Howtosignalprocessing
The time interval associated with the highest probability of detecting an epileptiform EEG pattern was within the first 16 h after seizure onset: 52.1% of recordings performed before the 16-h cut-off showed these abnormal patterns compared with 20.2% performed after (p < 0.001).
- Can an EEG see past seizures?
- Do past seizures show up on MRI?
- How do they test for past seizures?
- Can doctors tell if you had a seizure?
Can an EEG see past seizures?
An EEG can usually show if you are having a seizure at the time of the test, but it can't show what happens to your brain at any other time. So even though your test results might not show any unusual activity it does not rule out having epilepsy.
Do past seizures show up on MRI?
Does epilepsy show up on MRI scans? No, not necessarily. An MRI scan can help your doctor understand some of the possible underlying structural causes of your seizures. However, for many people there is no structural cause behind their epilepsy and so the brain scan comes back 'normal'.
How do they test for past seizures?
An electroencephalogram (EEG).
The electrodes record the electrical activity of your brain, which shows up as wavy lines on an EEG recording. The EEG may reveal a pattern that tells doctors whether a seizure is likely to occur again.
Can doctors tell if you had a seizure?
Tests for diagnosing seizures
If this is your first seizure, your doctor may want to do some scans to look at the structures in your brain. A common form of imaging is MRI. Your doctor may also want to assess how the naturally occurring activity in your brain is functioning. To do this, an EEG is performed.
