Understanding Sleep and Dreams: Stages, Patterns, and Theories - Prof. Constance Pilkingto, Study notes of Psychology

Download Understanding Sleep and Dreams: Stages, Patterns, and Theories - Prof. Constance Pilkingto and more Study notes Psychology in PDF only on Docsity! Altered states 10/27 10/27/2009
III. Sleep  A. Circadian rhythm o 1. Wake sleep cycle that tends to have 25 hr period 2. Produces rhythmic variations in our blood pressure, body Temperature, hormonal secretions, etc 3. Jet Lag 4. East vs West travels: easier to adjust if you travel west, explains why I’m so tired when I first arrive at school 5. Rotating shifts: keep changing schedule according to Circadian rhythm B. Stages of sleep 1. Awake a. Beta waves (small and fast) b. Pre-sleep ( waves slow down and get larger, transform to alpha waves 1. Alpha waves body temperature drops, body slows down 2. hypnagogic sleep Sensitivity to external stimuli decreases. Thoughts become more fanciful, less reality bound 3. Myoclonia (when the body suddenly jerks and you wake up) 2. Stage 1 sleep (light sleep, brain waves slow down even more) a. Theta waves: low amplitude, irregular breathing slows down further, muscles relax even more 3.Stage 2 Sleep (still have theta waves) a. spindles (rapid, short period of bundled waves together that have a greater amp.) b. K-complex: low freq., but amp high stimulation can come from external sources 4. Stage 3 sleep (has Delta waves) 5. Stage 4 sleep (still has the delta waves) happens about a 30 minutes of sleep 6. REM sleep (rapid eye movement) 90 minutes after first falling asleep Brain waves are very similar to stage 1 7. NREM vs REM a. ‘free’ movement relatively in non REM b. Rem sleep is rather immobile (skeletal muscles become limp) A. low steady blood pressure in NREM B. high BP, irregular in REM a. similar phenomena happens with heart rate and breathing e. NREM easier to wake usually 10/27/2009
10/27/2009