PNES vs Epilepsy: Diagnosis and EEG Differences

Distinguishing between functional seizures (PNES) and epileptic seizures can be challenging because the conditions may look similar but need different care. Dr. Abhishek Gohel and Dr. Rutul Shah are NIMHANS-trained neurologists with epilepsy fellowship training. They assess suspected PNES and epilepsy and explain when Video EEG or other evaluation may be useful.

NCC context: Not every seizure-like event is epilepsy, and not every scan finding explains an event by itself. If NCC appears on a CT/MRI report, read the NCC seizure vs epilepsy guide for the cautious diagnostic frame.

Why Accurate Diagnosis Matters

Misdiagnosis can lead to unnecessary anti-seizure medication, avoidable restrictions and delayed appropriate care. Fellowship training supports careful evaluation, but no single symptom or behaviour confirms the diagnosis.

What Are PNES and Epilepsy?

What is Epilepsy?

Epileptic seizures result from abnormal electrical activity in the brain. These episodes are caused by synchronized, excessive neuronal firing that can be detected on EEG during seizures. Epilepsy is a neurological disorder with over 50 different seizure types, each with specific patterns of brain activity.

What is PNES?

Psychogenic non-epileptic seizures (PNES) are episodes that resemble epileptic seizures but are not caused by abnormal electrical brain activity. Instead, they result from psychological factors, stress, trauma, or underlying psychiatric conditions. PNES episodes are real medical events that require specialized treatment, but they don't respond to anti-seizure medications.

Common Misconception

PNES is NOT "fake" or "pretend." Patients with PNES are not voluntarily producing these episodes. The seizures are involuntary responses to psychological distress and require compassionate, specialized care. Unfortunately, stigma around PNES can delay proper treatment and worsen outcomes.

How Do PNES and Epilepsy Compare Side by Side?

Feature	Epileptic Seizures	PNES
Onset Pattern	Sudden, stereotyped onset • Same pattern every time • Often no warning • Focal seizures may have aura	Gradual onset • May have emotional trigger • Variable presentation • Often preceded by stress/anxiety
Duration	Usually brief (30 seconds - 3 minutes) • Consistent duration • Rarely over 5 minutes • Status epilepticus if >5 min	Often prolonged (2-20 minutes) • Highly variable duration • May wax and wane • Can appear to "restart"
Movement Characteristics	Rhythmic, stereotyped • Synchronous bilateral jerking • Tonic stiffening • Automatisms (lip smacking, etc.)	Asynchronous, variable • Side-to-side head movements • Pelvic thrusting • Tremor-like movements
Consciousness/Awareness	Complete loss or impairment • Cannot be aroused during seizure • Amnesia for event • No response to stimulation	May appear responsive • May close eyes tightly • Resist passive eye opening • Variable responsiveness
Common Triggers	Physiological triggers • Sleep deprivation • Missed medications • Flashing lights (photosensitive) • Hormonal changes	Psychological/emotional triggers • Stress, anxiety • Interpersonal conflict • Medical settings • Traumatic memories
EEG Findings	Abnormal electrical activity • Ictal epileptiform discharges • Post-ictal slowing • May have interictal spikes	No epileptic EEG correlate may be seen during a typical recorded event • Interpretation depends on event features • Seizure type and recording quality matter • Some epileptic seizures may lack a clear scalp EEG change
Post-ictal Period	Consistent confusion/fatigue • Confusion lasting minutes-hours • Post-ictal sleep • Gradual return to baseline	Rapid return to baseline • May appear alert immediately • Emotional distress • Variable recovery pattern
Injury Risk	Higher risk of injury • Tongue biting (sides) • Falls, burns • Sudden loss of control	Lower injury risk • Rarely bite tongue • May avoid harmful situations • Protective reflexes preserved

Important Note: These are general patterns, and individual cases can vary significantly. Some patients may have both PNES and epilepsy (dual diagnosis), which requires careful evaluation by an experienced specialist.

What is the Role of Video EEG in Diagnosing PNES?

Capturing a typical event on Video EEG monitoring is the reference standard for a documented PNES diagnosis. The video, scalp EEG, history and examination are interpreted together.

How Video EEG Works for PNES Diagnosis

Continuous monitoring: The duration is individualized according to the clinical question and frequency of events
Event capture: The team aims to record one or more events typical for the patient; the number needed varies
Real-time correlation: Clinical symptoms are directly correlated with EEG findings
Careful interpretation: PNES-experienced neurologists review all recordings

Video EEG at Our Clinic

Dr. Abhishek Gohel and Dr. Rutul Shah are NIMHANS-trained neurologists with epilepsy fellowship training. They assess suspected PNES and epilepsy and explain when Video EEG or other evaluation may be useful.

Learn more about Video EEG monitoring →

What Video EEG Shows in PNES

EEG correlation: No epileptic EEG correlate may be seen during a typical recorded event; specialist interpretation is required
Behavioral patterns: Specific movements and responses characteristic of PNES
Responsiveness testing: How patients respond to stimuli during episodes
Episode triggers: Psychological or emotional triggers captured on video

Why is PNES Often Misdiagnosed?

PNES misdiagnosis is unfortunately common, with several contributing factors:

Clinical Challenges

Symptom overlap: Many PNES episodes can look identical to epileptic seizures
Limited EEG availability: Standard EEGs often don't capture seizures
Patient history: Similar triggers and precipitating factors
Initial presentation: Emergency department doctors may not have specialized training

Systemic Issues

Specialist shortage: Limited access to epileptologists with PNES focus
Insurance barriers: Video EEG monitoring can be expensive
Stigma: Healthcare providers may not recognize PNES as a legitimate condition
Training gaps: Many neurologists have limited PNES experience

Consequences of Misdiagnosis

Inappropriate medications: Anti-seizure drugs don't help PNES and can cause side effects
Delayed proper treatment: Psychological interventions are postponed
Lifestyle restrictions: Unnecessary limitations on driving, work, activities
Worsening symptoms: Untreated underlying psychological factors continue
Financial burden: Expensive, ineffective treatments

How Does Treatment Differ for PNES vs Epilepsy?

The treatment approaches for PNES and epilepsy are fundamentally different, which is why accurate diagnosis is important.

Epilepsy Treatment

Anti-seizure medications (ASMs)
Lifestyle modifications (sleep, stress)
Seizure trigger avoidance
Surgical evaluation (if drug-resistant)
Regular neurological follow-up

🧘 PNES Treatment

Psychotherapy (CBT, trauma therapy)
Psychiatric evaluation and treatment
Stress management techniques
Gradual ASM withdrawal (if misdiagnosed)
Multidisciplinary care team

PNES Treatment Approach at Gujarat Epilepsy Clinic

Our complete PNES treatment program includes:

Diagnostic confirmation: Video EEG monitoring when needed
Patient education: Explaining PNES in a supportive, non-judgmental manner
Psychiatric referral: Connection with experienced mental health professionals
Medication review: Safe withdrawal of unnecessary anti-seizure medications
Family support: Education and counseling for family members
Regular follow-up: Monitoring progress and adjusting treatment plans

Effective PNES Therapies

Cognitive Behavioral Therapy (CBT): Most evidence-based treatment for PNES
Trauma-informed therapy: Addressing underlying psychological trauma
Mindfulness and stress reduction: MBSR, relaxation techniques
Family therapy: Improving communication and understanding
Psychiatric medication: For comorbid depression, anxiety, PTSD

How is PNES Stigma Addressed in India?

In India, both epilepsy and PNES carry significant social stigma, but PNES patients face additional challenges due to misconceptions about psychological conditions.

Cultural Considerations

Mental health stigma: Psychological conditions are often not recognized as "real" medical problems
Family dynamics: Extended family involvement can complicate treatment
Traditional beliefs: Seizures may be attributed to spiritual or supernatural causes
Gender factors: Women with PNES may face additional discrimination
Treatment accessibility: Limited mental health resources in many areas

Our Approach to Cultural Sensitivity

Respectful explanation: Using culturally appropriate language to explain PNES
Family involvement: Including family in education and treatment planning
Local resources: Connecting patients with nearby mental health professionals
Gradual approach: Taking time to build trust and understanding
Follow-up support: Regular check-ins to ensure treatment adherence

Reducing Stigma: At Gujarat Epilepsy & Neuro Clinic, we emphasize that both epilepsy and PNES are legitimate medical conditions requiring professional treatment. Our goal is to provide compassionate, evidence-based care that respects cultural values while promoting healing.

When Should You Suspect PNES?

Healthcare providers and patients should consider PNES evaluation when:

Poor response to anti-seizure medications despite adequate trials
Atypical seizure characteristics that don't fit standard epilepsy patterns
Psychological trauma history or significant stress
Comorbid psychiatric conditions (depression, anxiety, PTSD)
Seizures triggered by specific situations or emotional states
Normal EEGs despite frequent seizures
Prolonged recovery or immediate alertness post-episode

If you suspect PNES, referral to an epileptologist with PNES experience is important for proper evaluation and treatment planning.

Learn more about PNES symptoms and diagnosis →

Frequently Asked Questions

Yes. PNES and epilepsy can occur in the same person. Careful description and, when appropriate, recording of typical events may help the clinical team distinguish event types because each may need a different management plan.

PNES diagnosis can be delayed when events are treated as epilepsy without reassessing the history and typical episodes. Specialist review and appropriate investigation may help clarify the diagnosis and plan the next step.

While receiving the correct diagnosis is an important first step, PNES episodes typically don't stop immediately. Most patients require specialized psychotherapy, such as cognitive behavioral therapy (CBT), to address underlying psychological factors. With appropriate psychological and neurological care, many patients see meaningful improvement in event frequency and quality of life over time.

Anti-seizure medications don't directly treat PNES episodes since they're not caused by abnormal brain electrical activity. However, if a patient has comorbid psychiatric conditions like depression, anxiety, or PTSD, appropriate psychiatric medications can be very helpful as part of complete treatment. The primary treatment remains psychotherapy targeting the underlying psychological factors.

Explaining PNES to family can be challenging but is important for support and understanding. Emphasize that PNES is a legitimate medical condition, not something you're doing voluntarily or "faking." The episodes are real and distressing. Compare it to other stress-related medical conditions like panic attacks or irritable bowel syndrome. Consider including family members in educational sessions with your healthcare team to improve understanding and reduce stigma.

PNES Diagnosis and Treatment in Gujarat

Dr. Abhishek Gohel and Dr. Rutul Shah provide assessment and individualized care planning for suspected PNES and epilepsy.

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References

LaFrance WC Jr, et al. Minimum requirements for the diagnosis of psychogenic nonepileptic seizures. Epilepsia. 2013;54(11):2005-18. PubMed
Asadi-Pooya AA, Sperling MR. Epidemiology of psychogenic nonepileptic seizures. Epilepsy Behav. 2015;46:60-65. PubMed
Goldstein LH, et al. Cognitive behavioural therapy vs standardised medical care for adults with PNES (CODES). Lancet Psychiatry. 2020;7(6):491-505. PubMed

PNES vs Epilepsy: How Doctors Tell the Difference