Chapter 5.1 The biology of sleep Flashcards
Consciousness
Our subjective experience of the world our bodies and our mental perspectives
Circadian Rhythm
Cyclical changes that occur on a roughly 24 our basis in many biological processes
Biological clock
term for area of the hypothalamus thats responsible for controlling our levels of alertness, Taking a nap on noons, snooze in the night etc
Causing gene for need less sleep than normal
DEC2
REM
darting of the eyes underneath closed eyelids during sleep. Vivid dreams occur
Stage 1of sleep
light stage of sleep,5-10 minutes, brain activity powers down by 50 percent producing theta waves different from beta waves produced in alert
Hypnagogic imagery
scrambled, bizzare and dreamlike images that flit in stage 1 sleep
Sudden jerks
Our limbs as if being startled or falling in stage 1 sleep
Stage 2 sleep
Brain waves slow down even more K-comlexes and Sleep spindles appear. heart rate slow body temperature decreases 65 percent of our sleep eye movement is stopped
Stage 3 and 4 sleep
delta waves appear and most deep sleep in here, alcohol suppresses delta wave sleep
Stage 5 REM Sleep
we return to stage 2 our brains shift dramatically into high gear, with high frequency, low amplitude waves like we are awake. Stage 5 REM Sleep Stage1-4 NREM sleep. vivid dreaming. After 10 20 minutes we repeat the cycle. Paradoxial sleep brain is active but body is not
Lucid Dreaming
Being aware of dreaming. Brain parts of cerebal cortex -associated with self perception and evaluating thoughts and feelings- rev up with activity
Insomnia
Difficulty falling or stayin asleep
Narcolepcy
Characterized by the rapid and often unexpected onset of sleep, cataplexy -complete loss a muscle tone. Orexin, a hormone that plays a key role in triggering sudden attacks of sleepiness
Sleep apnea
disorder caused by blockage of the airway during the sleep
