Pseudo seizures are episodes that look and feel like epileptic seizures but aren’t caused by abnormal electrical activity in the brain. The medical term most commonly used today is psychogenic nonepileptic seizures (PNES), though many clinicians now prefer the name “functional seizures” because it’s less stigmatizing. These episodes are real, not faked. They fall under a broader category called functional neurological disorder, meaning the nervous system isn’t functioning properly even though there’s no structural damage or electrical misfiring.
About 20 to 30 percent of patients referred to specialized epilepsy centers for monitoring turn out to have PNES rather than epilepsy. On average, it takes roughly 7.5 years from the onset of symptoms for someone to receive the correct diagnosis, often after years of being treated with anti-seizure medications that do nothing for them.
How They Differ From Epileptic Seizures
From the outside, functional seizures can be nearly indistinguishable from epileptic ones. Both can involve convulsions, unresponsiveness, and falls. But several physical clues tend to separate them. Functional seizures are more likely to involve eyes closing at the start of the episode, side-to-side head or body movements, and a fluctuating course where the intensity changes throughout. They also tend to last longer than epileptic seizures and may be influenced by the presence of bystanders.
Epileptic seizures, by contrast, typically have an abrupt onset with eyes open, eye deviation to one side, and are followed by confusion or deep sleep. People who experience functional seizures are more likely to remember what happened during the episode, while epileptic seizures usually wipe out memory of the event entirely. None of these signs are absolute on their own, which is why a definitive diagnosis requires more than observation.
What Happens in the Body
Even though functional seizures don’t involve the electrical storms seen in epilepsy, they aren’t “nothing.” Research using heart rate monitoring during episodes shows a clear physiological pattern. In the five minutes before a functional seizure begins, heart rate rises significantly, reflecting a spike in the body’s fight-or-flight response. During the seizure itself, the nervous system shifts toward its calming branch, with measurable increases in parasympathetic activity. After the episode, heart rate drops and the body continues to wind down.
This pattern suggests the episodes may function as a kind of involuntary physical release of emotional or physiological tension. The person isn’t choosing to have a seizure any more than someone chooses to faint. The brain is converting psychological distress into a physical event, which is why these episodes were historically classified under “conversion disorder.”
Why They Happen
The psychological roots of functional seizures are well documented, though not every patient fits a single profile. Childhood trauma is one of the strongest risk factors. In a systematic review of 32 studies, about 33 percent of people with PNES reported a history of childhood sexual abuse, and roughly 30 percent reported childhood physical abuse. Psychological abuse during childhood is also an independent predictor. The more types of trauma a person experienced, the more likely they were to develop certain psychiatric symptoms alongside their seizures.
People with PNES have elevated rates of PTSD, depression, anxiety, and personality disorders. One prominent theory frames functional seizures as a dissociative phenomenon: when the brain encounters stress or intense emotion it can’t process, it essentially disconnects, producing seizure-like symptoms. This isn’t a conscious decision. Many patients are genuinely unaware of the emotional triggers behind their episodes, which is part of what makes diagnosis and treatment so challenging.
Not everyone with functional seizures has a trauma history, though. Some develop episodes following a period of intense life stress, medical illness, or even after witnessing someone else have a seizure. The common thread is that the brain’s normal stress-processing systems become overwhelmed.
How Diagnosis Works
The gold standard for diagnosing functional seizures is video-EEG monitoring, where a patient is admitted to a hospital unit and monitored with both video cameras and electrodes on the scalp for several days. The goal is to capture an episode on camera while simultaneously recording brain activity. In epileptic seizures, the EEG shows characteristic electrical discharges before, during, and after the event. In functional seizures, the EEG background stays completely normal throughout the entire episode, even during dramatic convulsive movements.
This test is definitive in nearly 90 percent of cases. Sometimes excessive muscle movement during a convulsive episode creates electrical noise on the recording, but if the brain’s baseline activity looks entirely normal in the seconds immediately before and after the event, that strongly points to PNES.
Treatment and Recovery
The first step in treatment is simply receiving the diagnosis, and for a surprising number of people, that alone makes a difference. In one study with a median follow-up of about four years, 46 percent of patients were seizure-free when contacted. Of those who stopped having episodes, nearly a third said their seizures ceased immediately after learning the diagnosis. Understanding what’s actually happening appears to break the cycle for some people.
For those who continue having episodes, cognitive behavioral therapy (CBT) is the best-studied treatment. In a randomized controlled trial, patients who received up to 12 sessions of CBT saw their median monthly seizure count drop from 12 to 1.5 over six months, compared to a drop from 8 to 5 in the group receiving standard medical care alone. The therapy focused on helping patients recognize early warning signs of an episode and interrupt the body’s response, gradually re-engage with activities they’d been avoiding, and address negative thought patterns fueling anxiety and low mood. The effect was large at the end of treatment and still present, though smaller, at the six-month follow-up.
Anti-seizure medications do not work for functional seizures because there is no abnormal electrical activity to suppress. Yet many patients spend years on these drugs before getting the right diagnosis, experiencing side effects with no benefit.
Long-Term Outlook
Recovery rates vary widely across studies. Complete remission ranges from as low as 7 percent to as high as 58 percent, depending on the population studied and how long patients were followed. More recent research puts the figure somewhere between 27 and 55 percent. The wide range reflects real differences in access to appropriate psychological treatment, the severity of underlying trauma, and how quickly the correct diagnosis is made.
Earlier diagnosis consistently predicts better outcomes. People who spend years being treated for epilepsy they don’t have tend to build their lives around being a “seizure patient,” making recovery harder. Those who receive an accurate explanation of their condition early, paired with psychological support, have the best chance of becoming seizure-free. The condition is treatable, but it requires the right kind of treatment: addressing the brain’s stress response rather than its electrical activity.