The beginning and end of the attack is usually sudden. This type of seizure most commonly begins in childhood and often stops by age 20. Atypical absence seizures may cause more extensive changes in muscle tone, or they may have a more gradual beginning and ending than typical absence seizures. Atonic seizures , also called epileptic drop attacks, are characterized by sudden limpness. Generally, all muscle tone and consciousness are lost.
Myoclonic seizures cause single or multiple muscle twitches, jerks or spasms.
The seizure begins with a sudden outburst and then a loss of consciousness. During this time the person might bite his tongue, lose control of body functions, and take very shallow breaths. This usually lasts for two or three minutes and is followed by limpness. Most people are able to return to their normal activities after resting. If the seizure begins again, call for emergency assistance.