Hand

Question 1

Most common intercarpal coalition

Answer 1

– lunotriquetral (congenital)

Question 2

Strongest part of the scapholunate ligament?

Answer 2

Dorsal

- a tear of the dorsal ligament can lead to a DISI deformity and scapholunate advanced collapse (SLAC)

Question 3

Strongest part of the lunotriquetral ligament?

Answer 3

Volar

- a tear leads to VISI deformity

Question 4

Stabilizer of the thumb CMC joint?

Answer 4

Primary stabilizer: volar beak ligament

Question 5

What is the site of lunate dislocation called for perilunate dislocation injuries?

Answer 5

Space of Poirier between the radioscaphocapitate and the long radiolunate

Question 6

These 4 muscles flex the MP joint and extends the PIP and DIP joint

Answer 6

Lumbricals

• 4 total (Small and ring are innervated by Ulnar n. and index and long are innervated by the Median n.)
• Originate from FDP tendon and insert on dorsal surface of middle and distal phalanx with 2 different slip insertions.
• Located on the radial side of the fingers and join the interossei to for the lateral band

Question 7

Interossei

Answer 7

Palmar adduct pAD
Dorsal abduct dABs
- Originate from metacarpals and join lumbricals on lateral band
- Innervation: Ulnar nerve

Question 8

During recovery of radial nerve palsy what is the last muscle to be reinnervated

Answer 8

Extensor indices proprius