What does abnormal EEG mean?

An abnormal EEG means that there is a problem in an area of brain activity. This can offer a clue in diagnosing various neurological conditions.

What are the possible causes for an abnormal EEG?

Abnormal results on an EEG test may be due to:

  • Abnormal bleeding (hemorrhage)
  • An abnormal structure in the brain (such as a brain tumor)
  • Tissue death due to a blockage in blood flow (cerebral infarction)
  • Drug or alcohol abuse.
  • Head injury.
  • Migraines (in some cases)
  • Seizure disorder (such as epilepsy)

Can an abnormal EEG mean nothing?

An abnormal EEG doesn’t automatically mean that you, for example, have epilepsy. The EEGs of babies and young children can often record irregular patterns that don’t mean anything, or the irregularities may flag previously diagnosed neurological conditions such as cerebral palsy.

Can you have an abnormal EEG without having epilepsy?

Furthermore, about 2% of normal school-age children who do not have seizures have epileptic activity on EEG. Conversely, a normal EEG does not exclude epilepsy. Many types of epilepsy may be associated with a normal EEG between seizures. A normal EEG during a “seizure” usually excludes epilepsy as the cause.

Does an abnormal EEG always mean epilepsy?

Many patients with epilepsy have a normal EEG between attacks. An abnormal EEG means I have epilepsy. Many people without seizures have mild abnormalities on EEG. Epilepsy is a clinical diagnosis, that is, made on the basis of history and examination.

How is abnormal EEG treated?

Epilepsy may be treated with antiepileptic medications (AEDs), diet therapy and surgery. Medications are the initial treatment choice for almost all patients with multiple seizures.

Can anxiety cause abnormal EEG?

Background. Since the 1980s, a high EEG abnormality rate has been reported for patients with panic disorder.

Can EEG detect brain tumor?

EEG can also detect abnormal brain waves after a head injury, stroke, or brain tumor. Other conditions such as dizziness, headache, dementia, and sleeping problems may show abnormal brain patterns. It can also be used to confirm brain death.

Can an EEG show brain damage?

An EEG can determine changes in brain activity that might be useful in diagnosing brain disorders, especially epilepsy or another seizure disorder. An EEG might also be helpful for diagnosing or treating the following disorders: Brain tumor. Brain damage from head injury.

Can you have abnormal brain activity without seizures?

Some people experience symptoms similar to those of an epileptic seizure but without any unusual electrical activity in the brain. When this happens it is known as a non-epileptic seizure (NES).

Will an EEG show a seizure?

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.

Does EEG show past seizures?

The EEG generally records brain waves between seizures, called interictal brain waves. These waves may or may not show evidence of seizure activity.

Can an EEG be misread?

The consequences of misreading EEGs are many. First, it may delay arriving at the correct diagnosis. Once a patient is ‘labeled’ with a diagnosis, it is difficult to undo it. It requires obtaining the original EEG and reinterpreting it.

How accurate is EEG results?

EEG review yielded 1-week accuracy in 10–52% of recordings, and 2-week accuracy in 28–75% of recordings (n = 146; Fig. 3E and F).

What does a spike on an EEG mean?

Spikes or sharp waves are terms commonly seen in EEG reports. If these happen only once in a while or at certain times of day, they may not mean anything. If they happen frequently or are found in specific areas of the brain, it could mean there is potentially an area of seizure activity nearby.

How often is an EEG abnormal?

More than 10% of normal people may have non-specific EEG abnormalities and approximately 1% may have ‘epileptiform paroxysmal activity’ without seizures. The prevalence of these abnormalities is higher in children, with 2–4% having functional spike discharges.

What can an EEG show that an MRI Cannot?

An EEG test only gives information about the electrical activity in your brain. It doesn’t show if there’s any damage or physical abnormalities in your brain. An MRI can do this.

What are 10 conditions diagnosed with an EEG?

10 Conditions Diagnosed With an EEG

  • Seizure Disorders. The primary use of EEG is diagnosing epilepsy and other seizure disorders. …
  • Sleep Disorders. Sleep disorders range from insomnia to narcolepsy. …
  • Brain Tumors. There are many types of brain tumors. …
  • Brain Injury. …
  • Dementia. …
  • Brain Infections. …
  • Stroke. …
  • Attention Disorders.

Will an EEG show a stroke?

These results indicate that stroke and stroke severity can be detected with the Muse EEG system. Brain symmetry differs between stroke patients and controls at certain frequencies. Additionally, DAR and DTABR are increased in moderate and severe strokes, indicating that there is a slowing in brain activity.

Which is better EEG or MRI?

MRI has a higher spatial resolution than electroencephalography (EEG). MRI with hyperintense lesions on FLAIR and DWI provides information related to brain activity over a longer period of time than a standard EEG where only controversial patterns like lateralized periodic discharges (LPDs) may be recorded.

Can EEG pick up anxiety?

EEG identifies brain signal that correlates with depression and anxiety.

Can an EEG show mental illness?

Electroencephalography, or EEG, technology that measures brain function could encourage earlier diagnoses of common mental and neurological disorders, including autism, ADHD and dementia, according to findings published in The Neurodiagnostic Journal.