What is another name for the extensor expansion ligament?

What is another name for the extensor expansion ligament?

• A. Flexor tendon sheath
• B. Extensor hood
• C. Dorsal interosseous membrane
• D. Extensor retinaculum

Answer: (B)

The extensor expansion ligament is also called the extensor hood. This structure is the expanded, fan-shaped fibrous band on the back of the fingers that the extensor digitorum tendon spreads into, forming part of the finger’s extensor mechanism. It distributes the tendon’s pull across the proximal, middle, and distal phalanges and provides attachment points for the lumbricals and interossei, allowing coordinated extension at the finger joints. The other options refer to different structures: the flexor tendon sheath surrounds flexor tendons, the dorsal interosseous membrane sits between the metacarpals, and the extensor retinaculum holds the extensor tendons at the wrist.

The extensor expansion ligament is also called the extensor hood. This structure is the expanded, fan-shaped fibrous band on the back of the fingers that the extensor digitorum tendon spreads into, forming part of the finger’s extensor mechanism. It distributes the tendon’s pull across the proximal, middle, and distal phalanges and provides attachment points for the lumbricals and interossei, allowing coordinated extension at the finger joints. The other options refer to different structures: the flexor tendon sheath surrounds flexor tendons, the dorsal interosseous membrane sits between the metacarpals, and the extensor retinaculum holds the extensor tendons at the wrist.