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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,...
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:
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 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: 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 17, 2026

Generation and On-Demand Initiation of Acute Ictal Activity in Rodent and Human Tissue
06:45

Generation and On-Demand Initiation of Acute Ictal Activity in Rodent and Human Tissue

Published on: January 19, 2019

Concepts of epilepsy.

J Engel1

  • 1Department of Neurology and Anatomy, UCLA School of Medicine, Los Angeles, California, USA.

Epilepsia
|October 13, 2012
PubMed
Summary

Epilepsy is a group of disorders defined by recurrent seizures. Understanding the causes, clinical expressions, and specific syndromes is crucial for accurate diagnosis and effective treatment strategies.

Area of Science:

  • Neurology
  • Clinical Neuroscience
  • Genetics

Background:

  • Epilepsy is characterized by recurrent epileptic seizures, necessitating differentiation from other paroxysmal disorders.
  • Diagnosis requires distinguishing true epileptic seizures from those secondary to noxious insults.
  • Epilepsy arises from genetic or acquired factors influencing susceptibility and epileptogenesis.

Purpose of the Study:

  • To elucidate the complex nature of epilepsy, encompassing its diagnosis, underlying mechanisms, and classification.
  • To highlight the importance of accurate differential diagnosis in identifying epilepsy.
  • To underscore the role of syndromic classification in guiding treatment and prognosis.

Main Methods:

  • Review of diagnostic criteria for epilepsy and differentiation from mimics.

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Recording and Modulation of Epileptiform Activity in Rodent Brain Slices Coupled to Microelectrode Arrays
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Recording and Modulation of Epileptiform Activity in Rodent Brain Slices Coupled to Microelectrode Arrays

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Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
09:32

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients

Published on: December 18, 2016

Related Experiment Videos

Last Updated: May 17, 2026

Generation and On-Demand Initiation of Acute Ictal Activity in Rodent and Human Tissue
06:45

Generation and On-Demand Initiation of Acute Ictal Activity in Rodent and Human Tissue

Published on: January 19, 2019

Recording and Modulation of Epileptiform Activity in Rodent Brain Slices Coupled to Microelectrode Arrays
10:24

Recording and Modulation of Epileptiform Activity in Rodent Brain Slices Coupled to Microelectrode Arrays

Published on: May 15, 2018

Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients
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Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients

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  • Analysis of contributing factors to epilepsy, including genetic and acquired predispositions.
  • Examination of clinical expressions, underlying mechanisms (excitatory/inhibitory balance), and syndromic definitions.

    • Main Results:

    • Epileptic seizures result from cerebral disturbances affecting excitatory and inhibitory influences, leading to hyperexcitability or hypersynchronization.
    • Syndromic classification provides critical insights into management and prognosis, particularly for surgically remediable epilepsy.
    • Ongoing research into molecular genetics and pathophysiology aims to reclassify epileptic syndromes as distinct diseases.

    Conclusions:

    • Accurate diagnosis of epilepsy requires careful exclusion of other conditions and understanding of contributing factors.
    • Syndromic classification is vital for personalized treatment and predicting outcomes in epilepsy.
    • Future research holds the potential to redefine epilepsy classification based on definitive biological substrates.