PSY372H1 Study Guide - Sleep Spindle, Synaptic Weight, Sleep Deprivation
Document Summary
Sleep = altered state of consciousness; being in coma, anesthetic; don"t involve external stimuli; can be woke up by whispering your name but not the truck since your name is meaningful to you. Dream: most people report no dreaming exp because we forget the content of dream. As of 2008, the american academy of sleep medicine (aasm) has discontinued the use of stage 4, such that the previous stages 3 and 4 now are combined as stage 3. Awake: beta-activity = brain activity in bed when trying to sleep; when you"re awake, beta-activity has the highest frequency but lowest amplitude; starts to slow down as you try to sleep. Nrem stage 2: a sleep spindle is a burst of oscillatory brain activity visible on an eeg that occurs during stage 2 sleep. Sleep spindles may represent periods where the brain keeps the sleeper in a tranquil state.
