The Hand

Question 1

what is the anatomical snuff box also called

Answer 1

radial fossa

Question 2

what makes up the ulnar border of the anatomical snuff box

Answer 2

tendon of the extensor pollicis longus

Question 3

what makes up the radial border of the anatomical snuff box

Answer 3

tendons of the abductor pollicis longus and extensor pollicis brevis

Question 4

what makes up the proximal border of the anatomical snuff box

Answer 4

styloid process of the radius

Question 5

what makes up the floor of the anatomical snuff box

Answer 5

carpal bones

Question 6

what makes up the roof of the anatomical snuff box

Answer 6

skin

Question 7

what is the contents of the anatomical snuff box

Answer 7

radial artery, radial nerve branch, cephalic vein

Question 8

fracturing what causes pain in the anatomical snuff box

Answer 8

scaphoid

Question 9

what are the 8 carpal bones

Answer 9

scaphoid, lunate, triquetrum, pisiform, trapezium, trapezoid, capitate, hamate

Question 10

what is the blood supply to the hand

Answer 10

• the ulnar and radial nerve link together to form the deep and superficial palmar arches
• common digital arteries

Question 11

how many flexor tendons are attached too each digit

Answer 11

2 to the fingers and 1 to the thumb

Question 12

what are the 2 flexor tendons attached to the fingers

Answer 12

flexor digitorum profundus and flexor digitorum superficialis

Question 13

what is the flexor tendon attached to the thumb

Answer 13

flexor carpi radialis tendon

Question 14

why must the flexor tendons be attached to the bone via sheaths

Answer 14

otherwise there would be a bowstring affect which reduces the range of movement of the fingers

Question 15

what are lubricals

Answer 15

muscles that originate from the flexor digitorum profundus and wrap distally and laterally around the finger to insert to the extensor hood

Question 16

what do the lumbricals cause

Answer 16

flexion at the MCP joint and extension at the IP joints

Question 17

which nerves innervates the lumbricals

Answer 17

• ulnar innervates the medial 2 but the median innervates the lateral 2

Question 18

what are the interossei

Answer 18

muscles located between the metacarpals and are either dorsal or palmar

Question 19

what do the interossei do

Answer 19

abduction and adduction of fingers

assist lumbricals

Question 20

what are the movements of the hand

Answer 20

cylindrical grasp, hook, palmar, spherical grasp, lateral