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

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

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

What is the muscle function of the C5 nerve root?

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

Which nerve root is responsible for finger abduction?

<p>T1 (C)</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 (C)</p> Signup and view all the answers

Which muscle is innervated by the C6 nerve root?

<p>Biceps (B)</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 (A)</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 (D)</p> Signup and view all the answers

Which of the following structures passes through the axillary space?

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

What is the shape of the axillary space?

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

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

<p>Thoracic duct (C)</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 (B)</p> Signup and view all the answers

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

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

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

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

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

<p>Teres major (A)</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 (C)</p> Signup and view all the answers

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

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

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

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

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

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

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

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

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

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

What is the primary action of the palmar interossei muscles?

<p>Adduction of the digits (B)</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 (A)</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° (C)</p> Signup and view all the answers

Which muscle is responsible for abduction of the little finger?

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

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

<p>Extensor pollicis longus (C)</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° (D)</p> Signup and view all the answers

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

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

What is the primary action of the dorsal interossei muscles?

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

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