A test that uses electrodes placed on the scalp to record electrical brain activity It is often used to diagnose seizure disorders or to look for abnormal brain wave patterns
recording through the scalp of electrical potentials from the brain and the changes in these potentials The EEG is one of the three basic variables (along with the EOG & EMG) used to score sleep stages and waking Surface electrodes are used to record sleep in humans, recording potential differences between brain regions and a neutral reference point, or between brain regions
An electroencephalogram is a device which records the electrical activity from different parts of the brain and converts it into a tracing called an electroencephalogram or EEG The machine that records this activity is known as an encephalograph The pattern of the EEG reflects the state of the patient's brain and the level of consciousness in a characteristic manner A recording of the electrical impulses of the brain can be used to diagnose certain diseases (such as epilepsy), furnish information regarding sleep and wakefulness, and confirm brain death
A test that can detect and record the brain's electrical activity The test is done by pasting metal disks, called electrodes, to the scalp
A graphic recording of electrical currents developed in the cerebral cortex during brain functioning; a machine called an electroencephalograph records the pattern of these electrical currents on paper