Unit 5 States of Consciousness Biological Rhythms and Sleep Circadian Rhythm regulates bodily rhythms including temp and sleep over 24 hr cycle Ultradian Infradian Thinking and memory sharpest at YOUR daily peek ID: 933863
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Slide1
Module 23 Sleep Patterns and Sleep Theories
Unit 5 States of Consciousness
Slide2Biological Rhythms and Sleep
Circadian Rhythm:
regulates bodily rhythms including temp and sleep over 24
hr cycleUltradianInfradianThinking and memory sharpest at YOUR daily peekAltered by age and experiencesOwls and Larks
Slide3Sleep Stages
90 minute cycles with 4 distinct stages
Measure changes in sleep stages using EEG on scalp, chin, corner of eyes
Alpha Waves: slow, when you’re awake but calm
Beta Waves: awake and alertSleep: natural loss of consciousness
Slide44 Stages of Sleep
NREM-1: twilight sleep, slowed breathing irregular brain waves. Lasts a few minutes.
Can have
hallucinations: false sensory experiences (sense of falling)Also known as hypnagogic sleepCan be incorporated into memoriesNREM-2: lasts about 20 minutes
See sleep spindles: rapid, rhythmic brain waves Can be easily awakened but are asleep
Slide5Slide64 Stages Cont.
3.
NREM-3: lasts about 30 min.
Deep sleep, delta waves4. REM: contains most vivid dreams.Paradoxical: brain looks like it’s awake but muscles are relaxedHeart rate increases, rapid breathing, eyes dart, genital arousal=beginning of dreamsActive motor cortex but brainstem blocks messagesSleep paralysis
Slide7Slide8Stages Cont.
Hour into cycle, you go back down the cycle
NREM-1
NREM-2 NREM-3 NREM-2 REM Spend half of the night’s sleep in NREM-2At 90 minutes, NREM-3 grows shorter and
disappears20-25% in REM sleep each night
Slide9What Affects Our Sleep Patterns?
Genetically and culturally influenced
Bright lights “
tweak” circadian rhythmsSuprachiasmatic nucleus (SCN): in hypothalamus causes pineal gland to decrease melatonin due to light
Slide10Sleep Theories
5 Reasons for Sleep
Protects
RecuperativeRestore/Rebuild memoriesCreative Thinking Growth