Eeg Of Epileptic Seizures
by Science Source
Title
Eeg Of Epileptic Seizures
Artist
Science Source
Medium
Photograph - Photograph
Description
The seizures of epilepsy are dramatically demonstrated by the EEG traces. The largest and most regular electrical activity of the brain occurs in an attack of 'petit mal', although the patient may only go blank for a few seconds. The ' wave and spike' fluctuations (top), explosions of electrical energy, may involve almost the whole brain for a minute or more. During the more dangerous and more terrifying 'grand mal', in which the patient falls to the ground, loses conscious-ness, goes stiff and then jerks violently, the traces show modest 8-per second waves which then increase in frequency and fluctuation (center) until, at the jerking stage, the pattern changes to show complex discharges, rather like the 'wave and spike' of petit mal, one discharge for each jerk of the body.
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March 7th, 2013
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