ELECTRO ENCEPHALOGRAPHY (EEG)

 

  • In this test we record electrical activity of brain. It is akin to ECG of heart.
  • In this surface electrodes are applied on scalp. These are connected to machine & activity of brain recorded.
  • During this test patient is asked to do hyperventilation & stimulation of eyes with light by a bulb at different frequencies is also done to provoke abnormality.
  • At times we record an EEG in a sleep deprived state. In this patient does not sleep over night & we record an EEG in morning.
  • This test is done commonly in patients of epilepsy.
  • 2-3% Normal population may have on abnormal EEG & however a normal EEG does not rule out epilepsy.

 

EEG graphs  EEG Patient

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