensor digiti minimi?
  Extends hand & digit 5

• What is the innervation of Extensor digiti minimi?
  Radial nerve

Extensor carpi ulnaris

• What is the origin of Extensor carpi ulnaris?
  Lateral epicondyle of humerus & posterior ulna

• What is the insertion of Extensor carpi ulnaris?
  Base of metacarpal 5

• What is the action of Extensor carpi ulnaris?
  Extends hand & adducts hand

• What is the innervation of Extensor carpi ulnaris?
  Radial nerve

Supinator

• What is the origin of Supinator?
  Lateral epicondyle of humerus & olecranon

• What is the insertion of Supinator?
  Proximal radius

• What is the action of Supinator?
  Supinates forearm

• What is the innervation of Supinator?
  Radial nerve

Abductor pollicis longus

• What is the origin of Abductor pollicis longus?
  Posterior radius, ulna & interosseous membrane

• What is the insertion of Abductor pollicis longus?
  Base of metacarpal 1

• What is the action of Abductor pollicis longus?
  Abducts thumb & hand

• What is the innervation of Abductor pollicis longus?
  Radial nerve

Extensor pollicis brevis

• What is the origin of Extensor pollicis brevis?
  Posterior radius & interosseous membrane

• What is the insertion of Extensor pollicis brevis?
  Proximal phalanx of thumb

• What is the action of Extensor pollicis brevis?
  Extends proximal phalanx of thumb

• What is the innervation of Extensor pollicis brevis?
  Radial nerve

Extensor pollicis longus

• What is the origin of Extensor pollicis longus?
  Posterior ulna & interosseous membrane

• What is the insertion of Extensor pollicis longus?
  Distal phalanx of thumb

• What is the action of Extensor pollicis longus?
  Extends distal phalanx of thumb

• What is the innervation of Extensor pollicis longus?
  Radial nerve

Extensor indicis

• What is the origin of Extensor indicis?
  Posterior ulna & interosseous membrane

• What is the insertion of Extensor indicis?
  Posterior surface of index finger

• What is the action of Extensor indicis?
  Extends index finger & hand

• What is the innervation of Extensor indicis?
  Radial nerve

Flexor Forearm Muscles Flashcards

Pronator teres

• Origin: Medial epicondyle of humerus

• Insertion: Lateral radius

• Action: Pronates forearm

• Innervation: Median nerve

Flexor carpi radialis

• Origin: Medial epicondyle of humerus

• Insertion: Base of metacarpals 2 & 3

• Action: Flexes & abducts hand

• Innervation: Median nerve

Palmaris longus

• Origin: Medial epicondyle of humerus

• Insertion: Palmar aponeurosis

• Action: Flexes hand

• Innervation: Median nerve

Flexor carpi ulnaris

• Origin: Medial epicondyle of humerus

• Insertion: Base of metacarpal 5, hamate & pisiform

• Action: Flexes & adducts hand

• Innervation: Ulnar nerve

Flexor digitorum superficialis

• Origin: Medial epicondyle, coronoid process, anterior radius

• Insertion: Middle phalanges of digits 2–5

• Action: Flexes hand & digits 2–5

• Innervation: Median nerve

Flexor digitorum profundus

• Origin: Anterior ulna & interosseous membrane

• Insertion: Distal phalanges of digits 2–5

• Action: Flexes hand & digits 2–5

• Innervation: Median & Ulnar nerves

Flexor pollicis longus

• Origin: Anterior radius & interosseous membrane

• Insertion: Distal phalanx of thumb

• Action: Flexes hand & thumb

• Innervation: Median nerve

Pronator quadratus

• Origin: Anterior surface of distal ulna

• Insertion: Anterior surface of distal radius

• Action: Pronates forearm

• Innervation: Median nerve

Commonality Flashcards

• What nerve innervates all superficial extensor forearm muscles?
  Radial nerve

• Where do most superficial extensor forearm muscles originate?
  Lateral epicondyle of the humerus

• What action is common to the extensor forearm muscles?
  Extension of the wrist and fingers

• What nerve innervates most flexor forearm muscles?
  Median nerve

• Where do most flexor forearm muscles originate?
  Medial epicondyle of the humerus

• What action is shared by the flexor forearm muscles?
  Flexion of the wrist and fingers

• What are the two pronator muscles of the forearm?
  Pronator teres and Pronator quadratus

• Which flexor muscle is innervated by the ulnar nerve?
  Flexor carpi ulnaris

• Which muscle group is responsible for thumb movements?
  Deep extensor muscles (abductor pollicis longus, extensor pollicis brevis, extensor pollicis longus)