Current Diagnosis & Treatment in Neurology (Current)
Publisher: McGraw-Hill Medical
Published: September 14, 2006
Language: eng
Number of pages: 750
ISBN-13: 9780071423663
First sentence: Although brain electrical activity is very low in voltage (on the order of microvolts) in comparison with ambient noise (on the order of volts), electroencephalography (EEG) uses the technique of differential amplification to cancel out noise and increase the amplitude of the waveforms of interest.