The __________ monitors brain waves and can be used to teach people how to produce alpha waves, which are associated with relaxation.

A) coronagraph
B) heliograph
C) phonocardiograph
D) electroencephalograph

Electroencephalograph

A device used to record the electrical activity of the brain, often used in the diagnosis and monitoring of neurological conditions.

Brain Waves

Patterns of electrical activity in the brain, measurable by EEG, that reflect different states of consciousness or mental activities.

Alpha Waves

Rapid low-amplitude brain waves that have been linked to feelings of relaxation.