Musculoskeletal Anatomy Quiz

Trisha Hoque Hossain
Quiz by Trisha Hoque Hossain, updated more than 1 year ago
Trisha Hoque Hossain
Created by Trisha Hoque Hossain almost 2 years ago
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Musculoskeletal Anatomy Quiz to ace your usmles

Resource summary

Question 1

Question
A 17-year-old boy is brought to the emergency department after sustaining a high impact injury to his arm during a baseball game. He reports being hit in the right shoulder with a batted ball, causing immediate pain and swelling in that region. Physical examination of the right upper extremity is limited by the patient's pain, and full motor and sensory examination are unable to be performed. X-ray of the shoulder shows a fracture of the surgical neck of the humerus. Which of the following additional finding will most likely be seen in this patient?
Answer
  • Laceration of the profunda brachii artery
  • Weakness in internal rotation of the arm
  • Weakness in the ability to abduct the arm at the shoulder
  • Weakness in the ability to elevate the scapula
  • Winging of the scapula

Question 2

Question
A 66-year-old woman with a history of osteoarthritis is brought to the physician because of difficulty walking after being bed-bound for an extended period of time. Physical examination shows an inability to dorsiflex the right foot against resistance but shows normal strength with plantar flexion. At rest, the right foot is maintained in an inverted position. There is reduced sensation on the dorsum of the right foot but normal sensation on the sole of the foot. Which of the following nerves is most likely injured?
Answer
  • Right common peroneal nerve
  • Right femoral nerve
  • Right obturator nerve
  • Right tibial nerve
  • Right sciatic nerve

Question 3

Question
A 17-year-old boy is brought to the emergency department after sustaining a high impact injury to his arm during a baseball game. He reports being hit in the right shoulder with a batted ball, causing immediate pain and swelling in that region. Physical examination of the right upper extremity is limited by the patient's pain, and full motor and sensory examination are unable to be performed. X-ray of the shoulder shows a fracture of the surgical neck of the humerus. Which of the following additional finding will most likely be seen in this patient?
Answer
  • Laceration of the profunda brachii artery
  • Weakness in internal rotation of the arm
  • Weakness in the ability to abduct the arm at the shoulder
  • Weakness in the ability to elevate the scapula
  • Winging of the scapula

Question 4

Question
A 24-year-old man who is a construction worker comes to the physician because of awkwardness in using his left hand. He reports that two months ago he fell on his outstretched hand and landed on the heel of the hand. Physical examination shows that the 4th and 5th fingers are extended at the metacarpophalangeal joints and flexed at the interphalangeal joints. Which of the following additional findings is most likely to be seen on physical examination?
Answer
  • Loss of sensation on the back of the thumb
  • Loss of sensation on the palmar side of the forefinger
  • Wasting of the interosseous muscles
  • Wasting of the thenar eminence
  • Wrist drop

Question 5

Question
A 66-year-old man is involved in a motor vehicle collision. Upon arrival, paramedics stabilize the patient's neck then transport him to the emergency department. He says that he has neck pain that radiates down the right arm. Physical examination shows a loss of sensation in a small region of the lateral upper right arm. An MRI of the spine shows a herniated intervertebral disc impinging on the right C5 nerve roots. Which of the following movements will most likely be affected?
Answer
  • Adduction of the thumb
  • Extension of the fingers
  • Flexion at the elbow
  • Flexion at the wrist
  • Pronation of the forearm
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