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Psych U5M23
sleep patterns and theories
| Question | Answer |
|---|---|
| circadian rhythm | biological clock that regulates body rhythms |
| suprachiasmatic nucelus (SCN) | in the hypothalamus; clustered cells that controls circadian rhythm (melatonin; in response to light) |
| 2 examples of circadian rhythm;s influence on people | body temp, thinking |
| sleep | natural loss of consciousness; different than coma, anesthasia |
| in what ways is sleep activity measured? and what sleep stages are measured? | studied using the EEG to detect brain waves (beta/alpha/theta/delta), the 3 NREM stages of quiet sleep, and the active stage of sleep, REM. |
| NREM | non-rapid eye mvmt sleep; quiet sleep (that covers all sleep stages expect for REM) |
| beta waves | short, quick waves; awake and alert (14-25 CPS) |
| alpha waves | slow brain waves of a relaxed, falling to sleep state (8-12CPS) |
| theta waves | appear in the lightest stage of sleep (NREM1-2) 4-7 CPS |
| sleep spindles/ K complexes | sleep spindles=bursts of rapid brain activity, K complex=higher amplitude waves (from picking up environmental stimuli) |
| delta waves | the large, slow brain waves associated with deep sleep. |
| paradoxical sleep | the body is functioning but externally, we are asleep and calm |
| suprachiasmatic nucelus (SCN) | production of melatonin is influenced by the amount of light |
| what are the 4 sleep theories | sleep helps us regenerate, restore memories, creative thinking, supports growth |
| how is sleep related to athletic performance? | more sleep=faster reactions, more energy better teamwork |
| describe brain activity before sleeping | awake and alert; beta waves are short and quick (14-25 CPS) |
| describe the 1st sleep stage | falling to sleep; alpha waves (8-12CPS); everything relaxes -you may twitch to wake up (like in class) or be hypnagogic (visual images) |
| describe the 2nd sleep stage | NREM-1 lightest stage of sleep; theta waves; dreamike images; lasts for 30-40 mins |
| describe the 3rd sleep stage | NREM-2 still theta waves; brainwaves fluctuate btwn high/low voltages which form the K complex and sleep spindles; 10-15 mins |
| describe the 4th sleep stage | NREM-3 the slowest waves: delta waves (under 4 CPS); deepest stage of sleep that is important for our physical/mental heath; night terrors |
| describe the 5th sleep stage | after sleeping for 90 mins, you go back to emergent 1; beta waves; sleep paralysis |
| REM sleep | rapid eye mvmt sleep characterized by irregular breathing, rise in blood pressure and heart rate |
| paradoxical sleep | we are internally aroused but externally calm (muscles are limp so that they cannot move while at rest) |
| how does paradoxical sleep happen? | the pons block messages from the brain to move your muscles??muscles are paralyzed |
| in what stage does sleep mostly take place? | REM sleep |
| how many cycles of sleep are in a typical night of sleep? how many hours in a typical night of sleep? | 5 cycles; 8 hours |
| as the night goes on, what stages of sleep get longer and shorter? | REM sleep is longer, stage 3 sleep is shorter |
| 3 reasons to sleep | recuperate: revive energy, protect: not waste energy trying to protect from predators, promote growth: boost creative thinking, restore memories |
Created by:
allyson.lee
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