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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: 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:

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,...

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.

Antiepileptic Drugs: Sodium Channel Blockers

Antiepileptic Drugs: Sodium Channel Blockers

Antiepileptic drugs are specialized medications that prevent seizures in individuals diagnosed with epilepsy. These drugs primarily function by blocking the movement of sodium ions through channels in the neuronal membrane, inhibiting the repetitive firing of action potentials often associated with seizures.
Sodium channel blockers modulate ion channels, particularly voltage-gated sodium channels. They block only sodium ion movement.
Among the most commonly prescribed antiepileptic drugs are...

Antiepileptic Drugs: Potassium Channel Activators

Antiepileptic Drugs: Potassium Channel Activators

Ezocgabine or retigabine, an antiepileptic drug of remarkable efficacy, has revolutionized the management of seizures. It is a potassium channel activator, explicitly targeting the family of Q subtype potassium channels. It enhances the transmembrane potassium currents, regulating neuronal excitability. This action stabilizes the resting membrane potential, a pivotal factor in mitigating the hyperexcitability that characterizes epilepsy.
Ezogabine has gained approval as an adjunctive treatment...

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Related Experiment Video

Updated: Jun 11, 2026

Continuous Video Electroencephalogram during Hypoxia-Ischemia in Neonatal Mice

Continuous Video Electroencephalogram during Hypoxia-Ischemia in Neonatal Mice

Published on: June 11, 2020

Sleep and epilepsy in neonates.

Magda Lahorgue Nunes¹, Jaderson Costa da Costa

¹Division of Neurology, Laboratory of Clinical Neurophysiology, Hospital São Lucas PUCRS, School of Medicine, Porto Alegre, RS, Brazil. nunes@pucrs.br

|July 13, 2010

Summary

This summary is machine-generated.

Neonatal seizures disrupt sleep patterns, potentially impacting brain development and neurological outcomes. Abnormal sleep organization in newborns with seizures is linked to poorer prognoses.

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Area of Science:

Neonatal neurology
Sleep medicine
Epileptology

Background:

The link between sleep and epilepsy is recognized in adults and children.
Understanding this relationship in neonates is crucial for early intervention.

Purpose of the Study:

To review the relationship between sleep and epilepsy in the neonatal period.
To explore how neonatal seizures affect sleep and vice versa.

Main Methods:

Literature review of the PubMed database.
Searched using keywords: "neonatal seizures" and "sleep".

Main Results:

Neonatal seizures frequently cause abnormal sleep regulation.
Altered sleep may stem from maladaptive neuronal network plasticity.
EEG abnormalities correlate with disrupted sleep organization.

Conclusions:

Cortical maturation and sleep-wake cycles are interconnected.
Disrupted sleep in neonatal seizures may indicate broader neurological dysfunction.
Undifferentiated sleep organization in seizure-affected newborns suggests a worse outcome.