PSYC 1F90 Lecture Notes - Lecture 5: Hypnagogia, Gesture, Non-Rapid Eye Movement Sleep
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PART III: Personality - We Are Each Uniquely
Sleep and Dreams
Why are Sleep & Dreams worth studying?
Common phrases associated with sleep and dreams:
o"just a dream"
These all suggest that dreaming is something simple, and uneventful
We spend 1/3 of our life asleep. It is a huge part of our life, wo why
WOULDN’T we study it!
It is an extremely active period for the brain, but also a very dangerous time.
Most people die in their sleep.
oEx. Babies die in their sleep, the elderly, etc.
Dreams are yours, and can be extremely signi8cant.
oThey hold a mirror up to who you are
oDreams happen in sleep so a good understanding of sleep is needed.
Tour of sleep
What do we measure to study sleep?
EEG (electroencephalogram) - electrical activity
Frequency and amplitude
Frequency: the number of waveforms that occur in a period of time
Amplitude: the height from lowest to highest point in waveform
Neurons: sells creatures they are living! They work, rest, living communities,
electrical, chemical, magnetic, there are billions and billions of them, a mini
universe of them.
oHow do frequencies and amplitude relate? Revisiting the neuron…
High capital F and low A = Constant buzz
Low F and High A = highs and lows, like coordinated singing
Measuring on movement/activity
Asked broad questions" what is going through your mind"
Woken up and asked at various levels of sleep
Dreaming the whole time
Don't remember eight hours of cognition
Stage 1 (Non– REM or NREM)
oSlowing, looks a lot like an awake brain, slightly higher amplitude