Many of the necessary tools, you probably already have in your tool chest. You may be working on a new roof, but it is more likely that you will be shingling a roof that already has a layer or two of shingles. If there is more than one layer you will need to remove the old shingles.
Electroencephalography definition, an instrument for measuring and recording the electric activity of the brain. See more.
Electroencephalography (EEG) Print. In electroencephalography, small metal sensors (electrodes) are applied to your scalp to record the electrical signals produced by nerve cells in the brain. The electrodes transmit this information to a machine that magnifies the electrical activity and provides a graphic representation of brain waves.