Anatomy of Forearm Muscles

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Questions and Answers

What is the origin of the Pronator Teres muscle?

  • Common flexor tendon from medial epicondyle of humerus and conoroid process of the ulna (correct)
  • Lateral surface of the radius
  • Medial epicondyle of humerus
  • Base of second and third metacarpals

What is the nerve responsible for the Flexor carpi Radialis muscle?

  • Median C6,7,8 (correct)
  • Ulnar C7,8,T1
  • Radial C6,7,8
  • Median C6,7

What is the action of the Palmaris Longus muscle?

  • Pronate the forearm
  • Tense the palmar fascia (correct)
  • Flex the wrist
  • Abduct the wrist

What is the insertion of the Flexor carpi ulnaris muscle?

<p>Pisiform, hook of the hamate, and base of fifth metacarpal (A)</p> Signup and view all the answers

Which muscle is responsible for flexing and adducting the wrist?

<p>Flexor capri ulnaris (D)</p> Signup and view all the answers

Which nerve is responsible for the Flexor carpi ulnaris muscle?

<p>Ulnar C7,8,T1 (B)</p> Signup and view all the answers

What is the common origin of the Pronator Teres, Flexor carpi Radialis, and Palmaris Longus muscles?

<p>Medial epicondyle of humerus (A)</p> Signup and view all the answers

Which muscle has the most extensive origin?

<p>Flexor Digitorum superficialis (C)</p> Signup and view all the answers

What is the common nerve responsible for the Flexor carpi Radialis and Palmaris Longus muscles?

<p>Median nerve (A)</p> Signup and view all the answers

Which muscle is responsible for pronating the forearm?

<p>Pronator Teres (D)</p> Signup and view all the answers

What is the insertion of the Flexor Digitorum superficialis muscle?

<p>Sides of middle phalanges of second through fifth fingers (D)</p> Signup and view all the answers

Which nerve is responsible for the Flexor Digitorum superficialis muscle?

<p>Median C7,8,T1 (D)</p> Signup and view all the answers

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Study Notes

Muscles of the Forearm

  • Pronator Teres:
  • Origin: Common flexor tendon from medial epicondyle of humerus and conoroid process of the ulna
  • Insertion: Middle surface of lateral surface of the radius
  • Action: Pronate the forearm
  • Nerve: Median C6,7

Wrist and Finger Flexors

  • Flexor Carpi Radialis:

  • Origin: Common flexor tendon from medial epicondyle of humerus

  • Insertion: Bases of second and third metacarpals

  • Action: Flex the wrist or abduct the wrist

  • Nerve: Median C6,7,8

  • Palmaris Longus:

  • Origin: Common flexor tendon of epiocondyle of humerus

  • Insertion: Flexor retinaculum and palmar aponeurosis

  • Action: Tense the palmar fascia

  • Nerve: Median C6,7,8,T1

  • Flexor Carpi Ulnaris:

  • Origin: Humeral head - Common flexor tendon from medial epicondyle of humerus, Ulnar head - Posterior surface of proximal two thirds of ulna

  • Insertion: Pisiform, hook of the hamate, and base of fifth metacarpal

  • Action: Flex the wrist and Adduct the wrist

  • Nerve: Ulnar C7,8,T1

  • Flexor Digitorum Superficialis:

  • Origin: Common flexor tendon from medial epicondyle of humerus, ulnar collateral ligament, coronoid process of ulna, interosseous membrane, and proximal shaft of radius

  • Insertion: Sides of middle phalanges of second shaft of radius

  • Action: Flex second through 5th fingers

  • Nerve: Median C7,8,T1

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