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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.
Farlex Partner Medical Dictionary © Farlex 2012
Kernig signNeurology Pt lies on back and flexes thigh upward, then complete extension of leg is impossible, typical of meningitis, see there.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.
Ker·nig sign(ker'nig sīn)
When a subject is supine and the thigh is flexed to a right angle with the axis of the trunk, complete extension of the leg on the thigh is impossible due to pain; present in various forms of meningitis.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Kernig,Vladimir, Russian physician, 1840-1917.
Kernig sign - a failure of leg extension present in various forms of meningitis.
Medical Eponyms © Farlex 2012