PSY 201 Lecture Notes - Lecture 3: Sleep Deprivation, Sleep Spindle, Sleep Disorder
Document Summary
Consciousness: the subjective experience of perceiving oneself and one"s surroundings. We are conscious of things we can report. Only way to measure how conscious someone is, is to ask them and have them describe it. Alter states of consciousness: (different awareness than one is in a regular state) Use eeg (electroencephalogram) to measure brain activity. Still have some sort of natural state of conscious. Ex: wake up when a baby cries, wake up when the light turns on. Most adults need 7-9 hours of sleep/night. 5 stages: sleep cycle rotates in 90 minute cycles: transition from wakefulness to sleep, brief burst of brain activity, deeper sleep, deeper sleep, rem sleep. Ex: feeling yourself falling & leg shoots out. 10 minutes: brief burst of brain activity (sleep spindles) Sleep spindles: burst of oscillatory brain activity visible on an eeg. Sleep spindles are generated in the reticular nucleus of the thalamus. Heart rate, temp, breathing decrease to their lowest points.
