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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 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 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...
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:
Electroconvulsive Therapy01:30

Electroconvulsive Therapy

Electroconvulsive therapy (ECT), or shock therapy, remains a critical biomedical intervention for severe, treatment-resistant depression. While its origins can be traced back to Hippocrates' observations that malaria-induced convulsions alleviated mental illness, modern ECT has evolved significantly from its earlier, more primitive applications. First introduced in 1938 by Ugo Cerletti and his colleagues, ECT involves inducing controlled seizures using electrical currents. In its early years,...

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Related Experiment Video

Updated: Jun 20, 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

[Insular epilepsy: The Montreal experience].

D K Nguyen1, W Surbeck, A G Weil

  • 1Service de neurologie, [corrected] hôpital Notre-Dame du Chum, université de Montréal, 1560, Sherbrooke Est, H2L 4M1, Montréal, [corrected] Canada. d.nguyen@umontreal.ca

Revue Neurologique
|September 8, 2009
PubMed
Summary

The insula plays a key role in refractory partial epilepsy, with its seizures often mimicking other epilepsy types. Recognizing and surgically treating insular epilepsy can improve surgical outcomes.

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Performing Behavioral Tasks in Subjects with Intracranial Electrodes
12:10

Performing Behavioral Tasks in Subjects with Intracranial Electrodes

Published on: October 2, 2014

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Last Updated: Jun 20, 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

Performing Behavioral Tasks in Subjects with Intracranial Electrodes
12:10

Performing Behavioral Tasks in Subjects with Intracranial Electrodes

Published on: October 2, 2014

Area of Science:

  • Neuroscience
  • Epileptology
  • Neurosurgery

Context:

  • Refractory partial epilepsy presents diagnostic challenges.
  • The insula's role in epilepsy is increasingly recognized.
  • Surgical treatment for epilepsy continues to advance.

Purpose:

  • To review recent data on the insula's role in refractory partial epilepsy.
  • To summarize clinical experience in insular epilepsy investigation and treatment.
  • To highlight the importance of insular cortical stimulation in diagnosis.

Summary:

  • Insular seizures exhibit diverse clinical manifestations, often mimicking temporal, frontal, or parietal lobe epilepsy.
  • Intracerebral electrode investigation of the insula is crucial for accurate diagnosis.
  • Failure to recognize insular seizures can lead to suboptimal epilepsy surgery outcomes.

Impact:

  • Lowering the threshold for insular exploration can improve epilepsy surgery success rates.
  • Advances in microneurosurgery facilitate safer and more effective insular resections.
  • Improved understanding and treatment of insular epilepsy can enhance patient quality of life.