Central Group Hand Muscles

Question 1

Adductor pollicis (AP)

Answer 1

O: obl. head- base 2/3 mc’s
tran head- ant. surface of 3 mc
I: both heads- med. base prox. phalanx thumb
N: Ulnar
F: Thumb add.

Question 2

Lumbrical Muscles

Answer 2

O: Tendon of flex. dig. prof. (FDP) of each finger (2- rad. side, 3/4- rad/uln sides, 5- rad. side
I: Dorsal dig. exp. 4 med. fingers
N: 1/2 Med. 3/4 Ulnar
lumb. #1=index
lumb. #2= middle
lumb. #3= ring
lumb. #4= little
N: median (1 & 2) ulnar (3 & 4)
F: flex. of fingers #2-5 @ mcp joints
ext. of fingers #2-5 @ PIP & DIP joints

Question 3

Dorsal Interossei

Answer 3

4 DAB
O: Sides met. bone 1-5
I: 1- med 2- med 3-lat/med, 4- lat 5- lat
N: Ulnar
F: Finger abd.

Question 4

Palmar interossei

Answer 4

3 PAD
O: 1.) Ulnar side bone 2
2.)
I: 1.) 2-uln. base prox. phal./ext. exp
2.) rad. base prox. phal/ext. exp. dig. 4/5
N: Ulnar