The attached image demonstrates the EEG pattern in absence seizure. In case of absence seizure, EEG demonstrates spike and wave discharge with frequency of 3 Hz. The spike and wave pattern indicate discharges that are synchronous and symmetrical. Reference: https://www.ncbi.nlm.nih.gov/books/NBK499867/#:~:text=In%20the%20case%20of%20childhood,unilateral%20focal%20spikes%5B2%5D. Image via: https://www.epilepsy.com/learn/types-epilepsy-syndromes/childhood-absence-epilepsy