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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...

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:

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,...

Disorders of the Nervous Tissue

Disorders of the Nervous Tissue

Nervous tissue is a vital component of the human body's communication system, enabling us to perceive and respond to stimuli. However, like all other tissues, it is vulnerable to disorders and diseases that can significantly impact our neurological functioning.
Homeostatic Imbalances:
Alzheimer's disease manifests as a gradual decline in memory and cognitive abilities, attributed to the buildup of amyloid plaques and neurofibrillary tangles in the brain.
Parkinson's disease arises from the...

Encephalitis l: Introduction

Encephalitis l: Introduction

Encephalitis is inflammation of the brain parenchyma, most often due to infections or autoimmune processes. It presents with neuropsychiatric features such as fever, altered mental status, behavioral changes, cognitive dysfunction, seizures, focal deficits, and sometimes autonomic instability. In some cases, the meninges are also involved, resulting in meningoencephalitis.Infectious CausesInfectious encephalitis is most commonly viral but can also result from bacterial, fungal, or parasitic...

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Updated: May 23, 2026

Identification and Classification of Position-specific GABAA Receptor Subunit Missense Variants for Their Role In Hippocampal Pyramidal Neurons

Identification and Classification of Position-specific GABA_A Receptor Subunit Missense Variants for Their Role In Hippocampal Pyramidal Neurons

Published on: June 6, 2025

Epilepsy as a neurodevelopmental disorder.

Yuri Bozzi¹, Simona Casarosa, Matteo Caleo

¹Laboratory of Molecular Neuropathology, Centre for Integrative Biology, University of Trento Trento, Italy.

Frontiers in Psychiatry

|March 30, 2012

Summary

This summary is machine-generated.

Developmental brain alterations, including malformations and synaptic defects, can lead to epilepsy and hyperexcitability. Understanding these processes is key for preventing and treating this neurological disorder.

Keywords:

GABA cortex critical period glutamate hippocampus sodium channels

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Identification and Classification of Position-specific GABAA Receptor Subunit Missense Variants for Their Role In Hippocampal Pyramidal Neurons

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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

Area of Science:

Neuroscience
Developmental Biology
Epileptology

Background:

Epilepsy involves recurrent seizures with diverse causes, including brain development issues.
Epileptogenesis is the process of the brain becoming epileptic, influenced by structural, genetic, and network factors.
Developmental alterations can lead to adult hyperexcitability and epilepsy.

Purpose of the Study:

To review how alterations in brain development contribute to epilepsy.
To explore mechanisms linking developmental defects to neuronal hyperexcitability.
To highlight implications for epilepsy prevention and therapy.

Main Methods:

Review of animal and human studies on developmental epilepsy.
Analysis of malformations of cortical development (MCDs).
Examination of inhibitory interneuron migration and synaptic development defects.

Main Results:

Malformations of cortical development (e.g., focal cortical dysplasia, lissencephaly) are epileptogenic.
Impaired migration of GABAergic interneurons disrupts excitatory/inhibitory balance.
Defects in synapse formation, plasticity, and elimination contribute to hyperexcitability.

Conclusions:

Brain development alterations are critical in epileptogenesis.
Understanding developmental pathways offers targets for epilepsy prevention and treatment.
Further research into developmental mechanisms is crucial for therapeutic advancements.