Psychogenic Non-Epileptic Seizures Diagnosis and Characteristics

Definition and Core Characteristics

• Psychogenic Non-Epileptic Seizures (PNES) are episodes involving motor, sensory, mental, or autonomic manifestations that mimic epileptic seizures but lack epileptogenic activity, affecting 20-30% of patients attending epilepsy centers and over 10% of seizure emergencies, according to the European Heart Journal 2

Clinical Distinction from Epileptic Seizures

• PNES demonstrate asynchronous, side-to-side thrashing movements, while epileptic seizures show symmetrical, synchronous bilateral movements, as noted by Praxis Medical Insights 1
• Eyes are typically closed during PNES, whereas they remain open during generalized epileptic seizures, as reported by Praxis Medical Insights 1
• PNES typically last less than 30 seconds, compared to 74-90 seconds for epileptic seizures, according to Praxis Medical Insights 1
• Lateral tongue biting is highly specific for epileptic seizures and uncommon in PNES, as stated by Praxis Medical Insights 1
• Chewing, smacking, and blinking suggest epileptic rather than psychogenic events, as indicated by Praxis Medical Insights 1
• Neuron-specific enolase, prolactin, and creatine kinase are not reliable for validating the diagnosis and should not be relied upon for differentiation, as noted by Praxis Medical Insights 1