What is the flexor retinaculum also known as?

The flexor retinaculum, commonly referred to as the transverse carpal ligament, plays a critical role in the anatomy of the wrist. It is a fibrous band that spans across the wrist, forming the roof of the carpal tunnel. This structure is significant as it serves to hold the flexor tendons in place as they pass from the forearm to the hand, as well as to protect the median nerve that traverses through the carpal tunnel alongside these tendons.

The term "transverse carpal ligament" is used interchangeably with "flexor retinaculum" because both terms describe the same anatomical structure with a focus on its orientation and relation to carpal bones and tendons. Understanding this terminology is essential for comprehending conditions such as carpal tunnel syndrome, where pressure on the median nerve occurs due to alterations within this anatomical space.

In contrast, the other options do not refer to the same anatomical structure. The radial tunnel refers to an area associated with supplying nerves to the wrist extensors but is not related to the flexor tendons. The palmar aponeurosis is a thick, fibrous tissue in the palm that offers support but is distinct from the flexor retinaculum.