Question:medium
All are seen in injury to the common peroneal nerve except?
All are seen in injury to the common peroneal nerve except?
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Sole sensation is tibial nerve territory; the common peroneal nerve covers the dorsum of the foot.
Updated On: Jun 24, 2026
- Loss of sensation over the sole
- Foot drop
- Injury to neck of fibula
- Loss of dorsiflexion of toe
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The Correct Option is A
Solution and Explanation
Frame the answer around two territories: what the common peroneal nerve does and where it does not reach. The common peroneal (fibular) nerve runs the anterior and lateral leg compartments, so it powers ankle and toe dorsiflexion through its deep branch and foot eversion through its superficial branch. The memory cue PED captures this: the Peroneal nerve Everts and Dorsiflexes.
Anatomically it loops around the fibular neck just under the skin, a spot where compression or fracture readily damages it. Sensory-wise it covers the anterolateral leg and the top (dorsum) of the foot.
From this, the expected findings after injury are: foot drop because dorsiflexion and eversion are lost, an injury site at the neck of the fibula, and loss of toe dorsiflexion. All three of those match listed options and are genuine features.
The remaining option is loss of sensation over the sole. The sole is innervated by the tibial nerve through its medial and lateral plantar branches, not by the peroneal nerve. Loss of sensation on the sole therefore signals tibial nerve damage, making it the false statement here.
\[\boxed{\text{Loss of sensation over the sole}}\]
Anatomically it loops around the fibular neck just under the skin, a spot where compression or fracture readily damages it. Sensory-wise it covers the anterolateral leg and the top (dorsum) of the foot.
From this, the expected findings after injury are: foot drop because dorsiflexion and eversion are lost, an injury site at the neck of the fibula, and loss of toe dorsiflexion. All three of those match listed options and are genuine features.
The remaining option is loss of sensation over the sole. The sole is innervated by the tibial nerve through its medial and lateral plantar branches, not by the peroneal nerve. Loss of sensation on the sole therefore signals tibial nerve damage, making it the false statement here.
\[\boxed{\text{Loss of sensation over the sole}}\]
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