Complex sentence: Genetic, congenital, and developmental conditions are mostly common among younger people; tumors strokes are more likely in older people; head trauma resulting in post-traumatic epilepsy and central nervous system infections may occur at any age.
Split into simpler sentences: Genetic, congenital, and developmental conditions are mostly common among younger people, while tumors strokes are more likely in older people. Head trauma resulting in post-traumatic epilepsy and central nervous system infections may occur at any age.