DSP and epilepsy with myoclonic atonic seizures: Of note, the association between LPFB and MAE was limited to patients without DSP while among carriers of DSP variants there was no difference in the prevalence of MAE in those with or without LPFB (P > 0.99); a significant linear increase (P < 0.001) in the prevalence MAE was observed going from patients without DSP with or without LPFB (20% with MAE) to patients with DSP without LPFB (40% with MAE) and patients with DSP with LPFB (86% with MAE).