Question
A 26-year-old woman comes to the physician because of painful paresthesias in her foot. Examination shows decreased sensation in the first interdigital space and a hallux valgus deformity. This patient’s paresthesias are most likely caused by compression of which of the following nerves?
| A. |
Superficial peroneal nerve
|
| B. |
Tibial nerve
|
| C. |
Deep peroneal nerve
|
| D. |
Saphenous nerve
|
Show Answer
|
Correct Answer � C
Explanation
|
|
Answer C) Deep peroneal nerve
Deep peroneal nerve
The deep peroneal nerve provides sensory innervation to the skin between the first two toes. It also provides motor innervation to the muscles of the anterior compartment of the leg (e.g., tibialis anterior, extensor hallucis longus, extensor digitorum longus), which dorsiflex the toes and ankle joint; thus, injury to the nerve can result in a high-stepping gait.
Deep peroneal nerve compression can be caused by tight-fitting shoes, which are suggested by this patient’s hallux valgus deformity (bunion). It may also occur following trauma, especially navicular fracture.
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