Consciousness & Sleep Day 1 Notes

Awareness of everything going on within ourselves and our surroundings

onsciousness

FREUD’S THEORY OF CONSCIOUSNESS

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# 1

# 2

# 3

Hold up the number of fingers (1, 2, or 3) which best represents the preconscious mind.

BODILY RHYTHMSCircadian Rhythm– A biological rhythm of Sleep, Alertness, and Body

Temperature changes– 24 Hour sleep/wake cycle – Alertness slowly increases until around noon and then decreases until a dip around 3pm, rises

and peaks again around 6pm, then decreases slowly until around 3am and then gradually increases throughout the morning.

Rhythms:– Jet lag can mess with rhythms– Bright light can reset our natural

“clock”

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Did you know?If all light cues and clocks are hidden,

we will adapt to a 25-hour day

Necessity of Sleep• Circadian rhythm

– 24 hour bodily rhythm

• Hypothalamus – tiny section of brain influences glandular system

• Suprachiasmatic nucleus –internal clock tells people wake up/fall asleep

• tells pineal gland secrete melatonin for sleepiness

4.2 Why do people need to sleep and how does it work?

Theories of WHY We Sleep

• Animals evolved sleep patterns to avoid predators by sleeping when predators are most active

Adaptive theory - theory of sleep proposing that animals and humans evolved sleep patterns to avoid predators by sleeping when predators are most active.

Restorative theory - theory of sleep proposing that sleep is necessary to the physical health of the body and serves to replenish chemicals and repair cellular damage.