An electroencephalogram, or EEG, is a test that measures the electrical activity of the brain. It can be used to diagnose or monitor conditions that affect the brain, such as epilepsy and sleep disorders. Your doctor will let you know if you need to have an EEG.

Normal EEG results mean that there is no abnormal electrical activity in the brain. Increased/decreased electrical activity indicates the presence of a brain disorder which is clarified by the physician/neurologist on viewing and analysing the EEG results.