QuestionSBA
QuestionChoice
The sural nerve is a purely sensory nerve of the lower limb and supplies the skin of the lateral ankle and lateral border of the foot. Any damage to the sural nerve will result in loss of sensation in those areas.
10027945
e
Sural nerve
QuestionChoice
The tibial nerve is a terminal branch of the sciatic nerve. It arises at the superior aspect of the popliteal fossa. It innervates the posterior compartment of the leg and many of the intrinsic muscles of the foot. Therefore, the motor deficit if the tibial nerve was affected would be loss of plantarflexion. These patients would not be able to walk on tip-toes.
10027942
b
Tibial nerve
QuestionChoice
The common peroneal nerve is a terminal branch of the sciatic nerve. It arises at the superior aspect of the popliteal fossa where the sciatic nerve splits into the common peroneal and the tibial nerves. The common peroneal nerve innervates the short head of the biceps femoris and muscles in the lateral and anterior compartments of the leg. Due to the loss of these muscles, the patient is unable to dorsiflex the affected foot which results in a high steppage gait.
10027941
a
Common peroneal nerve
QuestionChoice
The femoral nerve innervates the anterior thigh muscles and the skin of the anteromedial thigh medial leg and foot. While femoral nerve injuries are uncommon, we know that the functions of those muscles as well as sensation in that area will be lost. Patients may have weakness in hip flexion and active knee extension. Some hip flexion will remain intact due to the action of psoas major and minor in particular.
10027944
d
Femoral nerve
QuestionChoice
The sciatic nerve is the largest nerve in the body so has many functions. If the sciatic nerve were damaged, a patient may complain of pain down the entire posterior lower limb as well as weakness in dorsiflexion, plantarflexion, inversion and eversion of the ankle. The common peroneal and tibial nerves are branches of the sciatic nerve so make up those functions.
10027943
c
Sciatic nerve
Concept
Chapter
2693
3856
Foot drop
Topic
141
Neurology
17986
A 65-year-old presents with difficulty walking. On examination, you notice a high-stepping gait and difficulty dorsiflexing the right foot.

Which nerve has been affected?
a