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Anatomy · Lower limb: anterior tibial artery
Sample itemA displaced fracture of the proximal tibia and fibula compromises the foot pulse. Through which structure does the anterior tibial artery pass to reach the anterior compartment?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
C. Gap at the upper end of the interosseous membrane
The anterior tibial artery is a terminal branch of the popliteal artery. It passes forward through the gap at the upper end of the interosseous membrane into the anterior compartment, where it lies close to the bone and is vulnerable in fractures.
Option by option
A. Tendinous arch of soleus only
The soleal arch is traversed by the posterior tibial vessels and tibial nerve, not the anterior tibial artery.
B. Arcuate popliteal ligament
This ligament lies on the back of the knee joint and is not the route to the anterior compartment.
C. Gap at the upper end of the interosseous membrane (correct)
Correct. It passes through the upper gap of the interosseous membrane.
D. Adductor hiatus
This opening in adductor magnus transmits the femoral vessels to the popliteal fossa.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.
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