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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...

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...

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:

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.

Ischemic Stroke l: Introduction

Ischemic Stroke l: Introduction

Ischemic stroke is an acute cerebrovascular condition in which blood flow to a brain region is suddenly interrupted, leading to tissue infarction. Neurons depend on continuous oxygen and glucose supply, so even brief reductions in perfusion cause energy failure, ionic imbalance, and irreversible injury. Ischemic strokes are classified into thrombotic and embolic types based on their underlying mechanisms.Thrombotic MechanismsThrombotic stroke develops when a clot forms within a cerebral artery.

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Related Experiment Video

Updated: Jun 24, 2026

Use of a Wireless Video-EEG System to Monitor Epileptiform Discharges Following Lateral Fluid-Percussion Induced Traumatic Brain Injury

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[Seizures and epilepsies after stroke].

¹Neurologische Universitätsklinik, UKGM Marburg, Marburg, Germany. hamer@med.uni-marburg.de

|March 28, 2009

Summary

Epilepsy following stroke is common, with varying risks based on stroke type. Treatment decisions for anti-epileptic drugs (AEDs) often depend on seizure recurrence, with specific AEDs like lamotrigine showing promise.

Area of Science:

Neurology
Clinical Neuroscience
Epileptology

Context:

Epilepsies constitute 20% of adult-onset cases, with stroke being a significant cause.
Post-stroke seizures present diagnostic challenges due to subtle signs and prolonged postictal states.
Community studies indicate 3-4% of stroke patients develop epilepsy.

Purpose:

To review the epidemiology, risk factors, and management of epilepsy after stroke.
To highlight diagnostic complexities and prognostic indicators for post-stroke seizures.
To discuss current recommendations for anti-epileptic drug (AED) initiation and selection.

Summary:

Epilepsy risk varies by stroke type: ischemic infarction (3%), intracerebral hemorrhage (6-10%), and subarachnoid hemorrhage (9%).

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Use of a Wireless Video-EEG System to Monitor Epileptiform Discharges Following Lateral Fluid-Percussion Induced Traumatic Brain Injury

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Risk factors include remote seizures, stroke extent, cortical involvement, and neurological deficit.

AED treatment is generally recommended after the second seizure or a first remote seizure due to high recurrence risk; lamotrigine and gabapentin show efficacy.

Impact:

Informs clinical practice regarding the diagnosis and management of post-stroke epilepsy.
Highlights the importance of considering stroke etiology and seizure characteristics in treatment planning.
Guides the selection of anti-epileptic drugs, considering potential drug interactions in stroke patients.