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Doctor insights on: Imaging Eeg Electroencephalogram

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What is an electroencephalogram (eeg)?

What is an electroencephalogram (eeg)?

EEG: An EEG is a test that records the various brain waves emitted from the brain. The test is done by placing tiny electrodes all around the head and scalp, and recording the electrical activity emitted by the brain and recorded by tracing the waves onto recording paper. ...Read more

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Dr. Jeffrey Cohen
396 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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How much tome to take EEG testing (electroencephalogram)?

20-40 minutes: Putting the electrodes in place initially takes 20-30 minutes, and then the test proper takes 20-40 minutes after that. Sometimes people will get an "ambulatory eeg, " in which the study goes on for days at a time, but these are much less common. ...Read more

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What doctor inteprets a EEG (electroencephalogram)?

Neurologist: Diagnostic eegs are read by neurologists. Neurosurgeons are trained to read eegs as they relate to lesions to be removed during epilepsy surgery. ...Read more

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Can an EEG (electroencephalogram) detect brain tumors?

Can an EEG (electroencephalogram) detect brain tumors?

No: Eeg can show presence of seizure brain wave activity.These seizure brain activity can be caused by different conditions such as metabolic abnormality, lack of blood supply to brain cells, medication, epilepsy, brain tumor related, etc. It analyzes the brain "function" not the anatomy thus it can't detect brain tumor specifically. Mri needs to be done to detect brain tumors. Discuss with your md. ...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

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How does an EEG work?

How does an EEG work?

Electrical recording: In the same way an ekg measures electrical activity from the heart, an EEG measures activity from the brain. Electrodes are placed on the scalp and the patient lies quietly while brainwaves are recorded. Sometimes, hyperventilation and/or flashing lights are used to evoke different responses. It is important to relax, as electrical activity from muscle can swamp the signals from the brain. ...Read more

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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

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Can add show up on a eeg?

Can add show up on a eeg?

NO: Add or adhd is neurobehavioral and biochemical disorder and diagnosed clinically. Eeg will not show any features of add.However, egg can rule out conditions such as absence seizures that can present as staring spells. Egg is not needed for diagnosis of add. ...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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How does the EEG test work?

Records brain: Electrical activity occurs thruout the body, and like an electrocardiogram recording heart activity, small discs are taped to specific areas of the scalp, and pickup underlying electrical impulses from brain activity. The rhythms vary during sleep and waking, and are compared to normal expectations. Diffuse slowing may correlate with diffuse problems, and paroxysmal activity may indicate seizure. ...Read more

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What is the point of an eeg?

Uses of an EEG: An EEG is normally used to help determine the cause and likelihood of a person to have a seizure. In the hospital, the EEG is sometimes used to help determine the cause of altered consciousness. ...Read more

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Will it show up if I smoke on eeg?

Will it show up if I smoke on eeg?

EEG: Measures the electrical activity of the brain. Various drugs when taken in larger does can cause changes in a patient's eeg. Usual doses of nicotine will likely not cause eeg changes. ...Read more

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How much time does an EEG test take?

About an hour : A routine eeg takes half an hour, but there is additional time needed to put on and take down the electrodes. That being said, sometimes we will run studies for longer time periods (days at a time) in hopes of capturing a rare event. ...Read more

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When should I ask for results from my eeg?

When should I ask for results from my eeg?

Results: The results of an eeg may be available the next day to several days, after being read by a neurologist. ...Read more

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Could you tell me what happens during an eeg?

Could you tell me what happens during an eeg?

EEG: To begin, the technician will paste wires with metal cups, to your skull, using an electrolyte paste. The wires serve as antennas, picking up the electrical activity of your brain cells. You will then be asked to lie down on a table. Once the machine is on, it does all the work. You may have light flashed at your eyes and you may be asked to try and go to sleep. You will not feel anything. ...Read more

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What is the definition or description of: eeg?

What is the definition or description of: eeg?

Electroencephalogram: 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. ...Read more

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What is a delta rhythm in electroencephalogram?

What is a delta rhythm in electroencephalogram?

Slow brain activity: Delta rhythm is 0-4 hz activity in the brain seen on eeg. It is normally seen in deep sleep or in patients with brain disease, either focal (tumor, stroke) or generalized (intoxication, dementia). ...Read more

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What is a normal reaction to an EEG strobe test?

What is a normal reaction to an EEG strobe test?

Electrical activity: The strobe testing (aka "photic stimulation") normally causes either no response or a brief synchronized symmetric response in the visual areas of the brain. Abnormal responses include asymmetry or prolonged activity ("a photoconvulsive response"). ...Read more

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What should I do to prepare myself for EEG study?

Nothing to do: there is no need to prepare for an EEG. Don't take any medications that you don't normally take. ...Read more

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