Final answer:
EEG is used to monitor during ECT to understand the overall activity of the brain, providing information on brainwaves and assisting in the diagnosis of disorders.
Step-by-step explanation:
Electroencephalography (EEG) is used to monitor during Electroconvulsive Therapy (ECT) to gain an understanding of the overall activity of the brain. EEG measures the brain's electrical activity by placing an array of electrodes around a person's head.
It provides information on the frequency and amplitude of brainwaves, which is helpful for researchers studying sleep patterns and diagnosing disorders such as seizures.