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Lecture 7

PSYC 100 Lecture Notes - Lecture 7: Jet Lag, Sleep Deprivation, Polysomnography


Department
Psychology
Course Code
PSYC 100
Professor
Jordan Poppenk
Lecture
7

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Consciousness
Consciousness- a person’s awareness (thoughts, perception, experience)
Sleep
Circadian rhythms- daily cycle that affect physiological and behavioural processes
Entrainment- when these rhythms sync with the outside world- temp, light, or even a clock
Endogenous rhythms- when biological rhythms are independent from the outside world
Polysomnography- examining physiological variables during sleep
REM sleep (paradoxal sleep)-
stage of sleep where brain waves
quicken, causing body movements
and rapid eye movements
Sleep deprivation- when someone
is unable to sleep
Sleep displacement- when
someone is prevented from
sleeping at a normal time
Jet lag- discomfort a person feels when their sleep cycles are out of sync with light and
darkness
Why do we sleep?
Restore and repair hypothesis- body needs to repair and restore its energy
Preserve and protect hypothesis- we sleep to preserve energy and protect our body from
harm
- Animals may do this
Theories of Dreaming
Manifest content- images and storylines in dreams
Latent content- symbolic meaning of a dream (based on suppressed sexual/aggressive urges)
Activation-synthesis hypothesis- dreams arise from bursts of messages from pons (brainstem)
- The brain tries to piece together these randomly activated images
Problem-solving theory- thoughts/concerns are continuous from wake to sleep and dreams
are the brain’s way of attempting to solve problems encountered when awake
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