What Is an EEG (Electroencephalogram)? An EEG, or electroencephalogram, is a test that records the electrical signals of the brain by using small metal discs (called electrodes) that are attached to ...
Snugged up against the scalp, electrodes can eavesdrop on the brain’s electrical activity. But the signals can weaken when electrodes can’t get close enough to the scalps of people with coarse, curly ...
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