Types of Rhythms
Circadian: about 24 hoursUltradian: less than 24 hours
Core Body Temperature
Variation is related to:
Alertness Jet lag
Zeitgeber: time cueFree run rhythm about 25 hours
Pineal Gland
Secretes Melatonin
Amount affected by:Light (suppression)Magnetic fields
90 Minute Cycles
Cerebral dominance mental rotation fantasy
Stages of Sleep – Awake, alertStages of Sleep – Awake, alert
EEG Recording
Beta waves
Based on Hauri, 1982
Stages of Sleep – Relaxed, drowsyStages of Sleep – Relaxed, drowsy
EEG Recording
Alpha waves
Based on Hauri, 1982
Stages of Sleep – Stage 1Stages of Sleep – Stage 1
EEG Recording
Theta (6 CPS)
Based on Hauri, 1982
Stages of Sleep – Stage 2Stages of Sleep – Stage 2
EEG Recording
Sleep Spindle
Based on Hauri, 1982
Stages of Sleep – Stage 3Stages of Sleep – Stage 3
EEG Recording
Delta (1 CPS)
Based on Hauri, 1982
Stages of Sleep – Stage 4Stages of Sleep – Stage 4
EEG Recording
Delta (1 CPS)
Based on Hauri, 1982
Sleep Disorders
InsomniaNarcolepsyApnea