Question at position 5 Which of the following covers the anterior carpal bones and creates the carpal tunnel?Palmaris longusExtensor retinaculumFlexor retinaculum单项选择题
A
Palmaris longus
B
Extensor retinaculum
C
Flexor retinaculum

Question

Question at position 5 Which of the following covers the anterior carpal bones and creates the carpal tunnel?Palmaris longusExtensor retinaculumFlexor retinaculum

BlackTom AI · Accepted Answer

Question at position 5: Which of the following covers the anterior carpal bones and creates the carpal tunnel? Palmaris longus, Extensor retinaculum, Flexor retinaculum.
Option 1: Palmaris longus. This muscle tendon is superficial in the forearm and contributes to the thenar crease in some individuals, but it does not form or cover the carpal tunnel. It has no role in creating the carpal tunnel.
Option 2: Extensor retinaculum. The extensor retinaculum is located on the posterior aspect of the wrist and holds the extensor tendons in place. Since the question asks about the anterior carpal bones and the carpal tunnel, this dorsal structure is not related to the carpal tunnel roof.
Option 3: Flexor retinaculum. The flexor retinaculum (transverse carpal ligament) spans the anterior aspect of the carpal bones and forms the roof of the carpal tunnel, constraining the flexor tendons and median nerve within the tunnel.
Thus, the statement that best matches the description is that the flexor retinaculum covers the anterior carpal bones and creates the carpal tunnel.

Question at position 5 Which of the following covers the anterior carpal bones and creates the carpal tunnel?Palmaris longusExtensor retinaculumFlexor retinaculum单项选择题

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