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The EEG is the most useful laboratory test to help establish

the diagnosis of epilepsy and assist in the accurateclassification of seizures and specific epileptic syndromes.

Characteristic interictal EDs strongly support the diagnosis of

epilepsy, but absence of EDs does not exclude it. EDs are

recorded on the first EEG in 30% to 50% of patients with

epilepsy and in 60% to 90% by the third EEG. Additional EEGs

do not increase the yield further. Thus, 10% to 40% of

patients with epilepsy will not have interictal discharges, even

with repeated EEGs. Sleep, sleep deprivation,

hyperventilation, and photic stimulation increase the yield of

EDs in some patients.

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First page: Merrits Neurology

Succeeding pages:

http://www.slideshare.net/mejar1/handbook-of-eeg-

interpretation

ANTIEPILEPTIC DRUGS

http://www.slideshare.net/mejar1/handbook-of-eeg-interpretationhttp://www.slideshare.net/mejar1/handbook-of-eeg-interpretationhttp://www.slideshare.net/mejar1/handbook-of-eeg-interpretationhttp://www.slideshare.net/mejar1/handbook-of-eeg-interpretationhttp://www.slideshare.net/mejar1/handbook-of-eeg-interpretation

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