Epilepsies Chapter 100

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

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

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

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

What is a significant feature of digital EEG recordings?

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

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

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

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.

This quiz focuses on Chapter 100 of epilepsy which emphasizes the crucial aspects of examination in various age groups, particularly in children. It details the importance of identifying neurocutaneous disorders and the significance of neurological examinations. Understanding the implications of dysmorphic features and their associations with chromosomal abnormalities is key to this chapter.