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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...

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Related Experiment Video

Updated: May 2, 2026

A Multimodal Imaging- and Stimulation-based Method of Evaluating Connectivity-related Brain Excitability in Patients with Epilepsy

A Multimodal Imaging- and Stimulation-based Method of Evaluating Connectivity-related Brain Excitability in Patients with Epilepsy

Published on: November 13, 2016

Functional neuroimaging in epileptic encephalopathies.

Michael Siniatchkin¹, Giuseppe Capovilla

¹Clinic of Child and Adolescents Psychiatry, Goethe-University of Frankfurt, Frankfurt, Germany.

|February 28, 2014

Summary

Epileptic encephalopathies (EEs) involve cognitive and behavioral issues. Neuroimaging reveals syndrome-specific brain activity patterns, like default mode network disruptions, contributing to cognitive disability in EEs.

Keywords:

Epileptic encephalopathy Lennox-Gastaut syndrome Neuroimaging West syndrome fMRI

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Area of Science:

Neuroscience
Neurology
Medical Imaging

Background:

Epileptic encephalopathies (EEs) are severe epilepsy disorders linked to cognitive and behavioral impairments.
The precise mechanisms driving cognitive disability in EEs are not fully understood.

Purpose of the Study:

To review neuroimaging studies identifying brain activation patterns in EEs.
To explore syndrome-specific propagation of epileptic activity and its cognitive impact.

Main Methods:

Systematic review of neuroimaging research in epileptic encephalopathies.
Analysis of brain activation patterns and network connectivity in relation to epileptic activity.

Main Results:

Epileptic activity propagation appears to be syndrome-specific.
Some EEs show disrupted default mode network activity.
Other EEs exhibit abnormal connectivity or thalamocortical network interference.

Conclusions:

Neuroimaging reveals distinct brain activity fingerprints in EEs.
Understanding these patterns is crucial for addressing cognitive disability.
Further research is needed on the impact of epileptic activity on cognition and development.