Electroencephalography, angiogram

Electroencephalography, angiogram

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Credit: ZEPHYR/SCIENCE PHOTO LIBRARY

Caption: Coloured angiogram (blood vessel X-ray) of an epileptic 40 year-old man's head (frontal view), overlaid with a 3D computed tomography (3D CT) brain scan. The angiogram is showing blood flow through the left hemisphere of the brain via the left internal carotid artery (light vessel, bottom right). Electrodes on the patient's head are monitoring the brain's electrical activity and producing an electroencephalogram (EEG). While this data is being recorded, the patient is performing memory and language tests. All these techniques combined will help physicians to pinpoint the location of the language centre of the brain, so that it can be avoided and left intact during treatment.

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