PS101 Lecture Notes - Ultradian Rhythm, Circadian Rhythm, Sleep Spindle
Document Summary
Eye light and dark send messages to receptors in your eye which sends a message to the scn. Suprachiasmatic nucleus sends a message to the brain and the body to start releasing hormones. Sleep stages (ultradian rhythm, they are 90 minutes and you will have many of them throughout the night depending on how much you sleep. ) If you are woken, you won"t remember being asleep. We spend more time at this stage when we are older than younger. We think sleep spindles are for the brains understanding for muscle activity and/or memory consolidation. Sleep walking, talking, eating occurs during these stages of 3 or 4. Dreams are remembered during the 90 minute period before and between rem sleep. Brain waves are similar to the awake waves: paralysis hormone (no sleepwalking, heart rate increases, rapid eye movements, genitals are active, babies spend more time in rem than older adults.
