Preictal warning phenomena in focal epilepsy

Abstract

Objective: To summarize current evidence on the prevalence, phenomenology, and temporal characteristics of prodromal symptoms and early ictal manifestations (auras) in focal epilepsy, and to clarify their clinical relevance for patient counseling and management. Material and methods. A narrative review of the literature on prodromal symptoms and auras in focal epilepsy was conducted. Publications were identified through searches in PubMed/MEDLINE and by screening reference lists of key articles. Given the heterogeneity in definitions and time frames across studies, findings were analyzed qualitatively without meta-analysis, particularly emphasizing on practical aspects of clinical interviewing and safety recommendations. Results. Prodromal symptoms are reported in a substantial proportion of patients with focal epilepsy; reported prevalence varies depending on assessment methods and diagnostic criteria. Prodromes typically occur minutes to hours (less commonly a day or more) before seizure onset and may include affective, cognitive, and autonomic manifestations. According to the current classification by the International League Against Epilepsy, an aura is defined as a focal aware seizure and represents the ictal phase of the epileptic event. Clinically, auras are characterized by brief, stereotyped subjective experiences occurring seconds to minutes before potential seizure propagation. Patients’ responses to warning symptoms often include cessation of ongoing activities, seeking a safe environment, and alerting others, which may reduce the risk of injury. However, in some individuals, anticipatory anxiety and avoidance behaviors develop, negatively affecting quality of life. Conclusion. In patients with focal epilepsy, routine and systematic inquiry about prodromal symptoms and auras during clinical evaluation is advisable. Clinicians should carefully distinguish between prodromal and early ictal manifestations and help patients adopt proportionate safety measures without reinforcing hypervigilance or unnecessary restrictions in daily activities.