MSK lec 9 and 10 (sync/async)
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Questions and Answers

Which spinal nerve root is responsible for innervating the deltoid muscle?

  • C6
  • C8
  • C7
  • C5 (correct)

    • What is the dermatome associated with the C6 nerve root?

  • Anterior skin of the thumb (correct)
  • Anterior skin of digits 2 and 3
  • Anterior skin of the arm
  • Skin of digits 4 and 5

    • Which muscle is innervated by the C7 nerve root?

  • Triceps (correct)
  • Finger flexors
  • Biceps
  • Deltoid

    • What is the myotome associated with the C8 nerve root?

    <p>Finger flexors</p> Signup and view all the answers

    Which of the following is the correct dermatome for the T1 nerve root?

    <p>Antero/medial elbow</p> Signup and view all the answers

    What is the muscle function of the C5 nerve root?

    <p>Arm abduction</p> Signup and view all the answers

    Which nerve root is responsible for finger abduction?

    <p>T1</p> Signup and view all the answers

    What is the dermatome associated with the C7 nerve root?

    <p>Anterior skin of digits 2 and 3</p> Signup and view all the answers

    Which muscle is innervated by the C6 nerve root?

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

    What is the clinical test for the C8 dermatome?

    <p>Sensation of skin of digits 4 and 5</p> Signup and view all the answers

    Which of the following is NOT a wall of the axillary space?

    <p>Lateral wall formed by the lower part of the humerus</p> Signup and view all the answers

    Which of the following structures passes through the axillary space?

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

    What is the purpose of the axillary space?

    <p>To provide a transition region between the root of the neck and the upper limb</p> Signup and view all the answers

    Which of the following veins are part of the venous system of the upper limb?

    <p>Both superficial and deep veins</p> Signup and view all the answers

    What is the purpose of the venous system in the upper limb?

    <p>To drain deoxygenated blood from the hand, forearm, and arm</p> Signup and view all the answers

    Which of the following is NOT a content of the axillary space?

    <p>Infraclavicular part of the brachial plexus</p> Signup and view all the answers

    What is the shape of the axillary space?

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

    Which of the following is NOT a wall of the axillary space?

    <p>Medial wall formed by the lower 4 ribs and serratus anterior muscle</p> Signup and view all the answers

    What is the primary function of the axillary space?

    <p>To serve as a transition region between the root of the neck and the upper limb</p> Signup and view all the answers

    Which of the following is NOT a content of the axillary space?

    <p>Thoracic duct</p> Signup and view all the answers

    What is the primary function of lateral rotation of the shoulder joint?

    <p>To allow the arm to extend behind the body</p> Signup and view all the answers

    Which of the following muscles is not involved in horizontal adduction of the shoulder joint?

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

    In what position should the elbow be placed to measure the range of rotation of the shoulder joint?

    <p>Bent at 90 degrees with forearm in the sagittal plane</p> Signup and view all the answers

    What is the maximum range of lateral rotation of the shoulder joint?

    <p>80 degrees</p> Signup and view all the answers

    Which of the following muscles is involved in horizontal abduction of the shoulder joint?

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

    What is the reference position for measuring horizontal movements of the shoulder joint?

    <p>90 degrees abduction of the shoulder joint in the frontal plane</p> Signup and view all the answers

    Which of the following movements of the shoulder joint has the smallest range?

    <p>Horizontal abduction</p> Signup and view all the answers

    Which muscle is involved in both horizontal adduction and abduction of the shoulder joint?

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

    What is the total range of transverse movements of the shoulder joint?

    <p>Less than 180 degrees</p> Signup and view all the answers

    Which of the following movements involves scapular rotation in addition to shoulder joint motion?

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

    Which muscle is primarily responsible for flexion of the interphalangeal (IP) joint of the thumb?

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

    Which of the following muscles is classified as an extrinsic extensor of the digits?

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

    What is the primary action of the palmar interossei muscles?

    <p>Adduction of the digits</p> Signup and view all the answers

    Which of the following movements of the metacarpophalangeal (MCP) joint of the thumb has the smallest range of motion?

    <p>Abduction/Adduction</p> Signup and view all the answers

    What is the maximum range of flexion at the distal interphalangeal (DIP) joint of the fingers?

    <p>90°</p> Signup and view all the answers

    Which muscle is responsible for abduction of the little finger?

    <p>Abductor digiti minimi</p> Signup and view all the answers

    Which of the following muscles is an extrinsic extensor of the thumb?

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

    What is the maximum range of hyperextension at the proximal interphalangeal (PIP) joint of the fingers?

    <p>5°-10°</p> Signup and view all the answers

    Which of the following muscles is an intrinsic flexor of the digits?

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

    What is the primary action of the dorsal interossei muscles?

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

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