Hand

Question 1

Bones of the hand (starting from lateral base of thumb to medial)

Answer 1

Scaphoid 
Lunate
Triquetrium 
Pisiform
Trapezium
Trapezoid 
Capatate
Hamate

Question 2

Intrinsic muscles

Answer 2

Palmaris brevis
Thenar and hypothenar muscles
Interosseous muscles
Lumbricals

Question 3

Intrinsic muscles - interosseous muscls

Answer 3

Palmar interossei muscles ADduct the digits (PAD)

Dorsal interossei muscles ABduct the digits (DAB)

Question 4

Intrinsic muscles - lumbricals

Answer 4

there are 4 (1 for each finger)
Span anterior aspect of MCP joints = cause flexion
Span posterior aspect of PIP joints = cause extension

Question 5

Palmar aspect nerve supply - which 3 nerves are involved

Answer 5

Median nerve
Ulnar nerve
Radial nerve

Question 6

Palmar aspect - median nerve

Answer 6

Sensory supply to the thumb (excluding base), index finger, middle finger and medial half of ring finger
Sensory supply to central/lateral palm

Question 7

Palmar aspect - ulnar nerve

Answer 7

Sensory supply to lateral half of ring finger and little finger
Sensory supply to medial palm

Question 8

Palmar aspect - radial nerve

Answer 8

Sensory supply to the skin over the base of the thumb

Question 9

Dorsal aspect nerve supply - which 3 nerves are involved

Answer 9

Radial nerve
Ulnar nerve
Median nerve

Question 10

Dorsal aspect - radial nerve

Answer 10

Sensory supply over the anatomical snuff box, proximal index finger, proximal middle finger, lateral aspect of proximal ring finger
Sensory supply to lateral part of dorsum of hand

Question 11

Dorsal aspect - Ulnar nerve

Answer 11

Sensory supply to medial aspect of ring finger, little finger
Sensory supply to medial part of dorsum of hand

Question 12

Dorsal aspect - median nerve

Answer 12

Sensory supply to the skin over the nail beds of thumb, index finger, middle finger and lateral aspect of ring finger

Question 13

Arterial supply

Answer 13

Radial and ulnar arteries
Superficial and deep arches
Common and proper digital arteries (end arteries)

Question 14

Thenar eminence

Answer 14

Thumb area, anterior

Question 15

Carpal tunnel

Answer 15

Combination of the carpal bones posteriorly and the flexor retinaculum anteriorly

Question 16

Carpal tunnel - contents

Answer 16

Tendons of FDS, FDP, FPL

Median nerve

Question 17

Carpal tunnel syndrome - when does it arise

Answer 17

If the median nerve is compressed due to swelling in the tunnel

Question 18

Carpal tunnel syndrome - which part of the median nerve is NOT affected?

Answer 18

Palmar cutaneous branch

- it is given of proximal to the tunnel (thus central palm sensation is unaffected in carpal tunnel syndrome)

Question 19

Anatomical snuff box - what is it

Answer 19

Triangular depression on the radial, dorsal aspect of the hand

Question 20

When would the anatomical snuff box become tender

Answer 20

Fractured scaphoid

Question 21

How do you anaesthetise a finger before hand surgery?

Answer 21

Ring block technique

- deposit LA in a ring around the base of the finger which anaesthetises all 4 proper digital nerves

Question 22

Why is adrenaline not used as a LA when preparing for hand surgery?

Answer 22

Proper digital arteries are end arteries