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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 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,...

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...

Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists

Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists

Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function. They...

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Related Experiment Video

Updated: Jul 3, 2026

Investigating Social Cognition in Infants and Adults Using Dense Array Electroencephalography (dEEG)

Investigating Social Cognition in Infants and Adults Using Dense Array Electroencephalography (_dEEG)

Published on: June 27, 2011

[Cognition and epilepsies].

H Stefan¹, E Pauli

¹Epilepsiezentrum-Neurologische Klinik, Universitätsklinikum Erlangen, Schwabachanlage 6, 91054, Erlangen, Germany. Hermann.stefan@uk-erlangen.de

|August 8, 2008

Summary

This summary is machine-generated.

In chronic epilepsy, cognitive dysfunction often appears before seizures, linked to underlying causes. Seizures and treatments can worsen cognitive decline, necessitating personalized patient assessments.

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Assessment of Memory Function in Pilocarpine-induced Epileptic Mice

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Last Updated: Jul 3, 2026

Investigating Social Cognition in Infants and Adults Using Dense Array Electroencephalography (dEEG)

Investigating Social Cognition in Infants and Adults Using Dense Array Electroencephalography (_dEEG)

Published on: June 27, 2011

Investigating the Function of Deep Cortical and Subcortical Structures Using Stereotactic Electroencephalography: Lessons from the Anterior Cingulate Cortex

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Assessment of Memory Function in Pilocarpine-induced Epileptic Mice

Assessment of Memory Function in Pilocarpine-induced Epileptic Mice

Published on: June 4, 2020

Area of Science:

Neurology
Cognitive Science

Context:

Cognitive dysfunction is a recognized issue in chronic epilepsy.
Its onset predates seizures, correlating with underlying pathology.

Purpose:

To explore the relationship between epilepsy, seizures, and cognitive decline.
To investigate the cognitive risks associated with epilepsy treatments.

Summary:

Cognitive disorders in epilepsy stem from underlying lesions or physiological processes, preceding seizure onset.
The cumulative impact of seizures on cognitive function requires further clarification.
Both surgical interventions and antiepileptic drugs pose risks for cognitive impairment, particularly memory deficits.

Impact:

Highlights the need for long-term cognitive monitoring in epilepsy.
Emphasizes individualized treatment strategies to mitigate cognitive side effects.
Underscores the importance of assessing cognitive function for optimizing patient care in epilepsy management.