Journal of Neuroinformatics and Neuroimaging

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Commentary - Journal of Neuroinformatics and Neuroimaging (2021) Volume 6, Issue 1


An Electroencephalogram (EEG) is a test that uses small metal discs (electrodes) connected to your scalp to detect electrical activity in your brain. Even when you're sleeping, your brain cells communicate with each other via electrical impulses. On an EEG recording, this activity appears as wavy lines. The electrical activity of the cortex, the outer layer of the brain, is recorded during EEG. The transmission of electricity created by the cortex is captured by electrodes on the scalp, which are then recorded on a computer, thanks to a conductive gel containing salt and electrolytes. The study of event-related potentials is one technique to analyse EEG data. An ERP is a specific neural response elicited by the brain in response to a specific event. ERP waveforms are easily detectable changes in the EEG signal that occur at the same time as a specific event, and can be used to time lock brain activity to a variety of cognitive and behavioural activities.

Author(s): Shawn Kruger

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