Table of Contents
What are the procedures for doing an EEG test?
What happens during an EEG?
- You will be asked to relax in a reclining chair or lie on a bed.
- Between 16 and 25 electrodes will be attached to your scalp with a special paste, or a cap containing the electrodes will be used.
- You will be asked to close your eyes, relax, and be still.
How long do EEG results take?
The EEG recording must be analysed by a neurologist, who then sends the results to your doctor. It is important to make a follow-up appointment with your doctor. In many cases, the test results are sent to your doctor within 48 hours of the test. Treatment depends on the diagnosis.
Why would an EEG test and a MRI scan be used to help diagnose epilepsy?
An EEG records the electrical activity of your brain via electrodes affixed to your scalp. EEG results show changes in brain activity that may be useful in diagnosing brain conditions, especially epilepsy and other seizure disorders.
Why do an MRI after an EEG?
Doing an electroencephalogram (EEG), especially after sleep deprivation, may reveal abnormalities in the brain’s electrical activity that may help confirm the diagnosis of epilepsy. CT and MRI scans can be helpful in detecting changes in the brain that could be related to epilepsy.
Which is better EEG or MRI?
In general, MRI is good at telling us where the lesion is, whereas EEG is good at separating normal and abnormal primarily cortical function. The topologic usefulness of EEG is limited, although it may be improved with computerization.
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.
- Brain Infections.
- Attention Disorders.
Does an MRI show seizure activity?
MRI Scans. A doctor may order an MRI scan—in which a magnetic field and radio waves create computerized two- or three-dimensional images—to better view the structure of the brain. The scans may show any problems that may be causing the seizures.
What does EEG show that MRI does not?
The EEG, on the other hand, captures the changing electrical characteristics of a functioning brain, primarily those of the cortex. Conditions can be identified with EEG that as a rule cannot be seen on the MRI; therefore, the use of these studies is not exclusive but complementary.
What is a drawback of having an EEG scan?
One of the big disadvantages of EEG/ERP is that it’s hard to figure out where in the brain the electrical activity is coming from. By putting lots of electrodes all over the scalp (in our lab we use 64 or 128 electrodes), we can get some idea of where the ERP components are strongest.
What problems can an EEG detect?
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.
Why would a neurologist order an EEG?
Why it’s done 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.
What is the most common neurological disorder?
Headaches. Headaches are one of the most common neurological disorders and can affect anyone at any age.