6 Levels of Consciousness Preconscious--information not currently in consciousness but can be recalled to consciousness voluntarily or after something calls attention to it. Unconscious--mental processes that occur outside awareness.
10 Daydreaming Mild form of altered consciousness in which attention shifts away from immediate experience. Normal for all ages--especially young adults. Can help make plans and solve problems or may contain persistent unwelcome material. Not as vivid as night dreams.
12 Circadian Rhythms Physiological patterns that repeat approximately every 24 hours. A “biological clock” that influences metabolism, heart rate, body temperature, and hormone activity. Sleep-wakefulness pattern is a circadian rhythm and is influenced by light-dark cycle of day-night.
17 Sleep Cycle A repeating 90-minute cycle of changes in brain waves (4-6 times per night) Slower brain waves in deep sleep Deepest sleep during the beginning of the night Increase in REM sleep during the night