Which of the following methods of studying the brain records the brain's electrical activity by placing electrodes on the scalp to detect brain-wave activity?

A) electroencephalograph (EEG)
B) positron emission tomography (PET)
C) magnetic resonance imaging (MRI)
D) functional MRI (fMRI)

Electroencephalograph

A device used to record electrical activity of the brain, commonly called an EEG, used in neurological diagnosis.

Brain-Wave Activity

The patterns of electrical activity in the brain, measurable by electroencephalography (EEG), associated with different states of consciousness.

Electrodes

Conductors through which electricity enters or leaves an object, substance, or region, often used in medical and research settings to measure electrical activity.