Question: What Happens If EEG Is Abnormal?

Does an abnormal EEG confirm epilepsy?

An electroencephalogram (EEG) can show irregular activity in the brain that can indicate seizures..

What can a EEG tell you?

An electroencephalogram (EEG) is a noninvasive test that records electrical patterns in your brain. The test is used to help diagnose conditions such as seizures, epilepsy, head injuries, dizziness, headaches, brain tumors and sleeping problems. It can also be used to confirm brain death.

What is happening in the brain during a seizure?

It consists of nerve cells that communicate with each other through electrical activity. A seizure occurs when part(s) of the brain receives a burst of abnormal electrical signals that temporarily interrupts normal electrical brain function.

What are the 3 main phases of a seizure?

Seizures take on many different forms and have a beginning (prodrome and aura), middle (ictal) and end (post-ictal) stage.

Can doctors tell if you’ve had a seizure?

An electroencephalogram (EEG) can help your doctor diagnose a seizure. This test measures your brain waves. Viewing brain waves during a seizure can help your doctor diagnose the type of seizure. Imaging scans such as a CT scan or MRI scan also can help by providing a clear picture of the brain.

What does a seizure feel like?

Seizure signs and symptoms may include: Temporary confusion. A staring spell. Uncontrollable jerking movements of the arms and legs.

Can EEG be wrong?

Yes, EEG can be bad for you. The consequences of being misdiagnosed with epilepsy are obvious and serious [9]. When the diagnosis is based largely on an abnormal EEG, no amount of subsequent normal EEGs will ‘cancel’ the previous abnormal one, and the wrong diagnosis is very difficult to undo.

What is abnormal brain activity?

Abnormal electrical activity in the brain can cause seizures. When a person has repeated seizures, this condition is called epilepsy. Diagnosis and treatment of these disorders often requires consultation with a neurologist.

Can a 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.

What should you never do when someone is having a seizure?

Do not hold the person down or try to stop his or her movements.Do not put anything in the person’s mouth. This can injure teeth or the jaw. … Do not try to give mouth-to-mouth breaths (like CPR). … Do not offer the person water or food until he or she is fully alert.

Does anxiety show up on EEG?

We see anxiety as one manifestation of diminished self-regulation by the brain. The condition is often quite obvious in the EEG. The condition is highly responsive to brainwave training.

How does an abnormal EEG look like?

The other way an EEG can show abnormal results is called non-epileptiform changes. This can be a general change in the way a normal brain wave looks. It may have an abnormal frequency, height or shape. It can also be a brain wave showing up that should not.

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)More items…•

Can an EEG detect dementia?

EEG can diagnose the two most common types of dementia (i.e., AD and VaD) because both of these types are cortical, and EEG reflects hidden brain abnormalities [72, 73].

What is Jeavons syndrome?

Epilepsy with Eyelid Myoclonia, sometimes called Jeavons syndrome, is a rare form of epilepsy. It typically starts between 2-14 years (most between 6-8 years) and is more common in girls. The cause is unknown, but there is likely a genetic predisposition (tendency).

What can affect EEG results?

Certain factors or conditions may interfere with the reading of an EEG test. These include: Low blood sugar (hypoglycemia) caused by fasting. Body or eye movement during the tests (but this will rarely, if ever, significantly interfere with the interpretation of the test)

What does a spike on an EEG mean?

sharp wavesSpikes 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.

What causes unusual brain activity?

Epilepsy is a central nervous system (neurological) disorder in which brain activity becomes abnormal, causing seizures or periods of unusual behavior, sensations, and sometimes loss of awareness. Anyone can develop epilepsy. Epilepsy affects both males and females of all races, ethnic backgrounds and ages.

What are the 3 types of seizures?

Types of Generalized-Onset SeizuresAbsence Seizures (“Petit Mal Seizures”) … Myoclonic seizures. … Tonic and Atonic Seizures (“Drop Attacks”) … Tonic, Clonic and Tonic-Clonic (Formerly called Grand Mal) Seizures.

What does an EEG look like with seizures?

When a seizure happens during an EEG, the normal pattern of brain activity that is seen on the EEG reading changes, and different brain activity can be seen. In focal seizures the change in brain activity can be seen only on the electrodes on the part of the brain the seizure is happening in.

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.