Wrist Anatomy ASHT

Question 1

space of Poirier

Answer 1

triangular space in palmar wrist capsule in interval between capitate and lunate bc no ligaments to support. Weak area through which lunate can dislodge in perilunate dislocation

Question 2

cubital fossa

Answer 2

anterior elbow - triangle between PT, BR and epicondyles. Medial>lateral median N - brachial A - biceps tendon - Radial N

Question 3

Mobile wad ?henry

Answer 3

BR, ECRL, ECRB

Question 4

Where is worst place for a scaphoid fracture?

Answer 4

proximal pole, least vascular due to retrograde vascular supply, longest healing time

Question 5

only tendon insertion on carpals

Answer 5

FCU on pisiform, dynamic stabilizer of Pisotriquetral joint

Question 6

Pisiform

Answer 6

insertion for FCU, ulnar border of Guyon’s canal

Question 7

hook of hammate- what does it contribute to? Why are injuries bad ?

Answer 7

border of carpal tunnel and guyons canal, injuries can damage neurovascular structures - ulnar N ulnar A flexor tendons

Question 8

ulna moves more distal/dorsal in

Answer 8

pronation

Question 9

muscles that stabilize the wrist

Answer 9

ECU stabilizes medially and APL stabilizes laterally (no collateral ligaments at the wrist)

Question 10

scapholunate injury

Answer 10

FCR becomes stabilizing force

Question 11

Camitz procedure

Answer 11

Palmaris longus tendon transfer for opposition

Question 12

arcade of frohse

Answer 12

radial/PIN compresion site between humeral and ulnar potions of supinator

Question 13

capitate-lunate angle

Answer 13

30* >30=instability

Question 14

scapho-lunate angle

Answer 14

30-60*