Meaning of KERNIG'S SIGN

WordNet Dictionary
	Definition:		[n]  symptom of meningitis; patient cannot extend the leg at the knee when the thigh is flexed because of stiffness in the hamstrings
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	See Also:		symptom
Biology Dictionary
	Definition:		Kernig's sign is a clinical sign which is present in meningitis. The subject lies down on his or her back and a thigh is flexed to form a right angle with the trunk (i.e. perpendicular to the plane the subject is lying). The examiner then attempts to extend the leg. A positive Kernig's sign is present if complete extension of the leg is not possible because of limitation by pain.