Intro to the Upper Limb
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Questions and Answers

What nerves innervate the skin of the hand according to the text?

  • T2-T4
  • C6-C8 (correct)
  • T1-T3
  • C5-C7
  • Which nerve predominantly controls abduction and adduction of the index, middle, and ring fingers?

  • C6
  • T1 (correct)
  • C5
  • C7
  • Which nerve is responsible for innervating the medial one and one-half digits?

  • Radial nerve
  • Median nerve
  • Musculocutaneous nerve
  • Ulnar nerve (correct)
  • Which nerve is associated with the anterior compartment of the forearm?

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

    Which dermatome is responsible for innervating the palmar surface of the lateral three and one-half digits?

    <p>C6 (B)</p> Signup and view all the answers

    Innervation of the intrinsic muscles of the hand is primarily by which spinal nerves?

    <p>C8, T1 (B)</p> Signup and view all the answers

    What is the primary blood supply of the posterior compartment of the forearm?

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

    Which artery supplies the superficial palmar arterial arch and branches of the hand?

    <p>Ulnar artery (D)</p> Signup and view all the answers

    Which test mainly checks for spinal cord level C7 by tapping on a specific tendon?

    <p>Tapping on triceps tendon posterior to the elbow (B)</p> Signup and view all the answers

    Which nerve is responsible for digit adduction and abduction in the hand?

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

    What divides the limb into compartments in the forearm?

    <p>Interosseous membrane (B)</p> Signup and view all the answers

    Which of the following is NOT a part of the structural relationships within the context of sectional anatomy for the upper limb?

    <p>Innervation of the upper extremity (C)</p> Signup and view all the answers

    What is the primary function of the superficial and deep fascia of the upper extremity in terms of myofascial compartments?

    <p>To contain and separate the muscles and neurovascular structures (A)</p> Signup and view all the answers

    Which of the following is a key difference between hand and foot plates in upper and lower limb development?

    <p>Foot plates have more digital rays than hand plates (B)</p> Signup and view all the answers

    What is the primary importance of myotome and dermatome formation in limb development?

    <p>To facilitate the development of the nerve distribution (D)</p> Signup and view all the answers

    Which of the following is a key function of the deep lymphatic drainage in the upper extremity?

    <p>To remove waste products from the tissues (A)</p> Signup and view all the answers

    Which of the following is NOT a key aspect of the development of the nerve distribution to the limbs?

    <p>The rotation of the limb axes (D)</p> Signup and view all the answers

    Which nerve is responsible for the cutaneous innervation of the upper limb?

    <p>All of the above (D)</p> Signup and view all the answers

    What type of joint is the acromioclavicular joint?

    <p>Synovial plane joint (C)</p> Signup and view all the answers

    What is the primary function of the glenoid labrum in the glenohumeral joint?

    <p>All of the above (D)</p> Signup and view all the answers

    Which ligament is responsible for connecting the coracoid process to the clavicle?

    <p>Coracoclavicular ligament (A)</p> Signup and view all the answers

    What is the only articulation between the upper limb and the axial skeleton?

    <p>Sternoclavicular joint (C)</p> Signup and view all the answers

    What is the primary function of the tendons of the rotator cuff muscles in the glenohumeral joint?

    <p>To reinforce the joint capsule posteriorly, superiorly, and anteriorly (B)</p> Signup and view all the answers

    Which of the following statements about limb development is correct?

    <p>The upper limb buds appear a few days before the lower limb buds. (D)</p> Signup and view all the answers

    What is the composition of the limb bud?

    <p>Mesenchyme derived from somatic mesoderm and covered by ectoderm. (B)</p> Signup and view all the answers

    What is the function of the apical ectodermal ridge?

    <p>It exerts an inductive influence on the underlying mesenchyme, causing it to grow and differentiate. (D)</p> Signup and view all the answers

    What happens to the tissue forming the webbing between the digits?

    <p>It breaks down to form separate digits. (C)</p> Signup and view all the answers

    Which border of the limb bud gives rise to the thumb?

    <p>The cranial or preaxial border. (C)</p> Signup and view all the answers

    What is the appearance of the distal end of the limb after the tissue between the digits breaks down?

    <p>It resembles a hand-like or foot-like structure. (D)</p> Signup and view all the answers

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