EEG After a First Seizure
Same-day workup. Same-day expert assessment. Clear answers about what just happened and what to do next.
After a First Seizure: What Happens Next
A first seizure is frightening. The most important next step is a clear, expert workup that answers three questions: was it actually a seizure, what caused it, and what is the chance of it happening again.
Detailed clinical history
What you and any witnesses observed matters more than any test. Your neurologist will go through the event carefully — what you felt before, what others saw, how long it lasted, and how you recovered. This is what distinguishes a seizure from a faint or other mimic.
EEG (electroencephalogram)
Looks for epileptiform discharges — brief abnormal electrical patterns that indicate an underlying tendency to seizures. A normal EEG is reassuring but does not rule epilepsy out. An abnormal EEG significantly raises recurrence risk and influences whether to start treatment.
MRI of the brain
Most adults after a first seizure should have an MRI to look for any structural cause (such as a scar, vascular lesion, or other abnormality). MRI is arranged separately but should usually happen within weeks.
Plan and conversation
Driving advice, lifestyle factors (sleep, alcohol), whether to start anti-seizure medication, and what to do if it happens again. You leave with a plan, not just a report.
Was It Really a Seizure?
Many things can look like a seizure. Getting the diagnosis right matters — the implications for driving, treatment, and recurrence risk are very different.
Epileptic seizure
An abnormal burst of brain electrical activity. May involve loss of awareness, jerking movements, blank staring, unusual sensations or fear. EEG and MRI are the standard workup.
Syncope (faint)
A brief loss of consciousness from reduced blood flow to the brain. Often triggered by standing up, pain, or strong emotion. Can include a few brief jerks, which is why it is often mistaken for a seizure. Worked up with ECG and tilt or autonomic testing.
Other mimics
Migraine aura, panic attack, transient ischaemic attack, low blood sugar, parasomnia, and functional seizures can all resemble an epileptic seizure. A careful history is what distinguishes them.
Recurrence Risk — What the EEG Tells Us
EEG findings significantly change the chance of having another seizure.
Recurrence risk after one unprovoked seizure is around 30 to 40 percent over two years.
Recurrence risk rises substantially. Treatment is more often recommended.
Also raises recurrence risk. Treatment is usually offered.
Independently raises recurrence risk, even with normal investigations.
Frequently Asked Questions
How quickly should I be assessed after a first seizure?
Current guidelines recommend specialist neurology review and EEG within weeks, not months. Earlier assessment helps clarify whether the event was truly a seizure, identifies a provoked cause where possible, and informs decisions about driving and treatment.
What is the chance of another seizure after the first?
Overall recurrence risk after one unprovoked seizure is around 30 to 40 percent over the next two years. The risk is higher when EEG shows epileptiform discharges, when MRI shows a structural lesion, or when the seizure happened during sleep.
Can I drive after a first seizure?
In New South Wales there are specific non-driving periods after a seizure. Your neurologist will explain the current rules and help you notify the relevant authority. Do not drive until you have had this conversation.
Will I be started on medication after one seizure?
Not always. The decision depends on your recurrence risk, EEG and MRI findings, the type of seizure, and your circumstances. Some people are best managed by careful observation, others benefit from immediate treatment. This is an individualised conversation.
Do I need an MRI as well as an EEG?
Most adults with a first unprovoked seizure should have both. EEG looks at electrical function, MRI looks at structure. Together they give the most complete picture and the most accurate recurrence risk estimate.
Recently Had a First Seizure?
Same-day expert reporting. Don't wait weeks. Bondi Junction.