An eclamptic convulsion usually does not cause chronic brain damage unless intracranial haemorrhage occurs. An infant with Todd's paresis does not necessarily preclude the diagnosis of a febrile convulsion. Current passing through the brain induces an immediate but non-fatal general convulsion that produces unconsciousness. The lethal overdose syndrome in animals is characterized by convulsion and coma. Hypoglycemia should be considered if there is lethargy, limpness, convulsion, or loss of consciousness. The word "fit" is sometimes used to mean a convulsion or epileptic seizure. It was known to cause convulsion symptoms and hallucinations. Typically the pregnant woman develops hypertension and proteinuria before the onset of a convulsion (seizure). Its overuse can lead to water retention and dilutional hyponatremia with consequent convulsion. For example, ("KEIREN"; cramp, spasm, convulsion) is simplified following the model of and . This was Gardiner's first uremic convulsion. At age 37, he suffered his first generalised convulsion. Galvanotaxis is uncontrolled muscular convulsion that results in the fish swimming towards the anode. The resulting convulsion is modified by the muscle relaxant. Sometimes the convulsion can be caused by genetic defects or brain tumors.