What does an EEG show for epilepsy?

What does an EEG show for epilepsy?

An EEG gives information about the electrical activity of the brain during the time the test is happening. When someone has an epileptic seizure their brain activity changes. This change, known as epileptiform brain activity, can sometimes be seen on an EEG recording.

Does abnormal EEG confirm epilepsy?

EEG is occasionally used to: help confirm or exclude epilepsy, following a thorough clinical evaluation (usually with EEG recording during episodes) monitor treatment in some types of epilepsy. help localise the site of seizure activity in a child with focal epilepsy.

How long does an epilepsy EEG take?

The electrodes are connected with wires to an instrument that amplifies the brain waves and records them on computer equipment. Once the electrodes are in place, an EEG typically takes between 20 and 40 minutes. Testing for certain conditions requires you to sleep during the test.

How does a neurologist check for epilepsy?

Electroencephalogram (EEG). This is the most common test used to diagnose epilepsy. In this test, electrodes are attached to your scalp with a paste-like substance or cap. The electrodes record the electrical activity of your brain.

Can you sleep during an EEG?

The beginning of the sleep-deprived EEG test is the same as a standard EEG test. You may then fall asleep or doze while the EEG is still recording the activity in your brain. The test lasts for a few hours and you usually go home once you have woken up.

What happens if you don’t have a seizure during an EEG?

Even someone who has seizures every week can have a normal EEG test. This is because the EEG only shows brain activity during the time of the test. If you aren’t having a seizure at that time, there may not be any unusual brain waves for the test to record. During a seizure, the electrical activity is abnormal.

Can you suddenly develop epilepsy?

Epilepsy can start at any age, but usually starts either in childhood or in people over 60. It’s often lifelong, but can sometimes get slowly better over time.

What are the first signs of epilepsy?


  • Temporary confusion.
  • A staring spell.
  • Stiff muscles.
  • Uncontrollable jerking movements of the arms and legs.
  • Loss of consciousness or awareness.
  • Psychological symptoms such as fear, anxiety or deja vu.
  • September 30, 2022