LearnWithTest

1 A 42-year-old man sustains a fracture at the surgical neck of the humerus following a road traffic accident. On examination, he is unable to abduct his arm beyond 15 degrees and has loss of sensation over the lateral aspect of the shoulder. Which nerve injury best explains these findings?

Suprascapular nerve Radial nerve Axillary nerve Musculocutaneous nerve

2 A patient presents with wrist drop following a mid-shaft fracture of the humerus. Sensation is also lost over the dorsal web space between the thumb and index finger. Which nerve is injured?

Median nerve Ulnar nerve Radial nerve Posterior interosseous nerve

3 A deep laceration on the medial side of the elbow results in loss of finger abduction and adduction along with clawing of the ring and little fingers. Which nerve is damaged?

Median nerve Radial nerve Musculocutaneous nerve Ulnar nerve

4 A patient with carpal tunnel syndrome complains of difficulty in opposing the thumb and has thenar muscle wasting. Which muscle is most directly responsible for this loss of function?

Adductor pollicis Opponens pollicis Abductor pollicis longus First dorsal interosseous

5 A fracture of the scaphoid bone is suspected in a patient with tenderness in the anatomical snuffbox. Which complication is most likely if the fracture is missed?

Osteomyelitis Avascular necrosis Septic arthritis Early union

6 A patient cannot flex the distal interphalangeal joint of the index and middle fingers following a deep forearm injury. Which muscle is primarily paralyzed?

Flexor digitorum superficialis Flexor digitorum profundus Lumbricals Interossei

7 After axillary lymph node dissection, a patient develops winging of the scapula that worsens when pushing against a wall. Which nerve injury explains this finding?

Spinal accessory nerve Suprascapular nerve Long thoracic nerve Dorsal scapular nerve

8 A patient with an elbow dislocation has loss of forearm pronation and weakened wrist flexion. Sensation is reduced over the lateral three and a half fingers. Which nerve is injured?

Radial nerve Median nerve Ulnar nerve Axillary nerve

9 A stab wound in the anatomical snuffbox causes profuse bleeding. Which structure is most likely injured?

Cephalic vein Ulnar artery Radial artery Superficial palmar arch

10 A patient cannot initiate abduction of the shoulder but can abduct the arm beyond 15 degrees with difficulty. Which muscle is primarily responsible for the initial loss?

Deltoid Supraspinatus Infraspinatus Teres minor

11 A patient presents with positive Froment sign when attempting to grip a piece of paper. Which muscle weakness causes this sign?

Flexor pollicis longus Adductor pollicis Opponens pollicis Abductor pollicis brevis

12 A fracture at the medial epicondyle of the humerus leads to sensory loss in the little finger and medial half of the ring finger. Which nerve is injured?

Median nerve Radial nerve Ulnar nerve Musculocutaneous nerve

13 A patient is unable to extend the metacarpophalangeal joints but can still extend the interphalangeal joints. Which muscle group is paralyzed?

Lumbricals Interossei Extensor digitorum Flexor digitorum profundus

14 A patient presents with loss of sensation over the lateral forearm after injury in the axilla. Which nerve is involved?

Radial nerve Median nerve Musculocutaneous nerve Ulnar nerve

15 Compression of neurovascular structures between the clavicle and first rib causes pain numbness and weakness in the upper limb. What is this condition called?

Cubital tunnel syndrome Carpal tunnel syndrome Thoracic outlet syndrome Pronator teres syndrome