sleep researchers who are interested in brain wave activity are likely to use which kind of brain scan?

Sleep researchers who study brain wave activity are most likely to use an electroencephalogram, or EEG.

EEG measures the brain’s electrical activity in real time using electrodes placed on the scalp, which makes it ideal for tracking the changing patterns of brain waves during different stages of sleep. Other scans like MRI, fMRI, CT, or PET are useful for structure or blood flow, but they do not capture rapid, moment‑to‑moment brain wave changes as effectively as EEG does.