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Dermatome Chart! (Multimedia)

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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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