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An EEG cap, or electroencephalogram cap, is a medical device used to measure and record the electrical activity of the brain. The cap is typically made of elastic material and is equipped with electrodes that are strategically placed across the scalp according to the international 10-20 system. This system ensures standardized electrode placement for consistent and accurate measurements.

The electrodes in the EEG cap detect the electrical signals generated by the brain's neurons. These signals are then amplified and recorded by an EEG machine. EEG is a valuable tool in neurology and clinical medicine, helping to diagnose various neurological disorders, study brain function, and monitor brain activity during certain tasks or conditions.

EEG caps are often used in research, clinical settings, and sometimes in home environments for monitoring brain activity. They are non-invasive and provide real-time information about brain electrical activity, making them a useful tool in the field of neuroscience and neurology.

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