Psychology 101 Sleep lecture

How long does a full sleep cycle last?

90 minutes

What part of the brain is bombarding the cortex with random signals during REM sleep?

Amygdala

What is Recuperative theory?

Animals sleep in order to provide time for the body to repair itself

What sorts of brain waves are observed in NREM1 sleep?

Brain waves get slightly larger

What are the two theories explaining why animals need to sleep?

Circadian theory and recuperative theory

What sort of machine is used to measure brain waves?

Electroencephalogram (EEG)

What did Freud believe was the function of dreams?

He believed he contained symbols that revealed the unconscious mind

In what stage of sleep do night terrors occur?

In Stage 3

What sorts of waves are observed in REM sleep?

Looks like stage one waves

What sort of stimuli can awaken someone in REM sleep?

Meaningful stimuli (such as hearing their name)

What is the evidence for Recuperative theory?

Mentally taxing days produce more NREM3 sleep

During what stage of sleep does a male's penis become erect and a female's vaginal lubrication increase?

REM sleep

What will people report doing when awakened from REM sleep?

Report dreaming

What is Circadian theory?

Sleep has evolved to keep animals inactive during times of the day when they do not need to be active

In what stage of sleep do sleep spindles appear first?

Stage 2

What is the evidence for Circadian theory?

The amount of the time animals spend sleeping can be manipulated by manipulating the time of the dark-light cycle

Why don't people remember most of their dreams?

The hippocampus is suppressed during dreaming

What part of the brain paralyzes the body during REM sleep?

The pons

What is the function of sleep spindles?

They are thought to reduce the brains sensitivity to sensory input

How will people in NREM 3 feel when awakened?

They will feel groggy

What sorts of brain waves are observed in NREM3 sleep?

Waves are the slowest. They are called delta waves

What sorts of brain waves are observed in NREM2 sleep?

Waves get slower. They are called theta waves

What is the Activation-Synthesis theory?

Why dreams occur

Can external stimuli be incorporated into dreams?

Yes

Do people perceive time accurately during dreams?

Yes

What are the effects of deprivation of NREM3 and REM sleep on memory?

harms long term memory consolidation