Answer:
Electroencephalography (EEG)
Step-by-step explanation:
EEG is an electrophysiological monitoring or an inferential measurement of brain activity.
It involves placing electrodes along the scalp and measures the voltage fluctuations resulting from ionic current within the neurons in the brain.
It is mostly used for the diagnosis of Epilepsy which is causes abnormal readings on the Electroencephalography. It can also be used to diagnose sleep disorders, coma, stroke and brain dead.