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Dermatome Chart! (Multimedia)
Click on the thumbnail to view a multimedia presentation on dermatomes.
Definition
Dermatome is Greek word which literally means "skin cutting".
A dermatome is an area of the skin supplied by nerve fibers originating
from a single dorsal nerve root.
A knowledge of the dermatome map is essential in order to recognize
nerve root damage or radiculopathy. Radiculopathy is suspected when there
is loss of sensation in a dermatome. The following are key dermatomes
and should be learnt:
C6 at the thumb.
T4 at the nipple.
T10 at the umbilicus.
L5 at the top of the foot.
S1 at the bottom of the foot.
S2-S4 at the perineum.
Click here to
view a picture of the dermatome map.
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