- Diagnosis of Brain Disorders : Electroencephalography (EEG) could be used as a screening tool for brain disorders in order to make sure whether there is brain lesion or where lesion is located. With EEG, we can evaluate the function of cerebral cortex.
- Diagnosis of Epilepsy or Seizure Disorder : EEG is a necessary and important diagnostic basis for epilepsy or seizure disorder.
- Others : EEG could be used to assist the diagnosis of metabolic encephalopathy, brain injury, and dysfunction of cerebral circulation, encephalitis, and tranquilizer intoxication.
Preparation before EEG Examination
- Thoroughly wash and clean your hair the day before EEG examination. Hair glue or grease is forbidden.
- No fasting is needed before EEG examination.
- If you will receive “ sleep EEG ” examination, try to reduced your sleep time the night before exam. Such as: sleep after midnight, so you may fall asleep easily during the examination.
The Examination Process
- You will be arranged to lie in a gentle-illuminated quiet room.
- Technicians will use electrode paste to stabilize the recording leads on your head.
- Try to stay in a rested and relaxed condition.
- During the examination, you will be asked to lie down quietly. Photic stimulation will be given and a series of deep breath will be demanded, so technicians can record abnormal brain discharges.
- It takes about 30 minutes for routine awake EEG. For “ sleep EEG ”, It could take around 1 ~ 1.5 hours, depending on how long it is for you to fall asleep.
Notes after EEG Examination
- You could perform your normal daily activities and routines immediately after EEG examination.
- Rinse electrode paste with clean water.