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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:
Diencephalon: Anatomical Regions01:30

Diencephalon: Anatomical Regions

The diencephalon, etymologically translated as 'through brain,' plays an integral role as the conduit between the cerebrum and the vast extent of the nervous system. However, the olfactory system is an exception, as it interfaces directly with the cerebrum. The diencephalon, deeply ensconced beneath the cerebrum, primarily consists of three paired structures — the thalamus, hypothalamus, and epithelamus. It also includes accessory structures such as the subthalamus, which houses the subthalamic...

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Related Experiment Video

Updated: Jul 5, 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

[Epilepsy and insula].

M Guenot1, J Isnard

  • 1Service de neurochirurgie et stéréotaxie fonctionnelles, hospices civils de Lyon, université Claude-Bernard-Lyon-I, Lyon, France. marc.guenot@chu-lyon.fr

Neuro-Chirurgie
|April 18, 2008
PubMed
Summary
This summary is machine-generated.

The insula, a deep brain structure, plays a role in bodily sensations and epilepsy. New research explores less invasive surgical options for insular cortex seizures.

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Area of Science:

  • Neuroanatomy: Detailed description of the insula's location, morphology, and vascular supply.
  • Neurophysiology: Functional roles in autonomic control, somatosensation, and nociception.

Context:

  • The insula is a deep brain structure, difficult to access surgically.
  • Its role in epilepsy, particularly seizure origin and semiology, is increasingly recognized.

Purpose:

  • To review the anatomical and functional aspects of the insula.
  • To discuss the insula's involvement in epilepsy and current surgical approaches.
  • To highlight the investigation of minimally invasive procedures for insular seizures.

Summary:

  • The insula, concealed within the brain, is vital for autonomic and sensory processing, including pain.
  • Stereoelectroencephalography (SEEG) reveals insular seizures present unique symptoms and can originate independently or spread from temporal lobes.
  • Surgical interventions for insular epilepsy are challenging, prompting interest in less invasive techniques like radiofrequency thermolesions.

Impact:

  • Advances understanding of insular cortex function and its role in neurological disorders.
  • Informs the development of novel and safer surgical strategies for epilepsy treatment.
  • Provides a basis for future research into the insula's complex contributions to human experience and disease.