Anatomy

Question 1

Extensor tendon compartments (6)

Answer 1

1 - EPB, APL
2 - ECRB, ECRL
3 - EPL
4 - Ext Ind, EDC
5 - EDM
6 - ECU

Question 2

Ligament assoc w/ Boutonniere deformity

Answer 2

Oblique retinacular ligament
Creates DIP extension with tightening
Lateral bands go VOLAR

Question 3

Ligament assoc w/ swan neck deformity

Answer 3

Transverse retinacular ligament

Lateral bands go DORSAL

Question 4

Where central slip inserts

Answer 4

P2 base

Question 5

Where lateral band inserts

Answer 5

P3

Question 6

Supply of deep palmar arch

Answer 6

Radial artery

Question 7

Supply of superficial palmar arch

Answer 7

Ulnar artery

Question 8

Artery-nerve relationship in palm

Answer 8

Artery is VOLAR

Question 9

Artery-nerve relationship in digits

Answer 9

Artery is DORSAL (D=D)

Question 10

Source of princeps pollicis artery

Answer 10

Deep palmar arch
Runs between 1st dorsal IO + adductor pollicis
Supplies ULNAR side of thumb

Question 11

Relationship of deep + superficial palmar arches

Answer 11

Deep is PROXIMAL

Question 12

Source of digital arteries

Answer 12

Superficial palmar arch

Dominant arteries are closer to midline

Question 13

Ligament assoc w/ thumb CMC arthritis

Answer 13

Anterior oblique ligament

Question 14

Which tendon has 2 slips in DeQuervain’s

Answer 14

APL

EPB is DORSAL (ULNAR)

Question 15

AIN innervation

Answer 15

IF+LF FDP
FPL
Pronator quadratus

Question 16

MC muscle attachments

Answer 16

MC1 = APL, opponens pollicis
MC2 = ECRL
MC3 = ECRB
MC5 = ECU, opponens minimi

Question 17

What recovers first after nerve injury

Answer 17

Sympathetic activity

Question 18

Gap needed to do autograft nerve repair

Answer 18

> 2.5-3 cm

Question 19

Blood supply for gastroc flap

Answer 19

Sural artery

Question 20

Blood supply for gracilis free flap

Answer 20

MFCA

Question 21

Blood supply for lateral arm flap

Answer 21

Posterior radial collateral artery

Question 22

Blood supply for radius vascular flap (for scaphoid)

Answer 22

1-2 intercompartmental supra-retinacular artery

Question 23

Radial nerve innervation (BBEAT)

Answer 23

BR
Brachialis
ECRL
Anconeus
Triceps

Question 24

PIN innervation (7 E’s, AS)

Answer 24

ECRB
EDC
EDM
ECU
EPB
EPL
EIP
APL
Supinator

Question 25

Median nerve innervation in the hand (OLAF)

Answer 25

Opponens pollicis Lumbricals 1+2 APB FPB (superficial head)

Question 26

Ulnar nerve innervation in the hand (OIF A FLAP)

Answer 26

Opponens minimi IO FDMB Adductor pollicis FPB (deep head) Lumbricals 3+4 Adductor minimi Palmaris brevis

Question 27

Which finger flexor has dual innervation

Answer 27

FDP (medial IF/LF, ulnar RF/SF) FDS all median

Question 28

Blood supply to scaphoid

Answer 28

Dorsal carpal branch from radial artery - proximal 80%

Question 29

TFCC components (6)

Answer 29

``` R-U ligaments (Dorsal + volar) Central articular disc Meniscus homolog Ulnar collateral ligament ECU subsheath Origin of U-L and U-T ligaments ```

Question 30

What is space of Poirier

Answer 30

Between RSC and long Radiolunate (RLT) ligaments Where lunate dislocates

Question 31

Primary carpal stabilizer after PRC

Answer 31

Radioscaphocapitate

Question 32

What is ligament of Testut and Keuntz

Answer 32

Radioscapholunate NOT A TRUE LIGAMENT NV conduit

Question 33

What is Bunnel's test

Answer 33

For Intrinsic vs extrinsic tightness PIP tight with MCP extended = intrinsics PIP tight with MCP flexed = extrinsics

Question 34

Finger flexor with a shared muscle belly

Answer 34

FDP

Question 35

Relationship of intrinsic tendons to transverse MC ligament (I-D)

Answer 35

Lumbricals go VOLAR | IO go DORSAL (I-D)

Question 36

What is the most radial structure in the carpal tunnel

Answer 36

FPL

Question 37

IO origin/insertion

Answer 37

Origin: MC Insertion: P1 base + ext mechanism

Question 38

Lumbrical origin/insertion

Answer 38

Origin: FDP (radial side) Insertion: Lateral bands (radial side)

Question 39

Blood supply for lat dorsi flap

Answer 39

Thoracodorsal artery

Question 40

Blood supply for anterolateral thigh flap

Answer 40

Descending branch of lateral femoral circumflex artery

Question 41

Endoneurium

Answer 41

Covers axons

Question 42

Perineurium

Answer 42

Covers fascicles (groups of axons)

Question 43

Epineurium

Answer 43

Covers groups of fascicles