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Kernig sign

Pronunciation: ker'nig

Definition: with the patient supine, and the thighs and knees flexed, the legs cannot be passively extended at the knees; a sign of meningeal irritation, specifically, involuntary contraction of the hamstring muscles due to irritation of the nerve roots supplying them.

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© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.