QuestionSBA
QuestionChoice
This is incorrect. The median nerve is classically susceptible to palsy in carpal tunnel syndrome. Median nerve injury would present with sensory loss to the palmar aspect of the lateral three and a half digits. Motor deficits vary depending on the location of the median nerve lesion, with lesions at the elbow leading to a loss of pronation of the forearm and weak wrist flexion, and lesions at the wrist leading to paralysis of the thenar muscles and opponens pollicis.
10026051
b
Median nerve
QuestionChoice
This is incorrect. The axillary nerve is classically injured following a humeral neck fracture or dislocation. It presents with sensory loss to the 'regimental badge' area (the inferior region of the deltoid) and weakness of shoulder abduction.
10026053
d
Axillary nerve
QuestionChoice
This is incorrect. Isolated musculocutaneous nerve injury is rare; it is often injured as part of a brachial plexus injury. However, it would present with sensory loss to the lateral part of the forearm and weakness of elbow flexion and supination.
10026054
e
Musculocutaneous nerve
QuestionChoice
This is correct. The radial nerve is classically damaged in humeral midshaft fractures, and palsy results in wrist drop (inability to extend the wrist). The radial nerve gives sensory innervation to a small area on the dorsum of the hand between the 1st and 2nd metacarpals.
10026050
a
Radial nerve
QuestionChoice
This is incorrect. The ulnar nerve is classically susceptible to damage following a fracture of the medial epicondyle. It would present with sensory loss to the medial one and a half digits, and weak wrist flexion. The classic sign is a 'claw hand'.
10026052
c
Ulnar nerve
Concept
Chapter
2693
3950
Radial nerve injuries
Topic
145
Orthopaedics
17608
A 26 year old man is brought to the emergency department after falling off a ladder. An x-ray shows a fracture of the midshaft of his right humerus.

Following management of the fracture, it is noted that the man cannot extend his right wrist, and has sensory loss to the area between the dorsal aspect of the 1st and 2nd metacarpals on his right side. Examination of the left upper limb is normal.

Which of the following nerves has been damaged?
a