The application relates to markers for seizures and epilepsy. Polypeptide expression panels or arrays are provided, comprising one or more probes capable of binding specific polypeptides in blood plasma or blood serum of a mammalian subject. Also provided are methods for detecting seizure, methods for predicting seizure, use of sICAM-5 in the treatment of seizure, methods for assessing the effectiveness of a treatment of seizure, and diagnostic kits.