Epilepsies Chapter 100

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Questions and Answers

What is the primary purpose of a neurological examination in children presenting with epilepsy?

  • To detect neurocutaneous disorders and dysmorphic features (correct)
  • To determine the economic impact of epilepsy
  • To assess the patient's immune response
  • To identify specific viral infections

Which statement accurately describes the function of the EEG in epilepsy diagnosis?

  • It helps confirm the presence of epilepsy and classify it (correct)
  • It serves as a screening tool for all neurological disorders
  • It is used to measure blood flow in the brain
  • It primarily assesses the patient's cognitive function

What characteristic of epileptiform discharges distinguishes them from normal EEG activity?

  • They are of low voltage
  • They are typically of high voltage compared to surrounding activity (correct)
  • They exhibit regular patterns
  • They occur exclusively during sleep

In a referential EEG recording, what do the two inputs in each channel represent?

<p>An active electrode and a neutral reference electrode (A)</p> Signup and view all the answers

What is a significant feature of digital EEG recordings?

<p>They allow for reformatting of montages and filtering to enhance visibility (C)</p> Signup and view all the answers

Why is careful examination of the skin particularly important in children with epilepsy?

<p>To find neurocutaneous disorders associated with epilepsy (D)</p> Signup and view all the answers

What does the term 'lateralization of the epileptogenic zone' refer to?

<p>Identifying the specific side of the brain where seizures originate (B)</p> Signup and view all the answers

What is the ideal condition for the reference electrode in EEG recordings?

<p>It should ideally be a neutral position to avoid bias (D)</p> Signup and view all the answers

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Study Notes

Examination of Epilepsies

  • Examination priorities change with patient age; in children, skin examination is key for identifying neurocutaneous disorders linked to epilepsy.
  • Dysmorphic features may indicate underlying chromosomal abnormalities, aiding in diagnosis.
  • Neurological exams may uncover mental status changes or motor reflex asymmetries, important for locating the epileptogenic zone in focal epilepsy.
  • A significant number of patients often present with a normal neurological examination.

Electroencephalography (EEG)

  • EEG graphically represents voltage changes over time, with each channel capturing potential differences between two scalp electrode positions.
  • Referential recordings feature one electrode as active and another as neutral; however, the neutral reference often lacks true neutrality.
  • Bipolar recordings show potential differences between adjacent electrodes in a defined montage.
  • Digital EEG recordings now standardize EEG practices, allowing for montage reformatting and the use of filters to enhance interictal and ictal EEG activity visualization.
  • When seizure history aligns with epilepsy, EEG serves as the primary test for confirmation, classification (focal or generalized), and sometimes, specific syndrome identification.
  • Criteria for classifying discharges as epileptiform include higher voltage compared to surrounding EEG activity, indicating the presence of seizure activity.

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