What Are the Signs of a Tonic-Clonic Seizure?
A tonic-clonic seizure is a common, potentially severe type of generalized seizure that involves forceful muscle contractions and loss of consciousness and memory. Most tonic-clonic seizures last for about one to three minutes, though it is possible for an attack to last up to 30 minutes or for several seizures to occur in a short period of time. The first signs of a tonic-clonic seizure are typically a shrill cry followed by a collapse to the ground. Within a few seconds, a sufferer starts to convulse violently and uncontrollably. An individual who witnesses another person having a seizure should contact emergency medical services immediately.
