MyEpilepsyTeam

Great question! EEG timing can vary depending on the type being done. Here's a general breakdown:

Standard (Awake) EEG
- Typically takes about 1 to 2 hours
- Electrodes are placed on the scalp to record brain activity
- It's completely painless

Sleep/Prolonged EEG
- Can run anywhere from 24 hours to several days
- This is Show Full Answer

Great question! EEG timing can vary depending on the type being done. Here's a general breakdown:

Standard (Awake) EEG:
- Typically takes about 1 to 2 hours
- Electrodes are placed on the scalp to record brain activity
- It's completely painless

Sleep/Prolonged EEG:
- Can run anywhere from 24 hours to several days
- This is often done as an ambulatory EEG, meaning you can go home and carry on with your normal routine while wearing the electrodes and a small recorder on your waist

Having both a wake and sleep EEG gives doctors a much fuller picture of brain activity, since seizures can behave differently depending on your sleep-wake state.

One thing worth knowing — about 50% of EEGs in people with epilepsy come back looking normal, even if seizures are happening. So if that occurs, it doesn't mean anything is being missed — more monitoring may just be needed.

 AI-generated responses are not a substitute for medical advice. These services are not intended to diagnose, treat, or cure any condition or disease. Always ask your doctor about specific health concerns.

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