Deep Peroneal N. injury

[phd89]

When the neck of the fibula is fractured is it always a superficial peroneal N. injury? I've seen questions were it says the patient was hit around the neck of the fibula area and the answer being deep peroneal n. injury instead of Superficial N. injury.

When is it
Common Peroneal N vs
deep peroneal n vs
superficial peroneal n. injury

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[Phloston]

When the neck of the fibula is fractured is it always a superficial peroneal N. injury? I've seen questions were it says the patient was hit around the neck of the fibula area and the answer being deep peroneal n. injury instead of Superficial N. injury.

When is it
Common Peroneal N vs
deep peroneal n vs
superficial peroneal n. injury

Neck of fibula can be common, deep or superficial. The common peroneal nerve bifurcates at the neck of fibula into the superficial peroneal nerve (within the lateral compartment) and the deep peroneal nerve (within the anterior compartment). Any question we get on this stuff will give specific Sx. We'd make the diagnosis based on the Sx, not just the location, but remember the lateral vs anterior compartments.

 

[usmle270]

Deep peroneal nerve > difficulty in dorsiflexion

Superficial peroneal nerve > difficulty in eversion

Look for this in the question stem

 

[Phloston]

Deep peroneal nerve > difficulty in dorsiflexion

Superficial peroneal nerve > difficulty in eversion

Look for this in the question stem

And, don't forget, although the superficial does all sensation for the dorsal aspect of the foot, the deep does sensation for the dorsal webbing between the 1st and 2nd toes.

 

[faisal 2000]

A 15 year old boy has suffered an injury to his right leg while playing soccer. He also noticed that he frequently trips over while walking thereafter. Physical examination should a tense swollen right lower extremitiy and a bruise over the upper lateral part of the shin area. Dorsiflexion is weakened and decreased sensation between the first and second big toes were also noticed. Which of the following nerves was most likely affected by this compartment syndrome?

A- Deep fibular
B- Superficial fibular
C- Common peroneal

 

[seminoma]

A. Too many hints in that question (lateral shin, dorsiflexion weak, sensation pattern). USMLE might tell you there was an injury, has trouble walking, loss of sensation in a small portion of the foot.

 

[faisal 2000]

i am confused about (upper lateral shin) so I think c