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

Flashcards

Origin of Pronator Teres?

Common flexor tendon from medial epicondyle of humerus and coronoid process of the ulna.

Nerve for Flexor Carpi Radialis?

Median nerve (C6,7,8).

Action of Palmaris Longus?

Tenses the palmar fascia.

Insertion of Flexor Carpi Ulnaris?

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

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Action of Flexor Carpi Ulnaris?

Flexes and adducts the wrist

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Nerve for Flexor Carpi Ulnaris?

Ulnar nerve (C7,8,T1).

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Common origin of some forearm flexors?

Medial epicondyle of the humerus.

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Muscle with most extensive origin?

Flexor Digitorum Superficialis.

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Common nerve for Flexor Carpi Radialis and Palmaris Longus?

Median nerve

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Action of Pronator Teres?

Pronates the forearm.

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Insertion of Flexor Digitorum Superficialis?

Sides of middle phalanges of 2nd-5th fingers.

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Nerve for Flexor Digitorum Superficialis?

Median nerve (C7,8,T1).

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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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