Upper Limb Muscle Anatomy Quiz
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Questions and Answers

Which muscle is NOT part of the deep group of extensor compartment muscles?

  • Flexor pollicis brevis (correct)
  • Supinator
  • Extensor indicis
  • Abductor pollicis longus
  • Which of the following compartments contains muscles responsible for thumb opposition?

  • Central compartment
  • Hypothenar compartment
  • Thenar compartment (correct)
  • Adductor compartment
  • Which muscle is responsible for the abduction of the thumb?

  • Abductor pollicis longus (correct)
  • Opponens pollicis
  • Extensor pollicis brevis
  • Flexor pollicis brevis
  • Which of these is NOT a compartment of the hand?

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

    What happens to the axilla when the arm is abducted?

    <p>The axilla almost disappears.</p> Signup and view all the answers

    Which muscle is part of the anterior wall of the axilla?

    <p>Pectoralis major</p> Signup and view all the answers

    What is the primary function of the muscles in the hypothenar compartment?

    <p>Abduction of the little finger</p> Signup and view all the answers

    What structures does the axilla provide a passageway for?

    <p>Neurovascular structures</p> Signup and view all the answers

    Which of the following is NOT a component of the anterior wall of the axilla?

    <p>Serratus anterior muscle</p> Signup and view all the answers

    What forms the anterior axillary fold?

    <p>Lower margin of the pectoralis major muscle</p> Signup and view all the answers

    Which muscle is responsible for flexing the elbow joint?

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

    What is the primary action of the triceps brachii muscle?

    <p>Extends the arm</p> Signup and view all the answers

    Which nerve innervates the biceps brachii muscle?

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

    Where does the coracobrachialis muscle insert?

    <p>Medial border of the humerus</p> Signup and view all the answers

    What is the origin of the long head of the triceps brachii muscle?

    <p>Infraglenoid tubercle of the scapula</p> Signup and view all the answers

    What is the primary action of the flexor digitorum profundus?

    <p>Flexes the distal phalanges at the distal interphalangeal joints</p> Signup and view all the answers

    Which nerves innervate the medial and lateral parts of the flexor digitorum profundus?

    <p>Median nerve for lateral and ulnar nerve for medial</p> Signup and view all the answers

    What is the role of the pronator quadratus in forearm movement?

    <p>Pronates the forearm and holds ulna and radius together distally</p> Signup and view all the answers

    Which muscle is responsible for flexing the interphalangeal joint of the thumb?

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

    The muscles in the posterior compartment of the forearm are primarily responsible for which function?

    <p>Abducting the thumb and extending the wrist and digits</p> Signup and view all the answers

    Which muscles contribute to the posterior wall of the axilla?

    <p>Subscapularis, teres major, and latissimus dorsi</p> Signup and view all the answers

    What structure forms the base of the axilla?

    <p>Skin and superficial fascia</p> Signup and view all the answers

    Which nerve is associated with the medial wall of the axilla?

    <p>Long thoracic nerve</p> Signup and view all the answers

    What are the boundaries of the apex of the axilla?

    <p>Middle-third of clavicle, superior margin of scapula, and outer margin of the first rib</p> Signup and view all the answers

    What forms the floor of the anatomical snuff box?

    <p>Scaphoid and trapezium</p> Signup and view all the answers

    Which structure primarily gets compressed in carpal tunnel syndrome?

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

    What is the main function of the carpal tunnel?

    <p>To transmit tendons and the median nerve</p> Signup and view all the answers

    What happens to sensory perception in the palm during carpal tunnel syndrome?

    <p>It is not usually impaired</p> Signup and view all the answers

    Which tendons are transmitted through the carpal tunnel?

    <p>Flexor pollicis longus and flexor digitorum superficialis</p> Signup and view all the answers

    What is located in the floor of the cubital fossa?

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

    Which structure is NOT a content of the axilla?

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

    Which of the following defines the medial border of the cubital fossa?

    <p>Lateral border of pronator teres</p> Signup and view all the answers

    What forms the roof of the cubital fossa?

    <p>Deep and superficial fasciae</p> Signup and view all the answers

    Which nerve is located within the cubital fossa?

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

    What structure is transmitted through the anatomical snuff box?

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

    Where can the pulsation of the radial artery be palpated?

    <p>In the anatomical snuff box</p> Signup and view all the answers

    Which veins are located anteriorly to the cubital fossa?

    <p>Median cubital vein</p> Signup and view all the answers

    Which structure lies posteriorly to the cubital fossa?

    <p>Elbow joint</p> Signup and view all the answers

    What can happen if the brachial artery is accidentally punctured in the cubital fossa?

    <p>It may lead to excessive bleeding</p> Signup and view all the answers

    Which nerve innervates the Tricep Brachii?

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

    What is the main action of the Tricep Brachii?

    <p>Extends the elbow joint</p> Signup and view all the answers

    Which muscle originates from the medial epicondyle of the humerus and flexes the wrist?

    <p>Flexor Carpi Radialis</p> Signup and view all the answers

    Which of the following muscles is responsible for pronating the forearm at the proximal radio-ulnar joint?

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

    What separates the anterior compartment of the forearm from the extensor compartment?

    <p>Ulna and radius</p> Signup and view all the answers

    Which muscle primarily uses the ulnar nerve for its innervation?

    <p>Flexor Carpi Ulnaris</p> Signup and view all the answers

    Which muscle of the superficial flexors of the forearm can also flex the metacarpophalangeal joints?

    <p>Flexor Digitorum Superficialis</p> Signup and view all the answers

    What is the common origin site for the superficial flexors of the forearm?

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

    Study Notes

    Deep Group of Extensor Compartment Muscles

    • Supinator
    • Abductor pollicis longus
    • Extensor pollicis longus
    • Extensor pollicis brevis
    • Extensor indicis

    Compartments of the Hand

    • Thenar compartment
    • Adductor compartment
    • Hypothenar compartment
    • Central compartment

    Thenar Compartment

    • It has muscles that make up the thenar eminence
    • These muscles include:
      • Flexor pollicis brevis
      • Abductor pollicis brevis
      • Opponens pollicis

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    Description

    Test your knowledge on the anatomy of upper limb muscles with this quiz. Questions cover the extensor compartment, axilla, and specific muscle functions. Perfect for students studying anatomy or preparing for exams.

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