Electroencephalography : Basic Principles, Clin... [ VALIDATED ]

: EEG measures the collective electrical activity of about 100,000 neurons, which create recordable voltage differences at the scalp.

: Electrodes are typically placed according to the International 10-20 system, with "montages" used to compare signals across different brain regions (e.g., frontal, temporal, parietal). Standard Brain Wave Patterns EEG (electroencephalogram) - Mayo Clinic

: Discernible waveforms are generated by measuring the voltage difference between two electrode sites using a differential amplifier.

Electroencephalography (EEG) is a non-invasive diagnostic technique that records the brain's spontaneous electrical activity through electrodes placed on the scalp. This activity is generated by the synchronous firing of neurons, specifically the summation of postsynaptic potentials.