The Dorsal Digital Expansion Flashcards
What are the 4 extensor digiorum flattened to form what?
Extensor expansions
On attaching to the proximal, middle and distal phalanx there is what?
A number of ligaments which converge and diverge.
. Therefore, making the extensor insertion a complex interaction of tendon and ligaments.
Each extensor expansion is a triangular tendinous aponeurosis that wraps around what?
Wraps around the dorsum and sides of the head of the metacarpal and base of the proximal phalanx.
Once distal to the proximal phalanx, a number of ligaments stabilise what?
Stabilise the extensor expansion. These include the tendinous fibres of the interossei and lumbrical muscles
What are the main tendons which distally are the?
Middle and terminal conjoint tendons
The middle tendon attaches onto what?
Base of the middle phalanx
Where does the terminal tendon attach onto?
The base of the dital phalanx respectively
Which muscles attach onto the extensor expansion?
Extensor digitorm brevis manus muscle
Lumbrical msucle
Doral interossei muscle
Palmar interossei muscles
