SpinalCord
2
Dermatomes
Plate162
Levels of principal dermatomes
C5
Clavicles
C5, 6
Lateral sides of upper limbs
C8, T1
Medial sides of upper limbs
C6
Digit I (thumb)
C6, 7, 8
Hand
C8
Digits IV and V (ring and little fingers)
T4
Level of nipples
T10
Level of umbilicus
L1
Inguinal region
L1, 2, 3, 4
Anterior and inner surfaces of lower limbs
L4, 5, S1
Foot
L4
Medial side digit I (great toe)
L5, S1, 2
Lateral and posterior surfaces of lower limbs
S1
Lateral margin of foot and digit V (little toe)
S2, 3, 4
Perineum
Schematic demarcation of dermatomes
(according to Keegan and Garrett)
shown as distinct segments. There is
actually considerable overlap between
any two adjacent dermatomes. An
alternative dermatome map is that
provided by Foerster (see References).
C2
Trigeminal nerve (V)
C3
C4
C5
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
L1
L3
L4
L5
S1
L5
L4
C2
C3
C4
C5
C6
C7
C8
T1
T2
T3
T4
T5
T6
T7
T8
T9
T10
T11
T12
L1
L3
L2
L1
S1 S2
L4
S1
L5
L4
S2
S1
L5
L2
L3
L4
L5
S1
S2
S3
S4
S5
C6
T1
C5
C6
C8
C6
C7
C7
C8
C7
C8
S2, 3
L2
