Final answer:
True seizures are caused by abnormal electrical activity in the brain and are usually associated with epilepsy. Seizure-like activity may mimic the symptoms of seizures but is not caused by abnormal brain activity.
Step-by-step explanation:
True seizures are differentiated from seizure-like activity through a variety of criteria. True seizures are caused by abnormal electrical activity in the brain and are usually associated with epilepsy. They are characterized by specific patterns of brain wave activity, such as the presence of epileptiform discharges on an EEG. Seizure-like activity, on the other hand, may mimic the symptoms of a seizure but is not caused by abnormal brain activity. It can be caused by other factors such as syncope, psychogenic nonepileptic seizures, or movement disorders like tremors or tics