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Sciatica, pain in the distribution of the sciatic nerve in the leg caused by compression or irritation of the nerve. The pain may resemble an electric shock and be associated with numbness and tingling in the skin area served by the nerve. One of the most common causes is a slipped disk in the lower lumbar spine.

See also: Nervous system.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Sato, Eisaku to Serra, Junípero