A doctor has suggested that Dwayne should undergo a sleep study to determine why he is having difficulty sleeping. When Dwayne arrives at the study, the doctors use a(n) _____ to measure his brain waves as he sleeps.

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An EEG (electroencephalogram) measures brain waves and is commonly used in sleep studies to assess the stages of sleep and diagnose sleep disorders. PET (positron emission tomography) and fMRI (functional magnetic resonance imaging) are imaging techniques used to visualize brain activity during various tasks or conditions, but they are not commonly used in sleep studies. EOG (electrooculogram) measures eye movements and is used in sleep studies to identify different stages of sleep based on eye movement patterns. However, it does not measure brain waves like an EEG.

A Doctor Has Suggested That Dwayne Should Undergo a Sleep