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Epilepsy ll: Types

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: Classification

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 and Seizures: Overview

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: Introduction

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: Types

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...

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Related Experiment Video

Updated: Apr 25, 2026

Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization

Author Spotlight: Advancing Pediatric Epilepsy Surgery in Children Through Novel Biomarkers and Enhanced Localization

Published on: September 20, 2024

Intractable epilepsy, hemispheric malformation, and generalized electroencephalography abnormalities.

Leeda Ahmadi¹, Elaine Wirrell¹

¹Divisions of Child and Adolescent Neurology and Epilepsy, Mayo Clinic, Rochester, MN.

Seminars in Pediatric Neurology

|August 24, 2014

Summary

This summary is machine-generated.

A young boy with severe brain abnormalities and intractable epilepsy became seizure-free after a functional hemispherectomy. This epilepsy surgery also led to significant cognitive improvements.

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Area of Science:

Neuroscience
Pediatric Neurology
Epileptology

Background:

Intractable epilepsy in children poses significant challenges.
Large hemispheric dysplasia can lead to severe neurological deficits.
Functional hemispherectomy is a surgical option for refractory epilepsy.

Observation:

A pediatric patient presented with large hemispheric dysplasia.
The patient exhibited generalized electroencephalogram (EEG) abnormalities.
The epilepsy was intractable to medical management.

Findings:

The patient underwent a functional hemispherectomy.
Seizure freedom was achieved post-operatively.
Marked improvement in cognitive outcome was observed.

Implications:

Functional hemispherectomy can be an effective treatment for severe hemispheric dysplasia and intractable epilepsy in children.
This surgical intervention can lead to favorable neurological and cognitive outcomes.
Case reports like this contribute to understanding surgical epilepsy treatments.