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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 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...
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: Glutamate Antagonists01:14

Antiepileptic Drugs: Glutamate Antagonists

Glutamate is a fundamental neurotransmitter in the central nervous system, playing a vital role in neuronal communication and various cognitive processes. Glutamate stands as the principal excitatory neurotransmitter in the brain. Its presence is crucial for the communication between neurons, underpinning essential processes such as synaptic transmission, neuronal excitability, and plasticity. These functions are vital for higher-order cognitive processes, including learning and memory. The...

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Related Experiment Video

Updated: May 15, 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

Artifact-related epilepsy.

William O Tatum1

  • 1Department of Neurology, Mayo College of Medicine, Mayo Clinic, Jacksonville, FL, USA. Tatum.william@mayo.edu

Neurology
|December 26, 2012
PubMed
Summary
This summary is machine-generated.

Artifacts are common in electroencephalography (EEG) and can mimic epileptiform discharges (ED). Distinguishing these artifacts from true ED is crucial to avoid misdiagnosis and inappropriate treatment, especially with continuous EEG monitoring.

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Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement
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Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement

Published on: June 25, 2016

Related Experiment Videos

Last Updated: May 15, 2026

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

Published on: September 20, 2024

Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement
06:58

Non-restraining EEG Radiotelemetry: Epidural and Deep Intracerebral Stereotaxic EEG Electrode Placement

Published on: June 25, 2016

Area of Science:

  • Neuroscience
  • Clinical Electrophysiology

Background:

  • Artifacts are ubiquitous in electroencephalography (EEG) recordings.
  • These extracerebral potentials can be mistaken for epileptiform discharges (ED).
  • Continuous EEG monitoring reveals novel artifacts.

Purpose of the Study:

  • To highlight the challenge of differentiating artifacts from true epileptiform discharges (ED) in EEG.
  • To emphasize the importance of accurate interpretation in clinical practice.

Main Methods:

  • Review of EEG principles and common artifact sources.
  • Discussion of continuous EEG monitoring findings.
  • Integration of video-EEG for behavioral correlation.

Main Results:

  • Artifacts frequently mimic epileptiform discharges (ED), posing a diagnostic challenge.
  • Video-EEG correlation significantly improves the distinction between cerebral and extracerebral influences.
  • Human interpretation remains essential for accurate EEG analysis.

Conclusions:

  • Accurate differentiation of EEG artifacts from epileptiform discharges (ED) is critical for patient safety.
  • Misinterpretation can lead to unnecessary treatment and diagnostic harm.
  • Advanced techniques like video-EEG aid, but expert human analysis is indispensable.