The Electroencephalograph is an instrument designed to record the electrical activity of the brain. Electrodes placed on the scalp pick up tiny electrical signals associated with brain activity. These signals are amplified and used to operate a pen recorder. This method of brain reading (also called an EEG) is used to detect brain abnormalities such as epilepsy. Did you know your brain frequency waves decrease when you go to sleep? It is approximately one cycle per second (1Hz) when asleep and 18 Hz when awake.
- Find out what an electroencephalogram looks like.
- What are alpha waves?
- What are delta waves?
- Write down other information you find about the electroencephalograph.
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