Dermatomes

A dermatome is an area of skin that is mainly supplied by a single spinal nerve. There are eightcervical nerves (C1 being an exception with no dermatome), twelve thoracic nerves, five lumbar nerves and five sacral nerves. Each of these nerves relays sensation (including pain) from a particular region of skin to the brain. (from wikipedia)

Image from Wikipedia (link)

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