PS101 Lecture Notes - Lecture 5: Lucid Dream, Circadian Rhythm, Theta Wave
Document Summary
Consciousness awareness of internal and external stimuli. Thought without attention good for decision making. Biological clock: light retinal receptors scn pineal gland releases melatonin. Disruptions to the 24hr cycle: lack of sleep, jet lag, shift work. Stage 1 sleep theta waves, drifting, easily awakened, breathing slow, muscles twitch, lucid dreaming. Stage 2 sleep sleep spindles and mixed eeg activity, if awoken, won"t remember being asleep. Slow wave (stage ) sleep progressively more delta waves, deep breathing, muscles relaxed, stage where sleep walking occurs. Partial: cognitive deficits, amygdala activity increases, but prefrontal cortex activity, cortisol is sustained, organs decline, hunger increases and decreases obesity increases. Selective: deprived of rem body seeks out more rem if deprived, memory consolidation occurs in rem, neurogenesis occurs in rem. Sedatives work on the inhibitory neurotransmitters, but they are addictive, they have carry-over effects, and decrease deep sleep. Cognitive-behaviour therapy restricting the bed for sleep and sex only. Narcolepsy: sudden onset of sleep during wakefulness, causes.
