A dermatome is an area of skin that is mainly supplied by a single spinal nerve.There are 8 cervical nerves (C1 being an exception with no dermatome), 12 thoracic nerves, 5 lumber nerves,and 5 sacral nerves. Each of these nerves relays sensation (including pain) from a particular region of skin to the brain.
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Disks, Spurs, Stenosis: Slippage, and OsteoporosisChapter 6
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Dermatome Map of the Body
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