Lower limb: popliteal fossa: practice question

A Anatomy question in the style of the NEET PG paper. Answer it first, then read why the right option is right and why each of the others is wrong.

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Anatomy · Lower limb: popliteal fossa

Sample item

A clinician cannot feel the popliteal pulse with the patient's knee extended. Which approach and anatomical reason is correct?

AFlex the knee and press deeply, because the artery is the deepest structure in the fossaBExtend the knee fully and press lightly, because the artery is the most superficial structureCExtend the knee and feel beneath sartorius, because the artery lies behind itDFlex the knee and feel lateral to biceps femoris, because the artery lies there

Original practice item, not a recalled exam question. Nothing here is recorded.

The answer and the reasoning

A. Flex the knee and press deeply, because the artery is the deepest structure in the fossa

In the popliteal fossa the tibial nerve is most superficial, the popliteal vein is deeper, and the popliteal artery lies deepest against the femur and joint capsule. The strong popliteal fascia is lax when the knee is flexed, so deep pressure with the knee flexed makes the pulse easier to feel.

Option by option

A. Flex the knee and press deeply, because the artery is the deepest structure in the fossa (correct)
Correct. The artery is deepest, so flexion and deep pressure are required.
B. Extend the knee fully and press lightly, because the artery is the most superficial structure
The artery is the deepest structure, not the most superficial, and extension tightens the fascia.
C. Extend the knee and feel beneath sartorius, because the artery lies behind it
Sartorius lies medially in the thigh and does not cover the fossa.
D. Flex the knee and feel lateral to biceps femoris, because the artery lies there
The artery lies centrally and deeply, not lateral to biceps femoris, which borders the 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.

Questions about this Anatomy question

What is the answer to this Anatomy question?

The best answer is A, Flex the knee and press deeply, because the artery is the deepest structure in the fossa. In the popliteal fossa the tibial nerve is most superficial, the popliteal vein is deeper, and the popliteal artery lies deepest against the femur and joint capsule.

Why is "Extend the knee fully and press lightly, because the artery is the mo…" not the answer?

The artery is the deepest structure, not the most superficial, and extension tightens the fascia.

Why is "Extend the knee and feel beneath sartorius, because the artery lies b…" not the answer?

Sartorius lies medially in the thigh and does not cover the fossa.

Why is "Flex the knee and feel lateral to biceps femoris, because the artery…" not the answer?

The artery lies centrally and deeply, not lateral to biceps femoris, which borders the fossa.

What concept does this question test?

It tests Lower limb: popliteal fossa in Anatomy. The strong popliteal fascia is lax when the knee is flexed, so deep pressure with the knee flexed makes the pulse easier to feel.

How hard is this question?

We tag it as an application question: it asks you to use a fact on a patient or a finding. The tag is our own editorial judgement, not an official difficulty rating, so read the reason for every option, not only the answer.

How should I study Lower limb: popliteal fossa?

Learn every nerve by its route, its muscles and what a lesion looks like at the bedside. That one habit answers a large share of questions. Then use the flashcards and the other Anatomy questions on this site to test what stuck.

Is this a real NEET PG question?

No. It is an original practice item (editorial status: sample, version 1). NextPrep does not publish recalled or leaked questions, and independent faculty review of this item has not been completed yet, so confirm important facts in a standard textbook.