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Related Concept Videos

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...
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:
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...
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 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 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.

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Updated: Jul 7, 2026

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex
09:00

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex

Published on: April 15, 2015

Focal seizures and EEG: prognostic considerations.

John R Hughes1, John J Fino

  • 1Laboratory of Clinical Neurophysiology, Department of Neurology, University of Illinois Medical Center, M/C 796, 912 S. Wood St., Chicago, IL 60612, USA.

Clinical EEG (Electroencephalography)
|October 17, 2003
PubMed
Summary

Electroencephalography (EEG) can predict epilepsy control. Early EEG findings, like spike presence and frequency, help identify patients likely to remain uncontrolled, enabling timely interventions.

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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
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Area of Science:

  • Neurology
  • Clinical Neurophysiology

Background:

  • Epilepsy management relies on predicting seizure control.
  • Focal epilepsy patients often face long-term challenges with seizure activity.
  • Early prediction of treatment outcomes is crucial for patient management.

Purpose of the Study:

  • To evaluate the predictive capability of electroencephalography (EEG) for seizure control in focal epilepsy.
  • To differentiate between eventually uncontrolled (U) and controlled (C) focal epilepsy patients using EEG data.

Main Methods:

  • Retrospective analysis of 1474 electroencephalograms (EEGs) from 300 focal epilepsy patients (150 U, 150 C).
  • Exclusion of generalized epilepsy and benign childhood epilepsy cases.
  • Analysis focused on age, focal spikes, and focal slow waves in relation to seizure control status.

Main Results:

  • Patients aged 5-18 were more often controlled (C), while those aged 21-48 were more often uncontrolled (U).
  • Focal spikes and slow waves were significantly more prevalent in uncontrolled (U) patients.
  • Absence or rarity of spikes on early EEGs predicted control (C) in two-thirds of cases; frequent spikes predicted poor control (U) in 84%.

Conclusions:

  • Early EEG findings, particularly spike patterns on the first or second EEG, can effectively predict long-term seizure control in focal epilepsy.
  • Predictive EEG analysis allows for earlier intervention in potentially uncontrolled cases, preventing condition deterioration.
  • Quantified EEG data, including sleep records, offers a more timely prediction of epilepsy outcomes compared to clinical data alone.