<unk>  is one of the most common serious neurological disorders affecting about 39 million people . It affects 1% of the population by age 20 and 3% of the population by age 75. It is more common in males than females with the overall difference being small. Most of those with the disorder (80%) are in low income populations or the developing world. The estimated prevalence of active<unk>  () is in the range 3–10 per 1,000, with active<unk>  defined as someone with<unk>  who has had a least one unprovoked seizure in the last five years.<unk>  begins each year in 40–70 per 100,000 in developed countries and 80–140 per 100,000 in developing countries. Poverty is a risk and includes both being from a poor country and being poor relative to others within one's country. In the developed world<unk>  most commonly starts either in the young or in the old. In the developing world its onset is more common in older children and young adults due to the higher rates of trauma and infectious diseases. In developed countries the number of cases a year has decreased in children and increased among the elderly between the 1970s and 2003. This has been attributed partly to better survival following strokes in the elderly.
Epilepsy
Electrolyte imbalance
Stroke
Syncope (medicine)
Photosensitive epilepsy
Alcohol withdrawal syndrome
Temporal lobe epilepsy
Exploding head syndrome