Neuroscience Sleep Stages Quiz

What tool is used to measure electrical activity in the brain to define sleep stages?

• Positron Emission Tomography (PET)

• Magnetic Resonance Imaging (MRI)

• Electroencephalogram (EEG)

• Electrocardiogram (ECG)

How many stages of sleep are classified by the American Academy of Sleep Medicine?

• 3 stages

• 5 stages

• 2 stages

• 4 stages

Which stage of sleep is characterized by low-amplitude waves of mixed frequencies?

• Stage 2

• Stage 1

• REM sleep

• Stage 3

What phenomena are present on an EEG during stage 2 sleep?

• Theta waves

• Sleep spindles and K complexes

• Alpha waves

• Delta waves

What are sleep spindles?

• Biphasic waves

• Trains of high-frequency waves

• Mixed-frequency waves

• Low-frequency waves

What is another name for stage 3 sleep?

• REM sleep

• Slow-wave sleep

• Drowsiness

• Light sleep

What type of waves make up at least 20% of brain activity in stage 3 sleep?

• Alpha waves

• Beta waves

• Delta waves

• Theta waves

During which stage of sleep are the muscles completely relaxed and limp?

• Stage 2

• REM sleep

• Stage 3

• Stage 1

When are our most vivid dreams likely to occur?

• Stage 1

• Stage 2

• Stage 3

• REM sleep

How many times do most people repeat the sleep cycle in a night?

• 2-3 times

• 5-6 times

• 3-4 times

• 4-5 times