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Examples of dermatomal patterns of radicular sciatica of L4 (A) and L5 (B). Image by Robert Trager, DC, using data from Lee's evidence based dermatome map, 2008. Image of leg modified from Andrea Allen (CC by 2.0), and image of foot modified from Pixel AddIct (CC BY 2.0).

Examples of dermatomal patterns of radicular sciatica of L4 (A) and L5 (B). Image by Robert Trager, DC, using data from Lee's evidence based dermatome map, 2008. Image of leg modified from Andrea Allen (CC by 2.0), and image of foot modified from Pixel AddIct (CC BY 2.0).

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Key points • Sciatica describes symptoms in the sciatic nerve distribution • Sciatic pain has various patterns corresponding to its nerve roots, nerve trunk, sensory distribution, or referred pain into these distributions • The broad definition of sciatica reflects the many disorders that cause it

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