Dorsal Digital Expansion

Question 1

What is an extensor expansion?

Answer 1

Traingular aponeuroses

Question 2

Where do the extensor expansions lie?

Answer 2

Wraps around the dorsum and sides of the head of the metacarpal and base of the proximal phalanx

Question 3

Which tendons form the extensor expansions?

Answer 3

Extensor digitorum tendons

Question 4

Which muscles attach to the extensor expansions?

Answer 4

Lumbricals and dorsal interossei

Question 5

Identify the structures labelled 1-5

Answer 5

1- Extensor expansion 2- Extensor digitorum tendon 3- Phalange 4- Dorsal interosseus 5- Lumbrical