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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 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 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...

Lobes of the Cerebrum

Lobes of the Cerebrum

The cerebral cortex, a critical structure of the brain, is intricately divided into two hemispheres, each consisting of four distinct lobes: occipital, temporal, frontal, and parietal. These lobes function cooperatively to regulate various cognitive and sensory functions, forming the basis of our complex neural capabilities.
Frontal lobe
The frontal lobes, located behind the forehead, are the command center of our brain, controlling personality, intelligence, and voluntary muscle movements.

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Related Experiment Video

Updated: Jun 4, 2026

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

Published on: August 16, 2024

Frontal lobe epilepsy.

Pedro Beleza¹, João Pinho

¹Epilepsy Group, Department of Neurology, Braga Hospital, Largo Carlos Amarante, Apartado 2242, Braga 4701-965, Portugal. beleza.76@gmail.com

Journal of Clinical Neuroscience : Official Journal of the Neurosurgical Society of Australasia

|February 26, 2011

Summary

Frontal lobe epilepsy (FLE) affects about 25% of patients with refractory epilepsy. Understanding seizure types and EEG findings is crucial for surgical evaluation and treatment of this condition.

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Frontal Disconnection for Treating Mild Malformation of Cortical Development with Oligodendroglial Hyperplasia in Epilepsy (MOGHE) in the Frontal Lobe

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Network Analysis of Foramen Ovale Electrode Recordings in Drug-resistant Temporal Lobe Epilepsy Patients

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Published on: December 18, 2016

Area of Science:

Neurology
Epileptology

Background:

Frontal lobe epilepsy (FLE) accounts for approximately 25% of refractory focal epilepsies.
Typical seizure semiology includes unilateral clonic, tonic asymmetric, or hypermotor seizures.

Purpose of the Study:

To review typical seizure semiology, interictal and ictal electroencephalogram (EEG) findings for different FLE subtypes.
To discuss etiology, medical treatment, and surgical options for frontal lobe epilepsy.

Main Methods:

Review of seizure semiology.
Analysis of interictal and ictal EEG findings.
Discussion of neuroimaging (SPECT/PET) and pre-surgical evaluation strategies.

Main Results:

Interictal EEG often shows epileptiform discharges and rhythmical midline theta, aiding localization.
Ictal EEG utility is limited by artifacts and limited scalp electrode coverage of the frontal lobe.
Neuroimaging techniques like SPECT and PET localize FLE in about one-third of cases.

Conclusions:

Subclassification of FLE (dorsolateral, mesial, basal) is vital for minimal cortical resection during surgery.
Comprehensive pre-surgical evaluation integrating semiology, EEG, and imaging is essential for effective management.