MSK pt2 Quiz Questions Flashcards
A 4-year-old girl is brought to the emergency department by her parents after a day at the playground. The girl is holding her right arm close to her side, with the elbow slightly flexed and the forearm pronated. The parents were swinging their child by both arms, then she began to scream and cry. The attending physician diagnoses nursemaid’s elbow (radial head displacement). Which of the following structures encircles the head of the radius and is most likely affected in this patient?
Anular ligament
Which of the following structures on the ulna describes the articulating surface for the head of the radius at the proximal radio-ulnar joint?
Radial notch
Two medical students argue about the bones responsible for pronation. Which of the following takes place during pronation?
The distal end of the radius circumducts the distal end of the ulna
A physician performs a clinical test by asking the patient to adduct or medially deviate the hand. Which of the following muscles is he most likely testing?
flexor carpi ulnaris and extensor carpi ulnaris
A 30-year-old typist presents to your clinic with pain, numbness, and tingling on the lateral three and a half digits of her right hand. She states that the pain increases during the night. Physical examination reveals difficulty in opposition of her right thumb. Which of the following nerves is most likely affected in this patient?
median
Which of the following muscles is most likely affected to result in her weakened thumb opposition?
opponens pollicis
A 70-year-old woman presents with pain and numbness on the medial aspect of her right forearm and hand. Which of the following portions of the brachial plexus gives rise to the sensory nerve(s) that account for her symptoms?
medial cord
Which of the following dermatome(s) are affected in this patient with pain and numbness on the medial aspect of her right forearm and hand?
C8-T1
A 40-year-old woman presents to her physician with a 3-month history of worsening tingling, numbness, and weakness of the left hand. On physical examination, there is wasting of the hypothenar eminence and reduced sensation in the 4th and 5th digit. Which nerve is most likely affected in this patient?
ulnar
A 30-year-old pregnant woman presents to her physician with a 2-month history of worsening tingling, numbness of her wrist and palm. On physical examination, there is numbness elicited when the anterior surface of the wrist is lightly tapped (Tinel’s test). Which of the following is the most likely cause of this presentation?
carpal tunnel syndrome
A 19-year-old collegiate football player presents to the emergency department after falling hard on the wrist of his outstretched left arm during practice. He reports experiencing sudden pain when he fell. Physical examination of his wrist elicits sharp pain with palpation of the anatomical snuffbox. Which of the following carpal bones, also shown in the image, is most likely fractured in this patient?
scaphoid
A 25-year-old woman is admitted to the emergency department with acute pain and swelling of her distal forearm and hand after falling from her horse onto her outstretched hand. Radiographic imaging confirms a fracture (refer to the accompanying image), which is subsequently reduced and casted. Based on the patient history and radiographic studies, which of the following bones is fractured in this patient?
radius
Further imaging reveals that the shaft of the radius is anteriorly displaced. Which of the following types of fractures is identified in this patient?
Colle’s fracture
When a person is in anatomical position, which two muscles rotate the radius so the back of the hand faces forward?
pronator teres and pronator quadratus
What structure transmits part of the force applied to the distal radius (i.e. fall on an outstretched hand) to the ulna, and diminishes the stress transmitted from the wrist to the humerus?
interosseous membrane
The articulation of the elbow joint is formed by which of the following structures?
trochlea and capitulum of the humerus, trochlear notch of the ulna, radial head
A 6-year-old girl is brought to the physician’s office with painful left elbow. She was walking hand in hand with her mother when she tripped. To prevent her from falling, her mother pulled her left arm up. What structure has most likely been damaged?
anular ligament
Flexor digitorum superficialis has what action?
flexes proximal and middle phalanges of fingers 2-5
Superficial extensors of the forearm originate from?
lateral epicondyle of the humerus
Superficial flexors of the forearm originate from?
medial epicondyle of the humerus
A 33 year old man has a carrying angle of more than 19 degrees. What problem does he most likely have?
cubitus valgus and ulnar neuropathy
flexes the proximal phalanges of each finger
flexor digitorum superficialis
flexes the middle phalanges of each finger
flexor digitorum superficialis
flexes the distal phalanges of each finger
flexor digitorum profundus