Quasi‑epileptic Seizures – A Comprehensive Medical Guide

Overview

Quasi‑epileptic seizures (QES), also called psychogenic non‑epileptic seizures (PNES), are episodes that resemble epileptic seizures but are not caused by abnormal electrical activity in the brain. Instead, they arise from psychological factors, often as a physical expression of emotional distress, trauma, or other mental‑health conditions.

Key points:

• QES can affect people of any age, but most studies report a higher prevalence in adolescents and young adults, particularly women (≈70 % of cases).
• The estimated prevalence in the general population ranges from 2 to 33 per 100,000, while up to 10 % of patients referred to epilepsy clinics are later diagnosed with QES (Mayo Clinic; WHO, 2022).
• Because QES mimics epilepsy, misdiagnosis is common; an average diagnostic delay of 5–7 years has been reported (Cleveland Clinic, 2023).

Symptoms

QES can present with a wide variety of motor, sensory, and autonomic features. The following list captures the most frequently reported signs, along with brief explanations.

Motor manifestations

• Stiffening or limpness – limbs may become rigid or floppy without the rhythmic jerking typical of tonic‑clonic epilepsy.
• Asynchronous jerking – movements often occur at different times on each side of the body, unlike the synchronous convulsions of true seizures.
• Side‑to‑side swaying or rocking – especially in children, a “hypnic” or “dancing” motion may be seen.
• Head shaking or shaking of the torso – may resemble a “head drop” seizure but lacks post‑ictal confusion.
• Pelvic thrusting or pelvic thrusting – observed more often in women and may be associated with sexual or trauma‑related triggers.

Sensory & autonomic features

• Amnesia for the event – many patients do not recall the seizure, similar to epilepsy, but may report “blanking out.”
• Perceived aura – feelings of anxiety, nausea, or a “rising sensation” may precede the episode.
• Heart rate changes – tachycardia or palpitations can occur, but they are usually less pronounced than in epileptic seizures.
• Skin flushing or pallor – due to sympathetic activation.

Behavioral clues that suggest QES rather than epilepsy

• Seizure provoked by emotional stress, pain, or witnessing an event.
• Longer duration (>2–3 minutes) or very short “seizures” (<10 seconds) with rapid recovery.
• Resistance to typical anti‑epileptic drugs (AEDs).
• Eyes remain open or show purposeful tracking during the event.
• Markedly variable seizure semiology from one episode to the next.

Causes and Risk Factors

QES is not caused by a direct neurological lesion; instead, it reflects complex interactions between the brain, mind, and environment.

Psychological origins

• Trauma and abuse – a history of physical, sexual, or emotional abuse is reported in up to 60 % of adult patients (NIH, 2021).
• Post‑traumatic stress disorder (PTSD) – hyper‑arousal and dissociative symptoms can manifest as QES.
• Depression and anxiety disorders – chronic stress may trigger conversion‑type responses.
• Somatic symptom disorder – excessive focus on bodily sensations.

Biological contributors

• Abnormalities in brain networks that process emotion (e.g., the limbic system) have been observed on functional MRI, though not structural lesions.
• Genetic predisposition to conversion disorders is not well‑defined, but family history of psychiatric illness increases risk.

Social and demographic risk factors

• Female gender (≈2–3 : 1 ratio).
• Adolescence and early adulthood – times of heightened emotional turbulence.
• Low socioeconomic status or limited access to mental‑health care.
• Previous diagnosis of epilepsy (misdiagnosed) – may reinforce the seizure pattern.

Diagnosis

Accurate diagnosis hinges on distinguishing QES from epileptic seizures, a process that usually involves several steps.

Clinical Evaluation

• Detailed history – triggers, preceding emotions, description of the event by the patient and witnesses, medication response.
• Physical & neurological exam – typically normal between episodes; any focal deficits suggest an alternative diagnosis.

Electroencephalography (EEG)

Video‑EEG monitoring is the gold standard. During a recorded event, the EEG will show no ictal epileptiform activity (i.e., normal background rhythm), confirming a non‑epileptic origin. Sensitivity is ~80 % and specificity >95 % (American Academy of Neurology, 2022).

Neuroimaging

• MRI of the brain – performed to rule out structural lesions that could cause seizures (tumors, cortical dysplasia).
• Functional imaging (fMRI, PET) – research tools; not routinely required for clinical diagnosis.

Psychiatric Assessment

A qualified mental‑health professional conducts screening for trauma, depression, anxiety, and other conversion‑disorder criteria (DSM‑5). Structured interviews such as the MINI or SCID are useful.

Differential Diagnosis

• Epileptic seizures (partial, generalized).
• Syncope, cardiac arrhythmias.
• Movement disorders (e.g., dystonia).
• Sleep‑related phenomena (e.g., parasomnias).

Treatment Options

Management of QES requires a multidisciplinary approach that addresses both the physical manifestations and the underlying psychological drivers.

Psychotherapy

• Cognitive‑Behavioral Therapy (CBT) – first‑line; helps patients identify triggers, develop coping strategies, and reduce seizure frequency. Meta‑analyses report a 30–50 % reduction in QES episodes (Cochrane Review, 2023).
• Trauma‑focused therapies – EMDR (Eye Movement Desensitization and Reprocessing) or prolonged exposure for patients with a history of abuse.
• Dialectical Behavior Therapy (DBT) – useful when comorbid borderline personality disorder or intense emotional dysregulation is present.

Medication

• Anti‑epileptic drugs (AEDs) are generally ineffective for QES and are tapered under neurologist supervision once the diagnosis is confirmed.
• Psychotropic medications may be indicated:
  • SSRIs (e.g., sertraline) for depression/anxiety.
  • SNRIs (e.g., venlafaxine) when pain‑related trauma contributes.
  • A low‑dose atypical antipsychotic (e.g., quetiapine) for severe agitation or insomnia.
• Medication is adjunctive; it does NOT replace psychotherapy.

Education & Collaborative Care

Providing clear explanations to the patient (and family) about the nature of QES reduces stigma and improves adherence. Coordination between neurologists, psychiatrists/psychologists, primary‑care physicians, and social workers is essential.

Rehabilitation & Adjunct Therapies

• Physical therapy – for patients who develop deconditioning after frequent seizures.
• Occupational therapy – helps resume work or school responsibilities.
• Mindfulness‑based stress reduction (MBSR) – decreases overall stress load.

Living with Quasi‑epileptic Seizures

Adapting daily life can empower patients and reduce seizure frequency.

Practical Tips

• Maintain a seizure diary – record date, time, triggers, duration, and emotional state.
• Identify and avoid personal triggers – stressful situations, caffeine excess, sleep deprivation.
• Establish a regular sleep‑wake schedule – 7–9 hours of quality sleep improves emotional regulation.
• Practice relaxation techniques – deep‑breathing, progressive muscle relaxation, guided imagery.
• Stay physically active – moderate aerobic exercise (e.g., walking, cycling) 150 minutes per week reduces anxiety.
• Build a support network – trusted friends, support groups for PNES, or online communities (e.g., Epilepsy Foundation’s “Living With PNES”).

Work & School Considerations

• Discuss reasonable accommodations with employers or educators (e.g., flexible deadlines, a quiet space for relaxation).
• Provide a brief medical note explaining the condition without disclosing sensitive psychiatric details unless the patient chooses to.

Driving

Driving restrictions vary by jurisdiction. In most U.S. states, patients with a confirmed QES diagnosis can drive once cleared by a neurologist or a physician with expertise in seizures, provided they are seizure‑free for a defined period (often 1–3 months). Check local laws.

Prevention

Because QES stems from psychological stressors, primary prevention focuses on early identification of mental‑health concerns.

• Screen for trauma, depression, and anxiety in primary‑care and pediatric settings.
• Promote resilience‑building programs in schools (social‑emotional learning curricula).
• Facilitate timely access to mental‑health services, especially for high‑risk groups (adolescents, survivors of abuse).
• Encourage healthy lifestyle habits—regular sleep, balanced nutrition, and physical activity—to lower overall stress.

Complications

If left untreated, QES can lead to significant morbidity.

• Functional impairment – frequent episodes may cause missed work/school, loss of income, and decreased quality of life.
• Inappropriate medication exposure – unnecessary AEDs carry side‑effects (bone loss, cognitive dulling, rash).
• Social stigma – misconceptions that seizures are “faked” can strain relationships.
• Psychiatric comorbidity escalation – untreated depression or PTSD can progress to substance abuse or suicidal ideation.
• Physical injury – falls or self‑harm during a seizure episode.

When to Seek Emergency Care

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Sources: Mayo Clinic, CDC, NIH National Institute of Neurological Disorders and Stroke, WHO, Cleveland Clinic, American Academy of Neurology practice guideline (2022), Cochrane Review on psychogenic non‑epileptic seizures (2023), DSM‑5 (APA, 2022).