Random Forearm and Hand

Question 0

Contents of Snuff Box

Answer 0

radial artery on floor, radial styloid process proximally, base of 1st MC distally

scaphoid and trapezium in middle

Question 1

Borders of Snuff Box

Answer 1

Laterally/anteriorly- EPB tendon

Medially/ posteriorly- EPL tendon

Question 2

Palmaris Brevis

Answer 2

skin to palmar aponeurosis

deepen on hollow palm

Question 3

What is the flexor retinaculum?

Answer 3

aka transverse carpal ligament

covers carpal tunnel, attachment for muscles of thinner and hypothenar eminence

Question 4

What bones does flexor retinaculum span between?

Answer 4

scaphoid and trapezium to hook of hamate

Question 5

What is extensor expansion?

Answer 5

made up of 1 central band- middle phalanx

2- lateral bands - distal phalanx

dorsal hood- covers MCP, attaches to palmar plate

Question 6

What muscles attach to extensor expansion?

Answer 6

lumbricals, interossei and Extensor digitorum

Question 7

what do the intrinsic muscles do alone?

Answer 7

Flex MCP, EXT IP’s

Question 8

What do extrinsic muscles do alone?

Answer 8

hyperext MCP, Flex IP’s

Question 9

How many synovial sheaths on dorm of hand?

Answer 9

6 sheaths, 12 tendons, 9 muscles

Question 10

What does it sit between?

Answer 10

hyperthenar and thenar eminence

Question 11

What bones connects carpal tunnel?

Answer 11

scaphoid/trapezium- hook of hamate

Question 12

Contents of carpal tunnel

Answer 12

FDS, FDP, FPL, median nerve

Question 13

What is nearby carpal tunnel but not in it?

Answer 13

Ulnar A/N, FCR, FCU