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Epilepsy and Seizures

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Epilepsy and Seizures

Epilepsy is a chronic neurological condition characterized by a predisposition to recurrent, unprovoked seizures. A seizure occurs when abnormal electrical activity spreads through networks in the brain, disrupting awareness, movement, sensation, or behavior. While seizures can be frightening and disrupt daily life, modern treatments—including medication, surgery, neuromodulation, dietary therapies, and precision diagnostics—allow most individuals to achieve meaningful seizure control.
Epilepsy is not a single disease. It is a spectrum of disorders with diverse causes: genetics, structural brain lesions, autoimmune disease, metabolic disturbances, trauma, infection, or developmental abnormalities. Identifying the correct seizure type and underlying mechanism is essential for choosing the right therapy.
This Condition Center provides a comprehensive overview of epilepsy and seizure disorders, empowering individuals and families to understand the condition, advocate for targeted evaluation, and participate actively in their treatment plan.

Questions to Ask Your Doctor

• What type of seizures do I have, and what part of the brain do they come from?
• What tests (EEG, MRI, blood work, genetic testing) are needed to clarify the cause?
• Could this be an autoimmune, metabolic, traumatic, or genetic epilepsy?
• How do the treatments differ for focal versus generalized epilepsy?
• What are the medication options, side effects, and expected benefits?
• If medications do not control my seizures, what are the next steps?
• Am I a candidate for epilepsy surgery or neuromodulation (VNS, RNS, DBS)?
• Should I follow seizure safety guidelines regarding driving, work, or physical activity?
• How do sleep, stress, hydration, and metabolic factors influence my seizures?
• What warning signs should prompt urgent evaluation?
• How do we track my response to treatment over time?

Overview

Epilepsy affects people of all ages and is one of the most common serious neurological conditions. It is defined by:

  1. Two or more unprovoked seizures, or
  2. One unprovoked seizure with a high risk of recurrence, or
  3. A known epilepsy syndrome, even after a single seizure.

Seizures arise when networks in the brain become hyperexcitable and fire abnormally. Depending on where the abnormal electrical activity begins and how far it spreads, seizures can cause:

• Loss of awareness
• Convulsions
• Staring episodes
• Language interruption
• Behavioral changes
• Sensory disturbances
• Autonomic symptoms

Although epilepsy can be lifelong, many individuals achieve complete seizure freedom with appropriate therapy and monitoring.

Types of Seizures

Seizures are categorized into focal, generalized, and unknown onset.

1. Focal Seizures (Start in One Region of the Brain)

Symptoms depend on the area affected:

• Staring or unresponsiveness
• Repetitive movements (lip-smacking, picking)
• Fear, déjà vu, strange smells or tastes
• Tingling or twitching in one part of the body
• Speech arrest
• Autonomic symptoms (nausea, flushing, heart racing)

Focal seizures may spread to cause bilateral convulsions.

2. Generalized Seizures (Involve Both Hemispheres from Onset)

• Absence seizures – brief staring spells
• Myoclonic seizures – quick muscle jerks
• Tonic seizures – stiffening
• Atonic seizures – sudden loss of tone (“drop attacks”)
• Generalized tonic–clonic seizures – convulsions with loss of consciousness

3. Unknown-Onset Seizures

Used when the beginning of the event is not observed.

What Causes Epilepsy?

Epilepsy has many causes, but they fall into identifiable categories:

1. Structural brain abnormalities

• Stroke
• Tumors
• Traumatic brain injury
• Cortical malformations
• Scarring from past infections or trauma

2. Genetic epilepsies

Channelopathies and inherited syndromes.

3. Autoimmune epilepsy

Antibody-mediated disruptions of neural networks (e.g., anti-NMDA receptor).

4. Metabolic and mitochondrial disorders

5. Infectious triggers

Meningitis, encephalitis, neurocysticercosis.

6. Post-COVID or post-viral inflammatory changes

Neuro-PASC can occasionally present with seizures.

7. Unknown (idiopathic)

In many patients no clear cause is found, yet treatment remains effective.

Early Recognition Matters

Timely diagnosis helps:

• Reduce seizure-related injuries
• Improve quality of life
• Prevent status epilepticus (prolonged seizures)
• Allow earlier referral to epilepsy specialists or surgical centers
• Identify treatable causes (autoimmune, metabolic, structural)

Seek urgent evaluation for:

• First-ever seizure
• Seizures lasting more than 5 minutes
• Repeated seizures without recovery
• New weakness, fever, or injury after a seizure
• Seizures in pregnancy
• Sudden behavioral changes with confusion (possible autoimmune encephalitis)

Signs and Symptoms

Seizures can cause diverse symptoms:

Awareness Changes

• Staring
• Confusion
• Memory gaps
• Loss of consciousness

Motor Symptoms

• Rhythmic jerking
• Stiffening
• Sudden collapse
• Repetitive movements

Sensory Symptoms

• Tingling
• Visual flashes
• Sounds or smells that aren’t present
• Rising sensation in stomach

Autonomic Symptoms

• Pale or flushed appearance
• Fast heartbeat
• Nausea

Cognitive or Emotional Symptoms

• Fear or panic
• Déjà vu
• Difficulty speaking

Exams and Tests

A comprehensive evaluation identifies seizure type, cause, and optimal treatment.

1. Electroencephalogram (EEG)

• Detects abnormal electrical activity
• Identifies seizure focus
• Helps categorize generalized vs focal epilepsy

Sleep-deprived or extended EEG improves detection.

2. Video-EEG Monitoring

Used for:
• Unclear seizure types
• Surgical evaluation
• Differentiating epilepsy from non-epileptic events

3. Brain Imaging

MRI with epilepsy protocol is essential.
Identifies lesions such as:

• Tumors
• Cortical dysplasia
• Stroke
• Scarring
• Vascular malformations

4. Laboratory Testing

Looks for metabolic, autoimmune, or genetic contributors:

• CMP, CBC
• Sodium, calcium, magnesium
• Liver/kidney tests (medication monitoring)
• Thyroid function
• Autoimmune antibody panels
• Genetic testing (when indicated)

5. Additional Testing (Case-Dependent)

• Lumbar puncture (if infection suspected)
• PET or SPECT scans (for pre-surgical evaluation)
• Neuropsychological testing (memory, language mapping)

Treatment

Treatment is individualized based on seizure type, cause, age, comorbidities, and patient preference.

1. Anti-Seizure Medications (ASMs)

First-line therapy for most individuals.

Common ASMs include:
• Levetiracetam
• Lamotrigine
• Valproic acid
• Topiramate
• Lacosamide
• Oxcarbazepine
• Zonisamide

Medication choice depends on seizure type and side-effect profile.

2. Epilepsy Surgery

Considered when:

• Seizures originate from one region
• That region can be safely removed
• Medications fail (drug-resistant epilepsy)

Surgery can be curative in the right patient.

3. Neuromodulation Therapies

For individuals who are not surgical candidates:

• Vagus Nerve Stimulation (VNS)
• Responsive Neurostimulation (RNS)
• Deep Brain Stimulation (DBS)

These treatments reduce seizure frequency and improve quality of life.

4. Dietary Therapy

Especially useful in children and selected adults:

• Ketogenic diet
• Modified Atkins diet

Can reduce seizure frequency substantially.

5. Autoimmune or Metabolic Epilepsy Treatments

• Immunotherapy: IVIG, steroids, plasma exchange
• Targeted metabolic supplementation
• Gene-directed therapies (in select syndromes)

6. Lifestyle & Safety Planning

• Adequate sleep
• Avoiding alcohol and recreational drugs
• Hydration and stress reduction
• Avoiding seizure triggers
• Counseling on driving laws
• Workplace and safety planning
• Seizure action plan for emergencies

Living With Epilepsy

With modern care:

• More than two-thirds of individuals achieve seizure freedom
• Most live full, active, productive lives
• Medical, surgical, and neuromodulation options continue to expand
• Psychological and social support improves outcomes

Epilepsy is a treatable, often highly manageable condition when care is proactive and personalized.

Did You Know?

• 1 in 26 people will develop epilepsy in their lifetime.
• Sleep deprivation is one of the most powerful seizure triggers.
• Epilepsy surgery has a higher cure rate than many medical treatments yet is underutilized.
• Many genetic epilepsies respond to specific medications or diets.
• Autoimmune epilepsy is one of the most rapidly expanding diagnostic categories.

References & Public Resources

  1. Fisher RS, Cross JH, French JA, et al. Operational Classification of Seizure Types by the International League Against Epilepsy: Position Paper of the ILAE Commission for Classification and Terminology. Epilepsia. 2017;58(4):522-530.[1]
  2. Beniczky S, Trinka E, Wirrell E, et al. Updated Classification of Epileptic Seizures: Position Paper of the International League Against Epilepsy. Epilepsia. 2025;66(6):1804-1823.[2]
  3. Asadi-Pooya AA, Brigo F, Lattanzi S, Blumcke I. Adult Epilepsy. Lancet. 2023;402(10399):412-424.[3]
  4. Pellinen J, Foster EC, Wilmshurst JM, et al. Improving Epilepsy Diagnosis Across the Lifespan: Approaches and Innovations. Lancet Neurol. 2024;23(5):511-521.[4]
  5. Kanner AM, Bicchi MM. Antiseizure Medications for Adults With Epilepsy: A Review. JAMA. 2022;327(13):1269-1281.[5]
  6. Menon RN, Helen Cross J. Childhood Epilepsy. Lancet. 2025;406(10503):636-649.[6]
  7. Jobst BC, Cascino GD. Resective Epilepsy Surgery for Drug-Resistant Focal Epilepsy: A Review. JAMA. 2015;313(3):285-93.[7]
  8. Thijs RD, Surges R, O'Brien TJ, Sander JW. Epilepsy in Adults. Lancet. 2019;393(10172):689-701.[8]
  9. Ryvlin P, Rheims S, Hirsch LJ, et al. Neuromodulation in Epilepsy: State-of-the-Art Approved Therapies. Lancet Neurol. 2021;20(12):1038-1047.[9]
  10. Touma L, Dansereau B, Chan AY, et al. Neurostimulation in People With Drug-Resistant Epilepsy: Systematic Review and Meta-Analysis From the ILAE Surgical Therapies Commission. Epilepsia. 2022;63(6):1314-1329.[10]
Source: https://www.premierneurohealth.com/