Innervation of the skin: Dermatomes

A dermatome is an area of skin innervated by the cutaneous branches of a single spinal nerve (all spinal nerves except C1).

The dermatomes of the trunk are almost horizontal.

The upper limbs nerves come from the brachial plexus.

The anterior surface of the lower limbs come from the lumbar plexus nerves.

The posterior surface of the lower limbs come from the sacral plexus nerves.

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