1. These include absence, tonic clonic , and convulsive status epilepticus. 2. They preferred an adjective found in an 1849 citation, clonic spasm. 3. The person will become unconscious and may well have a tonic clonic seizure. 4. This passes into the clonic phase, in which the extremities twitch and jerk. 5. These can take the form of either absence seizures or tonic-clonic seizures. 6. Focalized and tonic clonic seizures are also common. 7. Her condition remained unchanged for 3 hours before she developed generalized tonic-clonic convulsions. 8. But the article Tonic clonic seizure has a whole section devoted to First aid procedures. 9. Nocturnal generalized tonic-clonic seizures, which may develop later, are another unfavorable sign. 10. As muscles contract during tonic-clonic seizures they outpace oxygen supplies and go into anaerobic metabolism.