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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,...

Genomic Imprinting and Inheritance

Genomic Imprinting and Inheritance

Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...

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: May 13, 2026

A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations

A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations

Published on: December 1, 2017

Generalized epilepsy in two patients with 5p duplication.

Gerhard Kluger¹, Udo Koehler, Teresa M Neuhann

¹Schön Klinik Vogtareuth, Hospital for Neuropediatrics and Neurological Rehabilitation, Epilepsy Center for Children and Adolescents, Vogtareuth, Germany.

Neuropediatrics

|March 14, 2013

Summary

Microduplications in chromosome 5p are linked to generalized epilepsies in children. Further research is needed to pinpoint the specific epilepsy susceptibility locus at 5p13.1.

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A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations

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Published on: September 20, 2024

Area of Science:

Genetics
Neurology
Epilepsy Research

Background:

Limited data exists on chromosome 5 short arm duplications and their association with epilepsy.
Understanding genetic factors in epilepsy is crucial for diagnosis and treatment.

Observation:

Two pediatric patients presented with generalized epilepsies and developmental delay.
Array comparative genomic hybridization identified distinct microduplications on chromosome 5 short arm (5p).
Both patients had normal brain magnetic resonance imaging results.

Findings:

The study identified a potential epilepsy susceptibility locus at chromosome band 5p13.1.
The overlapping duplicated region includes four genes: RICTOR, FYB, C9, and DAB2.
One patient had a de novo larger duplication with dysmorphic features and photosensitivity, while the other inherited a smaller duplication paternally.

Implications:

This research highlights chromosome 5p microduplications as a potential cause of epilepsy.
Further investigation into the 5p13.1 region may lead to improved genetic diagnostics for epilepsy.
Identifying specific genes involved could pave the way for targeted therapeutic strategies.