Marianne is a two-year old child and her father is interested in knowing how long his daughter stays in various stages of sleep. He is specifically interested in comparing REM sleep to slow wave sleep stages. Which of the techniques below should be used in this case?

a) electroencephalograph

b) transcranial magnetic stimulation

c) computerized axial tomography imaging

d) magnetic resonance imaging

A) Electroencephalograph

Explanation:

Electroencephalography works by recording electrical activities of the brain. Therefore, to compare REM sleep to slow wave sleep, electroencephalography is the appropriate technique to use. The electroencephalograph records the spontaneity that occurs in the brain's electrical activity over a period of time. This techique is used to monitor and diagnose disorders in sleep, anesthesia, coma, brain death, etc. It is also used to diagnose epileptic conditions.