What does a delta wave on an EEG scan signify?
Slow wave sleep, or non-rapid-eye-movement sleep
A painful sensation experienced during the reading
An extreme emotion, such as anger or sadness, occurring at the time of the reading
The subject is working through a problem involving math
The accessing of spatial information
In which stage of sleep do we typically dream?
Stage 4
Stage 1
REM sleep
Stage 3
Stage 2
