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Related Concept Videos

Seizures l: Introduction01:20

Seizures l: Introduction

Understanding seizures and epilepsy relies on key definitions that help in recognizing, classifying, and managing these disorders. These definitions provide a framework for recognizing, classifying, and managing seizure disorders.DefinitionsA seizure is a sudden, abnormal burst of electrical activity in the brain that can cause changes in awareness, movement, sensation, or behavior, depending on the area involved. Epilepsy is a chronic condition characterized by recurrent, unprovoked seizures,...
Seizures: Classification01:13

Seizures: Classification

Epilepsy is primarily characterized by unpredictable seizures, either provoked by an identifiable factor, such as injury or illness, or unprovoked, occurring spontaneously without apparent cause.
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Seizures ll: Types01:19

Seizures ll: Types

Seizures are sudden bursts of abnormal electrical discharge in the brain that interfere with normal function. They are commonly divided into three groups: focal seizures, generalized seizures, and other types that do not fit neatly into either category.Focal SeizuresFocal seizures begin in a single brain region. When awareness is preserved, they are called focal aware seizures and may cause sensations such as tingling, unusual smells, or flashing lights. When awareness is impaired, they are...
Epilepsy and Seizures: Overview01:24

Epilepsy and Seizures: Overview

Epilepsy is a chronic neurological disease marked by recurrent, unpredictable seizures. These seizures are caused by abnormal electrical discharges in the brain, leading to behavior, sensation, or consciousness alterations. They can also cause transient impairment of awareness, interfering with daily activities.
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Epilepsy ll: Types01:22

Epilepsy ll: Types

Recurrent seizures, stemming from abnormal electrical activity in the brain, are the defining characteristic of epilepsy, a chronic neurological condition. Because seizure features vary greatly, epilepsy is classified using two systems: by seizure type and by epilepsy syndromes. These classifications enable clinicians to describe seizure patterns and select suitable treatment strategies.I. Classification by Seizure Type1. Focal EpilepsyFocal epilepsy begins in one hemisphere of the brain.
Antiepileptic Drugs: Potassium Channel Activators01:20

Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...

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Related Experiment Video

Updated: Jun 5, 2026

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
07:35

Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

Published on: July 8, 2025

Pseudoseizures: a real problem!

J A McSherry

    Canadian Family Physician Medecin De Famille Canadien
    |January 26, 2011
    PubMed
    Summary
    This summary is machine-generated.

    Not all seizures indicate epilepsy; non-epileptic seizures (pseudoseizures) are common in conversion disorders. Diagnosis requires careful evaluation, as pseudoseizures do not respond to anticonvulsant medication.

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    Last Updated: Jun 5, 2026

    Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale
    07:35

    Behavioral Characterization of Pentylenetetrazole-induced Seizures: Moving Beyond the Racine Scale

    Published on: July 8, 2025

    Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
    09:57

    Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

    Published on: September 20, 2024

    Area of Science:

    • Neurology
    • Psychiatry

    Background:

    • Recent advancements in anticonvulsant therapies and diagnostic tools have highlighted that seizures do not always equate to epilepsy.
    • Non-epileptic seizures (NES), also termed pseudoseizures, are observed in approximately 20% of patients with conversion syndromes.
    • These seizures present diagnostic and therapeutic challenges, often mimicking epileptic seizures.

    Purpose of the Study:

    • To differentiate between epileptic and non-epileptic seizures.
    • To emphasize the diagnostic difficulties and treatment implications of pseudoseizures.
    • To highlight the utility of video-electroencephalogram (EEG) monitoring in diagnosing pseudoseizures.

    Main Methods:

    • Review of clinical presentations and diagnostic criteria for non-epileptic seizures.
    • Emphasis on the role of simultaneous video-electroencephalogram (EEG) monitoring as the gold standard.
    • Discussion of patient response to anticonvulsant medications and potential toxic effects.

    Main Results:

    • Patients with pseudoseizures do not benefit from anticonvulsant treatments and may experience adverse effects.
    • Suspicion of pseudoseizures is warranted in cases of unpredictable seizure control, normal ictal or post-ictal EEG findings, and presence of psychopathology.
    • Video-EEG monitoring is crucial for accurate diagnosis, distinguishing pseudoseizures from epileptic seizures.

    Conclusions:

    • Accurate diagnosis of pseudoseizures is critical for appropriate patient management.
    • Video-EEG monitoring offers definitive diagnosis for pseudoseizures.
    • Understanding the distinction between epileptic and non-epileptic seizures improves patient outcomes.