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Where do Spinal Nerve Roots Radiate?

Where do Spinal Nerve Roots Radiate?

February 28, 2021

A dermatome is what we call the area on the skin that a spinal nerve root innervates. If you have radiating symptoms in your arm or leg, this is a good place to start to identify what nerve roots might be compressed. It is not an exact map for everyone (nerves don’t follow exact rules), but along with muscle strength tests and reflex tests can help provide information for a diagnosis without an MRI.

Dermatome Map
By Grant, John Charles Boileau – An atlas of anatomy, / by regions 1962, Public Domain, https://commons.wikimedia.org/w/index.php?curid=30017222

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