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Evolution of the Electronic Recorder
Basic Electrical Concepts
8 other sections not shown
1-35 Hz Figure 60 cycle filter Amer J EEG amplitude asymmetry atom attenuation battery bipolar combinations brain capacitors charge circuit common reference connected current flow decreased device differential amplifier diffuse dipole direct current ear contamination ear reference EEG machine EEG Technol EKG artifact elec Electroenceph clin Neurophysiol electroencephalograph equipment frequency response Frequency response curves frontal frontal pole galvanometer HERTZ high voltage Hz will show increased indicated infra-orbital input signal input voltage jjV 0 jjV LLF control LLF switch measurement mid-temporal mm/sec monopolar montage montage as Figure movement muscle artifact occipital occur ohmmeter out-of-phase relationship output parasagittal peak pen deflection phase reversal polarity positive potential present produce reduced reference electrode resistance resistors respect to Grid scalp electrodes scalp leads sensitivity switch sensitivity value setting slow wave pattern step input summation technique temporal area transistor vacuum tube vertex wave form wire WWWW