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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...
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.
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...
Antiepileptic Drugs: GABAergic Pathway Potentiators01:18

Antiepileptic Drugs: GABAergic Pathway Potentiators

γ-aminobutyric acid or GABA, plays a pivotal role as an inhibitory neurotransmitter in the brain. GABA pathway potentiators, also known as GABAergic drugs, are a class of pharmaceutical agents designed to enhance the functioning of the GABAergic system. These medications primarily treat epilepsy, a neurological disorder characterized by recurrent seizures.
The key GABA pathway potentiators used in epilepsy management are as follows.
Benzodiazepines are a well-known class of drugs used for their...

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Related Experiment Video

Updated: May 18, 2026

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

Orbitofrontal and insular epilepsy.

Matthias F Kriegel1, David W Roberts, Barbara C Jobst

  • 1Department of Neurology, Dartmouth Medical School, Hanover, NH, USA.

Journal of Clinical Neurophysiology : Official Publication of the American Electroencephalographic Society
|October 3, 2012
PubMed
Summary
This summary is machine-generated.

Diagnosing orbitofrontal and insular epilepsy is challenging due to varied symptoms. Intracranial electroencephalograms (EEG) are crucial for identifying seizure origins in these complex epilepsy types.

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

Published on: December 6, 2016

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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
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Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
10:22

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

Published on: December 6, 2016

Area of Science:

  • Neurology
  • Epileptology
  • Neurosurgery

Background:

  • Orbitofrontal and insular epilepsy present diagnostic challenges due to variable clinical manifestations.
  • Surgical treatment for these epilepsy types is complex and requires precise localization.

Observation:

  • Orbitofrontal epilepsy seizures can mimic frontal or temporal lobe epilepsy based on seizure spread.
  • Insular epilepsy is characterized by throat constriction and unilateral paresthesias.
  • Functional imaging aids localization, but invasive monitoring is often necessary.

Findings:

  • Intracranial electroencephalograms (EEG) are the gold standard for pinpointing orbitofrontal seizure onset.
  • Identifying insular seizure onset requires direct exploration, though intracranial EEG is feasible and safe.
  • High-frequency oscillations, fMRI, and other advanced techniques require further validation.

Implications:

  • Accurate diagnosis of orbitofrontal and insular epilepsy relies heavily on intracranial EEG.
  • Further research into novel diagnostic tools is needed to improve localization and treatment planning.
  • Improved diagnostic accuracy can lead to better surgical outcomes for patients with refractory epilepsy.