What kind of seizure involves uncontrolled muscular contractions?

The type of seizure that involves uncontrolled muscular contractions is called a tonic-clonic seizure, previously known as a grand mal seizure. During this seizure, the individual experiences a tonic phase characterized by stiffening of the muscles, followed by a clonic phase involving rhythmic jerking movements. These seizures can result in loss of consciousness and may last for a few minutes.