Sleep Flashcards
neural control of circadian rhythms
suprachiasmatic nucleus of the hypothalamus
the first three stages of sleep (N1, N2 and N3) are nonrapid eye movement sleep or _________
synchronized sleep
the NREM-REM cycle is repeated at about _____ times during the night
4-6 times
In the latter portion of a night’s sleep, the cycles consist essentially of two alternating stages -
REM and stage N2 (spindle-K complex)
sleep in Newborns
cycle lasts about 60 min
50% in REM
50% in NREM
Sleep cycle in young adults
cycle 90-100 mins 20-25% in REM sleep 3-5% in N1 50-60% in N2 10-20% in N3
T/F
Persons older than 70years of age have virtually no very deep slow-wave sleep.
True
T/F
Cortical neurons tend to discharge in synchronized bursts during NREM sleep and in nonsynchronized bursts during wakefulness.
True
T/F
Tonic muscle activity is minimal during REM sleep.
True
T/F
Gross body movements are minimal during transition between REM and NREM sleep.
False
Gross body movements occur every 15 min or so in all stages of sleep but are maximal in the transition between REM and NREM sleep, at which time sleeping person changes position.
T/F
During sleep, the decline in temperature occurs mainly during the NREM period.
true
the same is true for heartbeta and respiration
T/F
Cerebral blood flow and oxygen consumption in muscle diminish during NREM sleep and increase during REM sleep.
True
p399
T/F
During REM sleep, metabolism and blood flow are restored to the levels of the waking state.
True
p400