In tonic phase, the patient will quickly lose consciousness, and the skeletal muscles will suddenly tense, which will cause the patient to fall if standing or sitting. It usually lasts for few seconds. While in clonic phase muscles will start to contract and relax rapidly, causing convulsions.
Treatment and Statistics
For treatment of grand mal seizures (generalized tonic-clonic seizures) a number of antiepileptic drugs (AEDs) are used for. Electroconvulsive therapy can be induced to treat grand mal seizure. Annual incidence has been estimated at 0.7 to 4.6/100,000 people in the general population, and 6 to 8/100,000 in children aged 0 to 15 years.