Hand Anatomy and Function
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Questions and Answers

Where is the carpal tunnel located?

  • On the dorsal side of the wrist
  • In the forearm
  • In the hand
  • On the palmar side of the wrist (correct)

    • What structures pass through the carpal tunnel?

  • Ulnar nerve and extensor muscles
  • Median nerve and flexor muscles (correct)
  • Radial nerve and abductor muscles
  • Median nerve and extensor muscles

    • Where do the intrinsic muscles of the hand originate from?

  • Bones of the arm
  • Bones of the hand (correct)
  • Bones of the shoulder
  • Bones of the wrist

    • What causes carpal tunnel syndrome?

    <p>Entrapment of the median nerve</p> Signup and view all the answers

    What is responsible for drainage and innervation in the hand?

    <p>Nerves</p> Signup and view all the answers

    What is the floor of the carpal tunnel composed of?

    <p>Carpal bones</p> Signup and view all the answers

    Which nerve passes through the carpal tunnel and can cause numbness and weakness in the hand?

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

    Which muscle is responsible for abducting the thumb?

    <p>Abductor pollicis brevis</p> Signup and view all the answers

    Which muscle flexes the thumb?

    <p>Flexor pollicis brevis</p> Signup and view all the answers

    What is the main function of the thenar muscles?

    <p>Thumb movements</p> Signup and view all the answers

    Which nerve innervates the abductor pollicis brevis muscle?

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

    What is the action of the opponens pollicis muscle?

    <p>Draws 1st metacarpal laterally to oppose thumb toward center of palm</p> Signup and view all the answers

    Which nerve innervates the flexor pollicis brevis muscle?

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

    What is the origin of the adductor pollicis muscle?

    <p>Oblique head – bases of 2nd and 3rd metacarpals, Transverse head – anterior surface of body of 3rd metacarpal bone.</p> Signup and view all the answers

    What is the primary action of the adductor pollicis muscle?

    <p>Adducts thumb towards middle digit</p> Signup and view all the answers

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