Sensory Dermatome Maps

The word dermatome refers to a correspondence between the skin and the nervous system. Sensory dermatome maps used to help localize the level of neurologic deficit.

Levels of principal dermatomes
C5
Clavicles
C5, 6, 7
Lateral parts of upper limbs
C8, Th1
Medial sides of upper limbs
C6
Thumb
C6, 7, 8
Hand
C8
Ring and little fingers
Th4
Level of nipples
Th10
Level of umbilicus
Th12
Inguinal or groin regions
L1, 2, 3, 4
Anterior and inner surfaces of lower limbs
L4, 5, S1
Foot
L4
Medial side of great toe
S1, 2, L5
Posterior and outer surfaces of lower limbs
S1
Lateral margin of foot and little toe
S2, 3, 4
Perineum

References:
Greenberg SA. The history of dermatome mapping. Arch Neurol. 2003 Jan;60(1):126-31. [Medline]
Lee MW, McPhee RW, Stringer MD. An evidence-based approach to human dermatomes. Clin Anat. 2008 Jul;21(5):363-73. [Medline]

Created: Dic 31, 2008

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