Complex sentence: Atonic seizures (also called drop seizures, akinetic seizures or drop attacks), are a type of seizure that consist of a brief lapse in muscle tone that are caused by temporary alterations in brain function.
Split into simpler sentences: Atonic seizures (also called drop seizures, akinetic seizures or drop attacks), are a type of seizure. They consist of a brief lapse in muscle tone that are caused by temporary alterations in brain function.