Which of the following structures is found most medially within the cubital fossa?

Question

BlackTom AI · Accepted Answer

To tackle this question, first recall the anatomical layout of the cubital fossa, which is the triangular depression on the anterior elbow. The contents are classically arranged from lateral to medial as tendon of the biceps brachii, the brachial artery, and the median nerve (the TAN mnemonic helps remember this order).

Option 1: Musculocutaneous nerve. This nerve typically travels laterally and anterior to the elbow and does not lie in the medial-most position within the cubital fossa. Its course is more superficial and lateral compared with the other contents in the fossa.

Option 2: Axillary artery. The axillary artery is located in the relatively proximal arm and shoulder region; it transitions to the brachial artery as it crosses the lower border of teres major, but it does not reside within the cubital fossa itself. Therefore this option is incorrect for the specified region.

Option 3: Brachial artery. The brachial artery is indeed a major vessel that traverses the cubital fossa, but within the fossa its position is medial to the tendon of the biceps and lateral to the median nerve, not the most medial structure.

Option 4: Median nerve. In the classic lateral-to-medial arrangement (TAN), the median nerve sits as the most medial structure in the cubital fossa, lying medial to the brachial artery and the biceps tendon. This makes it the correct choice for the question as stated.

Option 5: Tendon of Biceps Brachii m. The biceps tendon is the most lateral structure in the cubital fossa, not the medial-most one, so it cannot be the correct answer here.

Putting these observations together, the statement that the median nerve is found most medially within the cubital fossa aligns with the standard anatomical arrangement of its contents.

Which of the following structures is found most medially within the cubital fossa?

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