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Doctor insights on: Eeg

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Dr. Jeffrey Cohen
401 doctors shared insights

Eeg (Overview)

An electroencephaolgram (eeg) is a test that uses wires on the scalp to measure electrical activity produced by the brain. It is used to assess cerebral activity, and can be very helpful in the diagnosis and treatment of seizures as well as other brain disorders.


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What are EEG and MRI used for in evaluating seizures?

What are EEG and  MRI used for in evaluating seizures?

Find cause: Mri may reveal structural cause for seizures. Eeg may show seizures or spikes (electrical abnormalities highly associated with the clinical occurrence of seizures. Type of "spikes" on eeg may help determine the seizure type and whether there is a genetic basis of seizures. ...Read more

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Dr. Jeffrey Cohen
401 doctors shared insights

Eeg (Overview)

An electroencephaolgram (eeg) is a test that uses wires on the scalp to measure electrical activity produced by the brain. It is used to assess cerebral activity, and can be very helpful in the diagnosis and treatment of seizures as well as other brain disorders.


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Could you explain what is an MRI or EEG like exactly?

Structure/function: An MRI looks at the structure of the body by using magnetic fields. You lie quietly on a table inside a donut-shaped magnet. Sometimes IV contrast is used to bring out the detail in certain structures. An eeg looks at brain function. Wires are placed on the scalp using an adhesive paste, and you lie quietly while an machine records the electrical signals generated by brain activity. ...Read more

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How accurate are eegs?

Utility of the EEG: An EEG measures the brain waves. If one is obtained during a seizure, they are diagnostic for seizure. This is much better than seeing a seizure with our eyes.

The EEG is also helpful for monitoring brain activity during sleep and alertness, coma and confusion. ...Read more

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What is the purpose of EEG for a temporal lobe seizure?

What is the purpose of EEG for a temporal lobe seizure?

Locate focus: Eeg- electroencephalography is utilized in temporal lobe seizures and other seizure disorders to localize the focus of the seizure.
Sometimes when the focus is found, there may be a surgical solution for the seizure and the focus can be removed. ...Read more

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What does the EEG measure?

What does the EEG measure?

Electrical activity: Eeg measures the electrical activity of nerves in the brain, most prominently the postsynaptic potentials generated by neurons at the top of the gyri (the "folds" of tissue on the brain surface). ...Read more

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My 2 yr son suffered seizures 3 months ago, doc said the EEG was abnormal. Today again his EEG is abnormal. Is it safe to travel by air for 24 hours?

Febrile seizures?: The most common seizures at that age are those associated with illness with fever. Eeg at that age is very difficult to interpret. If he is not well and otherwise doing well, air travel should be no problems. Ask your doctor, but treatment with Lorazepam tablet 0.5mg just before the flight would be safe with another dose during flight if indicated. ...Read more

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Clean brain mri, CT and eeg. Do they rule out all dangerous causes of left side face/arm numb feeling and headaches that comes n goes past month?

Clean brain mri, CT and eeg. Do they rule out all dangerous causes of left side face/arm numb feeling and headaches that comes n goes past month?

Yes: It seems that you are having migraine headaches which can be associated with stroke or TIA like symptoms. Get preventative treatment for migraines and headaches and numbness will be controlled. ...Read more

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If a 16yo has 2 seizures with eyes rolling and can't be woke up within 2 days 1 neg EEG 1 pos does this mean hes epileptic drs don't know?

If a 16yo has 2 seizures with eyes rolling and can't be woke up within 2 days 1 neg EEG 1 pos does this mean hes epileptic drs don't know?

Unsure diagnosis: Epilepsy should not be diagnosed until other diagnoses have been ruled out, including neuro, cardiac, metabolic or toxic causes. I assume patient is in a hospital as he has been out for two days and has had an eeg, and if they are not, they should be. Epilepsy does not normally present with extended loss of consciousness and this can be a more ominous sign. If no answer, needs to see specialist. ...Read more

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What are causes of abnormal EEG results?

EEGs are hard: An abnormal eeg can mean many things. Intermittent changes in eeg, like theta discharges or spikes, can be associated with epileptic seizures or other intermittent symptoms like migraine. Continuous changes, like slow background, can be an effect of drugs or internal disorders like liver or kidney disease. Changes in one spot of the head could mean damage like stroke or tumor. ...Read more

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What does an XL event on an EEG mean? How does it differ from an XL spike?

What does an XL event on an EEG mean? How does it differ from an XL spike?

No physical symptoms: An XL spike on EEG is basically just a sudden brief burst of electrical activity that doesn't actually create the outward signs of a seizure. "Events" may be similar, but more of a subclinical seizure, evidence for seizure activity on the EEG but no outward physical sign of seizure. ...Read more

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Abnormal EEG means epilepsy, or are there other people with abnormal EEG but are perfectly fine, please help!?

Abnormal EEG means epilepsy, or are there other people with abnormal EEG but are perfectly fine, please help!?

Depends on setting: While there are people with abnormal eegs who do not have any symptoms, most eeg abnormalities do suggest an underlying problem. That being said, not all abnormalities are created equal- some may simply mean that the patient was sleep deprived, while others can signify constant ongoing seizure activity. A neurologist can help put the findings in the right context. ...Read more

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There are occasional high voltage sharp waves seen bilaterally. Is these the baseline for a neurologist give a diagnosis of ABNORMAL EEG?

EEG interpretation: An EEG done for very young patients is sometimes difficult to interpret. Abnormalities are common for patients less than 2 years old. It may be the pattern or size that are important. If the sharp waves are large enough though, these may be considered abnormal. ...Read more

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Can a baby have a normal EEG but still have a seizure problem?

Can a baby have a normal EEG but still have a seizure problem?

Yes: You can have an abnormal eeg without seizures and seizures with a normal eeg. The commonest seizure in infants is with a fever (febrile seizures). They usually disappear with a little aging but may requjire medication for a while. ...Read more

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How accurate are eegs?

Utility of the EEG: An EEG measures the brain waves. If one is obtained during a seizure, they are diagnostic for seizure. This is much better than seeing a seizure with our eyes.

The EEG is also helpful for monitoring brain activity during sleep and alertness, coma and confusion. ...Read more

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What is an EEG for?

What is an EEG for?

Brain activity: Eeg is a test of physiological function, and records brain electical activity (like electrocardiogram for heart). It is used to check for seizure activity, to evaluate various headache issues, to check patients with memory loss, evaluated folks with brain infections, and also confirm brain death. ...Read more