A client with depression tells a nurse, "I have a test that involves the recording of an electroencephalogram (EEG) throughout the night." The nurse most likely identifies this as what type of testing?

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Polysomnography is a special procedure that involves recording an EEG throughout a night of sleep. A sleep-deprivation EEG involves keeping a client awake the night before the EEG evaluation. Evoked potentials measure changes in electrical activity of the brain as a response to a given stimulus. Functional magnetic resonance imaging creates images of changes in blood flow.

A Client with Depression Tells a Nurse, "I Have a Test