PSY-102 Lecture Notes - Lecture 4: Jet Lag, Sleep Paralysis, Suprachiasmatic Nucleus
Document Summary
State of being unable to move just after falling asleep or right before waking up. Our circadian rhythm is cyclical biological changes that occur on a 24 hours basis. Regulated by suprachiasmatic nucleus or biological clock of the hypothalamus. Jet lag and late shifts can cause health problems. People with dec2 mutation- 6 hours or less. Can cause: weight gain, depression, decreased immune system. Stages 1-4 is non-rem sleep: no eye movement, fewer dreams. Stage 5 is rem sleep: vivid dreams and quick eye movements. Stage 1: 5-10 minutes, hypnagogic imagery, theta waves. Stage 2: 10-30 minutes, sleep spindles and k complexes, 65 % of total sleep. Stage 3 and 4: 15-30minutes, delta waves, crucial to feel rested, suppressed by alcohol. Stage 5: 10-20 minutes, rem sleep, brain activity similar to wakefulness, becomes longer as the night goes on. Paradoxical because our bodies are paralyzed but brains are active. Rem rebound occurs when we don"t rest well for several nights.
