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Related Concept Videos

Seizures l: Introduction01:20

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: Classification01:13

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:
Patterns of Fever01:26

Patterns of Fever

Before understanding the types and patterns of fever, it is essential to know its phases.
Epilepsy and Seizures: Overview01:24

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: Types01:22

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 ll: Types01:19

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...

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Related Experiment Video

Updated: Jul 8, 2026

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
09:57

Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy

Published on: September 20, 2024

Inconsistency between prospectively and retrospectively reported febrile seizures.

M Sillanpää1, P R Camfield, C S Camfield

  • 1Department of Child Neurology, University of Turku, Turku, Finland. matti.sillanpaa@utu.fi

Developmental Medicine and Child Neurology
|January 5, 2008
PubMed
Summary

Parental recall of febrile seizures (FS) underestimated their incidence compared to prospective reporting. Retrospective data showed lower sensitivity but high specificity for identifying FS cases in children.

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A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy
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A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy

Published on: July 12, 2021

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Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
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A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy
06:58

A Behavioral Screen for Heat-Induced Seizures in Mouse Models of Epilepsy

Published on: July 12, 2021

Area of Science:

  • Pediatrics
  • Epidemiology
  • Neurology

Background:

  • Febrile seizures (FS) are common in childhood.
  • Accurate incidence data are crucial for understanding FS and its long-term implications.
  • Prospective and retrospective methods may yield different prevalence estimates.

Purpose of the Study:

  • To compare prospective incidence data with retrospective parental recall of febrile seizures (FS).
  • To evaluate the accuracy of parental recall in identifying FS cases up to age 12.
  • To assess biases in retrospective data collection for FS.

Main Methods:

  • A cohort of 807 children had prospective FS data collected up to age 5.
  • At age 12, parental recall of FS was assessed using the same questionnaire.
  • Statistical analysis compared prospective incidence with retrospective prevalence, calculating sensitivity, specificity, and predictive values.

Main Results:

  • Prospective cumulative incidence was 7.1%, while retrospective prevalence was 5.6%.
  • Retrospective data showed under-reporting (19 children) and over-reporting (8 children).
  • Retrospective approach had 65% sensitivity, 99% specificity, 82% positive predictive value, and 97% negative predictive value.

Conclusions:

  • Retrospective parental recall underestimates the frequency of febrile seizures (FS) despite high specificity.
  • Prospective data may miss some FS cases, as suggested by recall data.
  • Biases in recall methods must be considered when using FS data for predicting future health effects.