.

Likewise, what happens during a tonic seizure?

A tonic seizure causes a sudden stiffness or tension in the muscles of the arms, legs or trunk. The stiffness lasts about 20 seconds and is most likely to happen during sleep. Tonic seizures that occur while the person is standing may cause them to fall. After the seizure, the person may feel tired or confused.

Additionally, are tonic seizures dangerous? A tonic-clonic seizure that lasts longer than 5 minutes needs immediate medical help. Call 911 for emergency help. A seizure that lasts more than 10 minutes, or three seizures in a row without the person coming to between them, is a dangerous condition.

Also to know, what is posturing during a seizure?

Decorticate posturing — a sign of severe damage to the brain — is a specific type of involuntary abnormal posturing of a person. Decorticate posture is stiff with legs held out straight, fists clenched, and arms bent to hold the hands on the chest. decorticate posturing.

What triggers tonic seizures?

The onset of generalized tonic-clonic seizures could be caused by a variety of health conditions. Some of the more severe conditions include a brain tumor or a ruptured blood vessel in your brain, which can cause a stroke. A head injury could also trigger your brain to cause a seizure.