Abstract: Altogether 320 cases with seizures as initial symptoms were studied retr ospectively. They were categorized as different factors, and the percentages of causes for seizures from different groups were evaluated by statistic software S PSS 10.0 . The causes for acute and chronic seizures were different. The varied etiological data from different age groups and different onset styles sh owed that the percentages of causes for seizures were significantly different be tween the two groups with different onset styles (P= 0.00). A seizure always presents in various diseases and it shows very complicated poten tial causes to be discoveried. However, we believe some intrinsic relations amon g the seizure causes and some other clinical characters can be traced based on t his study. To figure out the relations among the causes of seizures and age grou ps, seizure patterns and varied onset styles will play an important role for neu rologists to make prompt diagnosis.

Key words: seizure, epilepsy, etiology, diagnosis