DR2 The Arm and Brachial Plexus
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Questions and Answers

What is the largest muscle in the anterior compartment of the arm?

  • Supraglenoid tubercle
  • Biceps Brachii (correct)
  • Coracobrachialis
  • Brachialis
  • Where does the long head of the biceps brachii muscle originate from?

  • Coracoid process
  • Shoulder joint
  • Supraglenoid tubercle (correct)
  • Intertubercular sulcus
  • What is the function of the short head of the biceps brachii muscle?

  • Flexion of both the shoulder and elbow
  • Extension of the shoulder
  • Flexion of the shoulder
  • Flexion of the elbow (correct)
  • Where does the biceps tendon insert?

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

    What structure crosses medially over the superficial flexors of the forearm?

    <p>Bicipital aponeurosis</p> Signup and view all the answers

    Where does the bicipital aponeurosis attach?

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

    What is the function of the biceps brachii muscle?

    <p>Flexion of the shoulder and elbow</p> Signup and view all the answers

    Which muscle is a powerful supinator of the radioulnar joints?

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

    Where does the coracobrachialis muscle insert?

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

    What is the action of the brachialis muscle?

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

    What are the actions of the triceps brachii muscle?

    <p>Extension of the shoulder and elbow joints</p> Signup and view all the answers

    What are the actions of the deltoid muscle?

    <p>Adducts, flexes, extends, medially and laterally rotates the shoulder joint</p> Signup and view all the answers

    What structures pass through the Quadrangular Space?

    <p>Axillary nerve and Posterior Circumflex Humeral artery</p> Signup and view all the answers

    What does the pectoralis minor muscle do?

    <p>Protract the scapula</p> Signup and view all the answers

    Which nerve can be seen passing posteriorly through a quadrangular space with the posterior circumflex humeral artery?

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

    What is the name of the area of skin supplied by the axillary nerve?

    <p>Badge area</p> Signup and view all the answers

    What is the name of the artery that is the stem artery of the upper limb?

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

    On which side of the body does the subclavian artery usually branch directly from the aorta?

    <p>Left side</p> Signup and view all the answers

    What artery does the axillary artery change its name to as it crosses the lower border of teres major?

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

    What artery accompanies the radial nerve in the spiral groove of the humerus to supply triceps and the elbow joint?

    <p>Profunda brachii artery</p> Signup and view all the answers

    What is the name of the muscle/tendon that lies lateral to the brachial artery in the cubital fossa?

    <p>Biceps Brachii</p> Signup and view all the answers

    What are the two arteries that the brachial artery divides into in the forearm?

    <p>Radial and ulnar arteries</p> Signup and view all the answers

    What is the phenomenon called where there may be two or more small veins lying either side of one artery?

    <p>Venae Comitantes</p> Signup and view all the answers

    Which muscles does the musculocutaneous nerve supply?

    <p>Biceps, coracobrachialis, and brachialis</p> Signup and view all the answers

    Which area of the forearm does the lateral cutaneous nerve of the forearm supply?

    <p>Lateral forearm</p> Signup and view all the answers

    Which muscles does the ulnar nerve supply?

    <p>Flexor muscles of the forearm and intrinsic muscles of the hand</p> Signup and view all the answers

    Which area of the hand does the ulnar nerve supply?

    <p>Palmer aspect and digits 1, 2, 3, and half of digit 4</p> Signup and view all the answers

    Which muscles does the median nerve supply?

    <p>Almost all of the muscles of the anterior compartment of the forearm and some of the intrinsic muscles of the hand</p> Signup and view all the answers

    Which area of the hand does the median nerve supply?

    <p>Palmer aspect and digits 1, 2, 3, and half of digit 4</p> Signup and view all the answers

    Which muscles does the radial nerve supply?

    <p>Muscles and skin over the whole posterior aspect of the upper limb</p> Signup and view all the answers

    Which area of the hand does the radial nerve supply?

    <p>Dorsal aspect and digits 1, 2, 3, and half of digit 4</p> Signup and view all the answers

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