Kernig sign


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Ker·nig sign

(ker'nig),
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.

Kernig sign

Neurology Pt lies on back and flexes thigh upward, then complete extension of leg is impossible, typical of meningitis, see there.

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.

Kernig,

Vladimir, Russian physician, 1840-1917.
Kernig sign - a failure of leg extension present in various forms of meningitis.
References in periodicals archive ?
At hospital admission, she was unresponsive, febrile, and had neck stiffness and Kernig sign.
8 ture, [degrees]C Reduced level of ++ +++ + +++ consciousness Generalized seizures ++ + Neck rigidity and + ++ + ++ Kernig sign Nausea, vomiting + ++ + ++ Upper motor neuron + + pattern of muscle weakness Relapse of + + febrile illness Outcome a d a a d Advanced disease Cognitive decline ++ + ++ Apathy + + Dysarthria +++ ++ ++ Dysphagia Brisk deep ++ ++ ++ tendon reflexes Spastic quadri/ +++ + ++ paraparesis Increased muscle tone + + + Babinski sign + + + Spastic gait +++ ++ ++ Falls + ++ Sphincter dysfunction + ++ Extrapyramidal + + ++ rigidity Obesity + + + Cachexia + + Overall duration 18 11 A 48 10 of illness mo wk mo wk Family 3 Family 4 Feature 3-1 3-2 4-1 4-2 4-3 Sex F M M F F Age at onset, y 31 21 51 47 36 Febrile stage of illness Duration, wk ND 2 ND ND 4 Maximum tempera- 39.