or  Kernig's sign  n :  an indication usu. present in meningitis that consists of pain and resistance on attempting to extend the leg at the knee with the thigh flexed at the hip
 
Kernig, Vladimir Mikhailovich (1840-1917), Russian physician. Kernig first described his sign for cerebrospinal meningitis in 1882. In 1907 he published a full description.
 
 
 
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