Flashcards in Chapter 13 - Sleep And Dreaming Deck (11):
What is diurnal and nocturnal?
1. Organism active during daylight
2. Organism Active in the dark
What is a biological clock?
1. Neural system that times behaviour
2. Allows animals to anticipate events before they occur (birds migrate)
3. Endogenous rhythms from within bt always external
- one controls sleep waking
- one controls functions of body organs
What are all the Biological rythms?
Period - time required to complete a cycle
Circannual - yearly (migration)
Infradian - less than a year (menstrual cycle)
Circadian - daily (sleep cycle)
Ultradian - less than a day (eating)
What are free running rhythms?
Rhythm of the body's own devising in the absence of all external clues
- without external cue our rythms are slightly longer (25-27 hours)
What is a zeitgeber?
Environmental event that entrains/modified biological rhythms (time giver)
Determine or modify he period of a biorhythms
LIGHT POLLUTION - artificial light that changes activity patterns and disrupts circadian rhythms
What is SAD?
Seasonal depressive disorder - a form of depression associated with winter
How does jet lag work?
Fatigue and disorientation from rapid time travel through time-zones and exposure to a changed light-dark cycle
West to east is more difficult
- occasional traveler may cope easily
What are the NREM disorders of sleep?
insomnia - disorder if slow wave sleep.
- prolonged inability to sleep
drug dependency insomnia - resulting from continuous use of sleeping pills. Stop REM SLEEP
Fatal facial insomnia - stop sleeping all together
other then insomnia?
Narcolepsy - slow wave sleep disorder which a person falls asleep at innapropriste times
Sleep apnea - inability to breath during sleep
What are disorders of REM sleep?
Muscle atonia is due to inhibition
Sleep paralysis - form of narcolepsy where you are are unable to move during deep sleep owing to inhibition of motor neurons
Cataplexy - losing all muscle activity as in rem sleep while awake due to emotional stimulation
Hypnogogic hallucinations - dreamlike state at begining of sleep where person is in state of cataplexy