Multiple choice general knowledge science & technology

Which instrument can register whether a person is dreaming or not?

  1. ECG

  2. EEG

  3. PGO

  4. REM
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

EEG (electroencephalogram) records brain electrical activity and can identify REM sleep patterns, which is when most dreaming occurs. ECG measures heart activity, PGO waves are specific neural patterns (not an instrument), and REM is a sleep stage, not a measurement tool.

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