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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...

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,...

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.

Secondary Spinal Cord Injury llI: Pathophysiology

Secondary Spinal Cord Injury llI: Pathophysiology

Early Ischemia and Ionic ImbalanceWithin minutes of spinal cord injury, a secondary cascade begins, progressing over hours to weeks. Vascular damage reduces blood flow, causing ischemia and mitochondrial dysfunction. ATP depletion leads to ion pump failure, membrane depolarization, sodium influx, potassium efflux, and water accumulation, resulting in cellular swelling. Increased intracellular calcium further disrupts mitochondria and accelerates cellular injury.Excitotoxicity and Neuronal...

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Related Experiment Video

Updated: Jun 28, 2026

$Stereo-Electro-Encephalo-Graphy (SEEG) With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note$

Stereo-Electro-Encephalo-Graphy (SEEG) With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note

Published on: June 13, 2016

Long-term sequelae of epilepsy.

¹Department of Neurology, Tan Tock Seng Hospital, Singapore.

Annals of the Academy of Medicine, Singapore

|January 1, 1989

Summary

Epilepsy prognosis varies widely, with seizure type and early treatment impacting long-term outcomes. Many factors influence remission, including seizure frequency and neurological status, affecting quality of life.

Area of Science:

Neurology
Clinical Medicine

Background:

Long-term outcomes for epilepsy patients are not well-defined due to diverse syndromes and heterogeneous patient groups in studies.
Prognosis for seizure remission varies significantly by epilepsy type and patient characteristics.

Purpose of the Study:

To elucidate the long-term sequelae and prognosis of epilepsy.
To identify factors influencing seizure remission and developmental outcomes in epileptic individuals.

Main Methods:

Review of existing studies on epilepsy prognosis and long-term outcomes.
Analysis of factors affecting seizure control and remission rates.
Assessment of impact on intellectual development and behavioral issues.

Main Results:

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Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study

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Last Updated: Jun 28, 2026

$Stereo-Electro-Encephalo-Graphy (SEEG) With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note$

Stereo-Electro-Encephalo-Graphy (SEEG) With Robotic Assistance in the Presurgical Evaluation of Medical Refractory Epilepsy: A Technical Note

Published on: June 13, 2016

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

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Published on: December 18, 2016

Anteromesial Temporal Lobectomy for Medically Intractable Temporal Lobe Epilepsy: An Operative Study

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Childhood epilepsies have at least a 50% chance of remission; however, higher pre-treatment seizure burden predicts poorer control.
Factors like partial seizures, multiple seizure types, intellectual disability, and neurological deficits are associated with unfavorable outcomes.
While intellectual regression is rare, intellectual development may slow post-seizure onset, particularly in severe cases or with polypharmacy.

Conclusions:

Epilepsy presents diverse long-term sequelae, ranging from normal life to severe disability or death.
Early intervention and seizure control are crucial for improving long-term prognosis.
Epilepsy is linked to increased risks of behavioral, emotional, and psychiatric problems, influenced by neurological factors and treatment side effects.