SLEEP Flashcards
the most common altered state people experience is the one they spend about a third of their lives in on a nightly basis
sleep
once referred to as “the gentle tyrant”
Sleep
one of the human body’s biological rhythms, natural cycles of activity that the body must go through.
Sleep
circadian rhythm
sleep–wake cycle
cycle that takes “about a day” to complete.
circadian rhythm
comes from two Latin words, circa (“about”) and diem (“day”)
circadian rhythm
controlled the sleep-wake cycle
brain (hypothalamus)
the tiny section of the brain that influences the glandular system
hypothalamus
a hormone normally secreted by the pineal gland
melatonin
the internal clock that tells people when to wake up and when to fall asleep
suprachiasmatic nucleus or SCN
is influenced the secretion of melatonin by a structure deep within the tiny hypothalamus
suprachiasmatic nucleus
or SCN
secrete melatonin, located in the base of the brain
pineal gland
sensitive to changes in light
daylight fades, the ____ tells the pineal gland to secrete melatonin
SCN or Suprachiasmatic nucleus
used to treat a condition called jet lag
melatonin supplements
body’s circadian rhythm has been disrupted by traveling to another time zone
jet lag
active during wakefulness, less active during SWS (Slow wave sleep) , and relatively inactive during REM
serotonin-producing neurons
other neurotransmitters are associated
with arousal and sleep regulation
serotonin
part of the hypothalamus, controls body temperature
suprachiasmatic nucleus
body temperature which makes people more alert
higher body temperature
body temperature which makes people sleepy
lower body temperature,
may be responsible for resetting the body’s biological “clock” to a 24-hour cycle every day.
suprachiasmatic nucleus
brief sidesteps into sleep lasting only seconds
microsleeps
enhances the synaptic connections among neurons, thus increasing the plasticity of the brain
sleep
the brain’s ability to adapt to experiences
plasticity of the brain
trembling hands, in-attention, staring off into space, droopy eyelids, and general discomfort, irritability and even depression.
symptoms of sleep depriivation