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Doctor insights on: Alcohol Affects An Eeg

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How reliable is an eeg?

How reliable is an eeg?

VAGUELY ACCURATE: An EEG is a recording of brain electrical activity taken over the scalp, over about 45 minutes. This brief period may completely miss many paroxysmal events and provide a false negative/normal result. Work with direct electrodes implanted into brain have convincingly demonstrated far more pathology than external recordings. So, basically "hit or miss" issues, and better to clinically assess. ...Read more

Dr. Jeffrey Cohen
381 doctors shared insights

Eeg (Definition)

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 ...Read more


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What is an electroencephalogram (eeg)?

Tests brain activity: A noninvasive, painless exam where electrodes are placed on scalp and electrical activity is recorded via computer. Patient usually sits in a chair, or lays on a stretcher. Indications include seizures and other causes of brain dysfunction. May be used to both diagnose and monitor a seizure disorder. ...Read more

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Can an EEG detect tumors?

Not directly: Eeg measures the activity of brain cells, not tumors. If the tumor is effecting a significant number of brain cells, the eeg may be abnormal. Some tumors cause enough irritation of the brain to cause seizures. These seizures can be located in the brain by eeg. Some tumors will have no effect on the eeg. ...Read more

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What does an infant EEG entail?

What does an infant EEG entail?

Leads placed on head: Generally a neonatal eeg is completed by placing leads on the babies head in certain spots. The leads are generally pasted on, though sometimes needle probes are used. The brain waves are then monitored usually for several hours, though in special cases the eeg maybe continuous overnight, or even several days. This is done mostly to look for seizure activity, though it can also look for damage. ...Read more

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What could cause an abnormal eeg?

Too many causes: The eeg is a measure of the electrical activity of the brain. The brain activity may run rough due to lack of sleep, medications, illness, drugs, brain damage, tumors, malformations, etc. Many findings on eeg are without explanation. Specific patterns may indicate a specific disease condition or be associated with a specific genetic disorder. Children can have strange but benign abnormalities. ...Read more

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What can cause false positive eeg?

EEG: Interictal epileptiform discharges happen in people withdrawing from benzos, have uremia, very low calcium, high levels of lithium, bupropion, and tricyclic antidepressants - even in the absence of seizures. Blind people may have firing in the occipital region, and spikes can fire in neonates during nonrem sleep. Hope this helps. ...Read more

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Does Wilsons Disease show on an EEG?

Does Wilsons Disease show on an EEG?

Wilsons disease: can cause hepatic encephalopathy which in turn can produce slow anterior triphasic waves on an EEG in the absence of liver failure it would not likely produce changes on an EEG. There are labs tests and eye findings that may be helpful in arriving at a diagnosis. ...Read more

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Do you not want to seize during eeg?

Not necessarily: Seizures do not usually occur during an eeg which can show abnormal brain activity (epileptiform findings) in about 50% of people with epilepsy during a routine recording. Seizures do not usually occur during a routine recording but may occur in those with frequent seizures during 24 to 72 hour ambulatory or video monitoring. ...Read more

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Are you born with sharp waves on eeg?

NOT LIKELY, UNLESS: Some infants are born with epilepsy, and their eeg's might be abnormal, but the usual healthy baby should have a normal age-related tracing. ...Read more

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What would make a mildly abnormal eeg?

What would make a mildly abnormal eeg?

Many causes: There are many causes of a mildly abnormal eeg from sleepiness (which can look like slowing) to medications, to medical problems causing a confusional state (delirium) to stroke and so on. Mildly abnormal eeg's are also sometimes seen in people without a definite neurological problem. ...Read more