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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:

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...

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 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.

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

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Ictal EEG patterns in epilepsy with centro-temporal spikes.

Giuseppe Capovilla¹, Francesca Beccaria, Amedeo Bianchi

¹Epilepsy Center, Department of Child Neuropsychiatry, C. Poma Hospital, Mantova, Italy. pippo.capovilla@aopoma.it

Brain & Development

|July 6, 2010

Summary

This study found no single EEG pattern for benign childhood epilepsy with centro-temporal spikes (BCECTS). Seizure patterns can change, and initial EEG changes are common in BCECTS patients.

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Area of Science:

Neurology
Epileptology
Clinical Neurophysiology

Background:

Benign childhood epilepsy with centro-temporal spikes (BCECTS) is a common epilepsy syndrome.
Understanding the electroencephalogram (EEG) patterns during seizures is crucial for diagnosis and management.

Purpose of the Study:

To characterize the ictal EEG patterns in patients diagnosed with BCECTS.
To determine if a unique EEG signature exists for seizures in BCECTS.

Main Methods:

Retrospective review of clinical and EEG data from 701 BCECTS patients across 10 epilepsy centers.
Analysis of 34 recorded seizures from 30 patients with a minimum 3-year follow-up.

Main Results:

Four distinct ictal EEG patterns (A-D) were identified, with Pattern A being the most frequent.
Pattern D included initial focal EEG depression preceding other patterns.
Seizures often showed alterations between patterns (21/28 children), and no clinical or EEG feature predicted a specific pattern.

Conclusions:

A single, unique ictal EEG pattern for BCECTS could not be identified.
Per-ictal EEG features like initial depression or post-ictal slowing are common and should not be misconstrued.
Dynamic changes in ictal EEG patterns are consistent with a BCECTS diagnosis.