Answer: a. electroencephalography
Explanation:
The electroencephalogram is a test that is used to check and examine the activity of the brain. It tracks and records the electrical brain wave activity. This involves the attachment of the metal disc on the scalp and sends the signals to the computer to record the results of the brain activity.
This technique is useful for the diagnosis of epilepsy, sleep disorders, coma, anesthesia and all brain related disorders can be diagnosed through electroencephalogram.
The given situation indicates the use of electroencephalography according to the technique used.
