PSYC 100 Lecture Notes - Lecture 11: Brainstem, Circadian Rhythm, Sleep Deprivation
4 Jun 2018
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PSYC 100 – Lecture 11
Consciousness
Wakefulness & Sleep
• Consciousness is ’ , l ,
perceptions, experiences of the world, and self-awareness
• Biological rhythms
o Circadian rhythms are internally driven daily cycles of approximately 24
hours affecting physiological and behavioral processes
▪ Entrainment: when biological rhythms become synchronized to
external cues such as light, temperature, or even a clock
o Endogenous rhythms: biological rhythms that are generated by our body
independent of external cues such as light
• Stages of sleep
o Polysomnography: a set of objective measurements used to examine
physiological variables during sleep
• Theories of sleep
o Restores and repairs hypothesis: the idea that the body needs to restore
ll ’
activities
o Preserve and protect hypothesis: suggests that two or more adaptive
functions of sleep are preserving energy and protecting the organism from
harm
• Sleep deprivation & sleep displacement
o Sleep deprivation: occurs when an individual cannot or does not sleep
o Sleep displacement: occurs when an individual is prevented from sleeping
at the normal time although he or she may be able to sleep earlier or later
in the day than usual
find more resources at oneclass.com
find more resources at oneclass.com
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PSYC 100 Full Course Notes
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