Anatomy of the Forearm and Hand
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Questions and Answers

Which muscle originates from the upper 2/3 of the lateral supracondylar ridge of the humerus?

  • Brachioradialis (correct)
  • Extensor carpi radialis longus
  • Abductor pollicis longus
  • Supinator

    • What is the action of the brachioradialis muscle?

  • Extension of the wrist
  • Abduction of the thumb
  • Flexion of the elbow at midprone position (correct)
  • Rotation of the forearm

    • Which muscle is responsible for extending the thumb?

  • Abductor pollicis longus
  • Supinator
  • Extensor pollicis brevis (correct)
  • Extensor indicis

    • Which muscle originates from the front of the lateral epicondyle?

    <p>Common extensor origin</p> Signup and view all the answers

    What is the nerve supply of the extensor carpi radialis longus muscle?

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

    Which muscle is responsible for extending the index finger?

    <p>Extensor indicis</p> Signup and view all the answers

    What is the insertion point of the brachioradialis muscle?

    <p>Base of styloid process of radius</p> Signup and view all the answers

    Which muscle is responsible for abduction of the thumb?

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

    What is the action of the extensor pollicis longus muscle?

    <p>Extension of the thumb</p> Signup and view all the answers

    Which muscle is located in the deep layer of the forearm?

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

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