Electroencephalography could be a technique for watching electrical activity within the brain. It uses electrodes placed on or below the scalp to record activity with coarse abstraction however high temporal resolution. graphical record may be utilized in psychological feature analysis or to diagnose conditions like encephalopathy
and sleep disorders. Electroencephalography (EEG) is Associate in Nursing
electrophysiological watching technique to record electrical activity of the brain. it's usually noninvasive, with the electrodes placed on the scalp, though invasive electrodes ar generally used, as in electrocorticography. graphical record measures voltage fluctuations ensuing from ionic current among the neurons
of the brain. Clinically, graphical record refers to the recording of the brain's spontaneous electrical activity over a amount of your time, as recorded from multiple electrodes placed on the scalp. Diagnostic applications usually focus either on event-related potentials or on the spectral content of graphical record. the previous investigates potential fluctuations time fastened to an incident, like 'stimulus onset' or 'button press'. The latter analyses the sort of neural oscillations (popularly known as "brain waves") which will be ascertained in graphical record signals within the frequency domain.
EEG is most frequently wont to diagnose encephalopathy, that causes abnormalities in graphical record readings. it's conjointly wont to diagnose sleep disorders, depth of physiological state, coma, encephalopathies, and death. graphical record wont to be a first-line technique of diagnosing for tumors, stroke
and different focal brain
disorders, however this use has small with the appearance of high-resolution anatomical imaging techniques like resonance imaging (MRI) and CAT (CT).
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