Which device would a sleep researcher use to monitor a sleeping person's brain waves?
A) electromyograph (EMG)
B) electrocardiograph (EKG)
C) electro-oculograph (EOG)
D) electroencephalograph (EEG)

Question

Which device would a sleep researcher use to monitor a sleeping person's brain waves?
A) electromyograph (EMG)
B) electrocardiograph (EKG) 
C) electro-oculograph (EOG)
D) electroencephalograph (EEG)

Quizplus · Accepted Answer

An electroencephalograph (EEG) is a device that measures electrical activity in the brain and is commonly used in sleep research to monitor brain waves during sleep. The other devices listed measure muscle activity (EMG), heart activity (EKG), and eye movements (EOG), which may also be monitored during sleep research but are not specific to monitoring brain waves.

Which Device Would a Sleep Researcher Use to Monitor a Sleeping