Seizure can also refer to the act of taking hold of property, for this meaning see Seizure (law)
A video of a seizure. It also shows possble first aid.
Someone who has bitten the tip of their tongue while having a seizure
A convulsion or seizure happens when the body muscles contract and relax rapidly and repeatedly, resulting in uncontrolled shaking. Because epileptic seizures typically include convulsions, the term convulsion is sometimes used as a synonym for seizure. However, not all epileptic seizures lead to convulsions, and not all convulsions are caused by epileptic seizures.