sleep Flashcards
(44 cards)
non-restorative sleep
sleep that is of adequate duration but does not result in feeling refreshed and alert the next day
fragmented sleep:
frequent arousal or actual awakenings that interrupt sleep
insufficient sleep:
obtaining less than the recommended amount of sleep (7-8 hours)
our sleep wake cycle is controlled by our ____
brain
act of being awake is controlled by our ________
RAS (reticular activating system) and other neurotransmitters in our brain. (orexin)
low levels of orexin in ___ patients
narcaleptic
orexin is found in the
hypothalamus of brain
activation of the RAS causes ____ & _____
alertness and attention
sleep disorders:
insomnia and narcloepsy
sleep:
state in which an individual lacks conscious awareness of environmental surroundings but can easily aroused
circadian rhythm
biologic rhythm of behavior and physiology in a 24 hour period
____ is an important cue for sleep-fullness versus wake-fullness
light
____ is our strongest time cue for our sleep/wake rhythm
light
circadian rhythm is managed by the _____ in the hypothalamus
suprachiasmatic nucleus
REM sleep vs non-REM sleep
rapid eye movement, majority of our time is spent in non-rem sleep
sleep latency:
when a person is beginning to fall asleep and ends when non-REM sleep is entered, time varies usually 10-40 minutes
Non-REM sleep is ____ to ____ of sleep time
75-80%
parasomnias:
unusual and often undesirable behaviors while falling asleep, transitioning between sleep stages, or during arousal from sleep. due to CNS activation
types of parasomnias:
sleep walking, sleep terrors, nightmares, sleep paralysis, sleep hallucinations
REM sleep:
20 to 25%, occurs 3 to 4x a night, greatly reduced skeletal muscle tone, and period when most vivid dreaming occurs
acute insomnia:
difficulty falling asleep or remaining asleep for at least 3 nights/week for less than a month
chronic insomnia:
same symptoms as acute, daytime symptoms that persist for 1 month or longer
ICU psychosis:
so many lights/alarms/procedures where a patient can’t determine whether it is day or night time.
alcohol ______ your amount of REM sleep, causing ____ sleep
decreases; fragmented