What is the difference between electroencephalogram and electroencephalography?

What is the difference between electroencephalogram and electroencephalography?

is that electroencephalogram is (neurology) a recording of electrical brain activity (brain waves) made by an electroencephalograph while electroencephalography is (neurology) the measurement and recording of electrical activity in the brain for diagnostic purposes.

What can electroencephalography diagnose?

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.

Can an abnormal EEG become normal?

A normal EEG does not mean that you did not have a seizure. Approximately one-half of all EEGs done for patients with seizures are interpreted as normal. Even someone who has seizures every week can have a normal EEG test. This is because the EEG only shows brain activity during the time of the test.

How do you know if your EEG is abnormal?

Abnormal EEG signals include little electrical “explosions” such as the spikes, spike and wave, and sharp waves that are common in Epilepsy even when children are not in the midst of a clinical seizure. Indeed, the EEG is usually done in the interictal state-the time in between clinical seizures.

Can you have an abnormal EEG and not have seizures?

To complicate this further, some people have ‘abnormal’ EEGs but do not have epilepsy. Also, many people who do have epilepsy will only have ‘abnormal’ activity on the EEG if they have a seizure at the time the test is happening.

Why is there electrical activity in the brain?

Electrical activity is used in the brain in order to fire electrical impulses to communicate with each other. Neurons use electrical signaling to receive and send information. When a neuron is stimulated, an action potential is fired, which enables the message signals to travel rapidly down the axon terminal.

Can you have an abnormal EEG without having epilepsy?

How do some drugs affect the electroencephalogram (EEG)?

How some drugs affect the electroencephalogram (EEG). The effects of drugs on the EEG vary and are often dose dependent. In general, drugs effects on the EEG are fairly predictable and include: no effect, accentuation of beta activity, background slowing with decreased amplitude and/or frequency of the alpha rhythm,…

What does the electroencephalogram EEG measure?

EEG also has some characteristics that compare favorably with behavioral testing: EEG can detect covert processing (i.e., processing that does not require a response) EEG can be used in subjects who are incapable of making a motor response Some ERP components can be detected even when the subject is not attending to the stimuli

How many electrodes does an EEG need?

Current EEG systems can have as few as four electrodes [11] or as many as 256 electrodes. Until recently, the use of EEG has been limited to stationary settings (i.e., settings where the subject is seated or prone) because of the susceptibility of EEG electrodes to movement and electromyographic artifacts [12-14].