Hand: Nerves and Arteries

Question 1

dermatomes of hand

Answer 1

C6- thumb
C7- index and middle
C8- ring finger and pinky
T1- DOESN’t reach hand

Question 2

superficial palmar arch

Answer 2

ulnar artery- major source, digits 5-2.5 medial

radial artery- thumb and 2.5 lateral

Question 3

deep palmar arch

Answer 3

a branch of the radial artery, distal to the superificial palmar branch

Question 4

palmar metacarpal arteries

Answer 4

smal connections between the deep arch and common digital arteries

Question 5

common flexor sheath

Answer 5

a covering for tendons in the carpal tunnel. It’s continuous with the sheath of the 5th of the digit.
The 4-1 digits do their own things

Question 6

digital sheath v. common flexor sheath

Answer 6

infection of the digital sheaths will not likely spread into the palm

Question 7

extensor expansion (hood)

Answer 7

1 central band- insert into middle phalanx
2 lateral bands- distal phalanx
“hood” tranverse ligament surrounds tendon and serves as insertion for interossueus and lumbrical muscles

Question 8

common palmar digital artery

Answer 8

a branch of the superficial palmar branch of the radial artery

Question 9

princeps pollicis artery

Answer 9

arises from the radial artery, splits into radilais indicis artery (digit 2.5 lateral)

Question 10

proper palmar digital artery

Answer 10

digital artery, a branch of the radial artery