Читать книгу The Element Encyclopedia of the Psychic World: The Ultimate A–Z of Spirits, Mysteries and the Paranormal - Theresa Cheung, Theresa Cheung - Страница 288

A test that measures and records the electrical activity of the brain by using sensors (electrodes) attached to the head and connected by wires to a computer. The computer records the brain’s electrical activity on the screen or on paper as wavy lines. Certain conditions, such as seizures, can be detected by observing changes in the normal pattern of this electrical activity.

Measurements of electrical activity in the brain have been instrumental in measuring stress, determining sleep patterns and monitoring body metabolism. They have also been used to detect what happens in the brain during psychic experiences, such as meditation and episodes of clairvoyance.