Coin-shaped electrodes are pasted onto Miranda's scalp, and they are connected by wires to a machine that translates the electrical energy from her brain into wavy lines on a monitor. From this description, it is evident that Miranda's brain is being studied with the help of:
A) positron-emission tomography.
B) functional magnetic resonance imaging.
C) transcranial direct current stimulation.
D) an electroencephalogram.

Question

Quizplus · Accepted Answer

The coin-shaped electrodes placed on Miranda's scalp and connected to a machine that translates electrical energy into wavy lines on a monitor suggest that her brain is being studied using an electroencephalogram (EEG). EEG is a non-invasive technique that measures electrical activity in the brain using electrodes placed on the scalp. Positron emission tomography (A) and functional magnetic resonance imaging (B) both provide images of brain activity, but do not use electrodes on the scalp. Transcranial direct current stimulation (C) is a technique that uses weak electrical currents delivered to the scalp to modulate brain activity, but it does not involve measuring electrical activity in the brain.

Coin-Shaped Electrodes Are Pasted onto Miranda's Scalp, and They Are