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Anatomy · Upper limb: carpal tunnel
Sample itemWhich structure passes superficial to the flexor retinaculum and therefore is not compressed in carpal tunnel syndrome?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Palmaris longus tendon
The carpal tunnel contains the median nerve and nine flexor tendons. The palmaris longus tendon lies superficial to the flexor retinaculum.
Option by option
A. Palmaris longus tendon (correct)
Correct. Palmaris longus crosses superficial to the tunnel roof.
B. Median nerve
The median nerve is the structure compressed in carpal tunnel syndrome.
C. Flexor pollicis longus tendon
Flexor pollicis longus is one of the tunnel tendons.
D. Flexor digitorum superficialis tendons
The four flexor digitorum superficialis tendons lie within the tunnel.
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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