QuestionSBA
QuestionChoice
This is incorrect. This is a classic example of foot drop, which is caused by common peroneal nerve injury. By contrast, tibial nerve damage would present with impaired foot plantarflexion and inversion, and sensory loss to the sole of the foot. The tibial nerve is not commonly injured as it is deep and well-protected. However, it can be injured in popliteal trauma and posterior knee dislocation.
10026048
d
Tibial nerve
QuestionChoice
This is correct. This is a classic example of foot drop, which is caused by common peroneal nerve injury. Because of the relatively superficial relation of the common peroneal nerve to the fibular head, the common peroneal nerve is susceptible to damage following compression by plaster casts.
10026045
a
Common peroneal nerve
QuestionChoice
This is incorrect. This is a classic example of foot drop, which is caused by common peroneal nerve injury. By contrast, sciatic nerve damage would present with impaired knee flexion and hip adduction, as well as impaired foot plantarflexion, eversion and foot drop. The sciatic nerve splits into the tibial nerve and common peroneal nerve and is susceptible to injury with lumbar disc herniation, posterior hip dislocation and direct trauma.
10026049
e
Sciatic nerve
QuestionChoice
This is incorrect. This is a classic example of foot drop, which is caused by common peroneal nerve injury. By contrast, femoral nerve damage would present with impaired hip flexion and sensory loss to the anterior and medial aspect of the thigh and lower leg. The femoral nerve is particularly susceptible to injury in hip and pelvic trauma.
10026046
b
Femoral nerve
QuestionChoice
This is incorrect. This is a classic example of foot drop, which is caused by common peroneal nerve injury. By contrast, obturator nerve damage will present with impaired hip adduction and sensory loss/paraesthesia over the inner aspect of the thigh. The obturator nerve is particularly susceptible to injury in anterior hip dislocation and pelvic surgery.
10026047
c
Obturator nerve
Concept
Chapter
2693
3773
Common peroneal nerve injury
Topic
145
Orthopaedics
17607
A 17 year old male fractures his left tibia while playing rugby. As part of his management, his tibia is immobilised in a plaster cast. After the cast is removed, he presents to his General Practitioner struggling to lift the front of his left foot from the floor. To compensate, he has been lifting each leg high in the air to allow him to walk.

Which of the following nerves has been damaged?
a