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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 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 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...

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...

Inborn Errors of Metabolism

Inborn Errors of Metabolism

Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...

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

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

Published on: September 20, 2024

Malignant migrating partial seizures in infancy.

Giangennaro Coppola¹

¹Child Neuropsychiatry Clinic, Medical School, University of Salerno, Salerno, Italy.

Handbook of Clinical Neurology

|April 30, 2013

Summary

This summary is machine-generated.

Malignant migrating partial seizures in infancy (MMPSI) presents in early life with continuous seizures and developmental decline. While often drug-resistant, some treatments show limited efficacy for this severe childhood epilepsy syndrome.

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Published on: August 16, 2024

Area of Science:

Epileptology
Pediatric Neurology
Clinical Neuroscience

Background:

Malignant migrating partial seizures in infancy (MMPSI) is a rare childhood epilepsy syndrome.
Characterized by early onset seizures, developmental regression, and neurological deficits.
Currently under consideration for inclusion in the ILAE classification of epilepsy syndromes.

Purpose of the Study:

To describe the clinical features, EEG findings, and neurodevelopmental trajectory of MMPSI.
To review current understanding of the etiology and potential genetic underpinnings.
To summarize treatment strategies and their outcomes.

Main Methods:

Clinical case series and literature review.
Analysis of seizure semiology, EEG characteristics, and neurodevelopmental assessments.
Review of neuroradiological, biochemical, and genetic investigations.

Main Results:

Seizure onset within the first six months of life with migrating focal seizures and multifocal EEG discharges.
Progressive psychomotor deterioration, acquired microcephaly, hypotonia, and pyramidal/extrapyramidal signs.
Unknown etiology, with suspected genetic basis (e.g., channelopathy); marked drug resistance.

Conclusions:

MMPSI is a severe epileptic encephalopathy with poor prognosis.
Limited treatment responses observed with bromide, stiripentol, clonazepam, and levetiracetam.
Further research into genetic etiology is warranted for targeted therapies.