PSYCH 112 Lecture Notes - Lecture 1: Circadian Rhythm, Synaptic Pruning, Sleep Debt

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21 Oct 2015
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Sleep (Discussion notes)
- We spend approximately 1/3 of our lives asleep
oMemory storage
oImmune system functioning
oInsight and problem solving
oNeural development, neural pruning
- Circadian rhythm
oChanges that occur on a 24-hour basis
- Adults need about 7-9 hours of sleep
o“sleep debt” accumulates over time and must be paid back hour-for-hour
- Stages of sleep
oStage 1, Theta waves (small amplitude waves)
Sudden body jerks (myotonic jerks) occur here
oStage 2, sleep spindles and K-complexes (lower frequency)
oStages 3 and 4, Delta waves (very big amplitude and low frequency)
oREM (rapid eye movement) (waves look very much like wakefulness)
Becomes longer as the night goes on
When dreaming occurs
- Light is the most important determiner of sleep cycle