Sleep

Question 1

neural control of circadian rhythms

Answer 1

suprachiasmatic nucleus of the hypothalamus

Question 2

the first three stages of sleep (N1, N2 and N3) are nonrapid eye movement sleep or _________

Answer 2

synchronized sleep

Question 3

the NREM-REM cycle is repeated at about _____ times during the night

Answer 3

4-6 times

Question 4

In the latter portion of a night’s sleep, the cycles consist essentially of two alternating stages -

Answer 4

REM and stage N2 (spindle-K complex)

Question 5

sleep in Newborns

Answer 5

cycle lasts about 60 min
50% in REM
50% in NREM

Question 6

Sleep cycle in young adults

Answer 6

cycle 90-100 mins
20-25% in REM sleep
3-5% in N1
50-60% in N2
10-20% in N3

Question 7

T/F

Persons older than 70years of age have virtually no very deep slow-wave sleep.

Answer 7

True

Question 8

T/F

Cortical neurons tend to discharge in synchronized bursts during NREM sleep and in nonsynchronized bursts during wakefulness.

Answer 8

True

Question 9

T/F

Tonic muscle activity is minimal during REM sleep.

Answer 9

True

Question 10

T/F

Gross body movements are minimal during transition between REM and NREM sleep.

Answer 10

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.

Question 11

T/F

During sleep, the decline in temperature occurs mainly during the NREM period.

Answer 11

true

the same is true for heartbeta and respiration

Question 12

T/F

Cerebral blood flow and oxygen consumption in muscle diminish during NREM sleep and increase during REM sleep.

Answer 12

True

p399

Question 13

T/F

During REM sleep, metabolism and blood flow are restored to the levels of the waking state.

Answer 13

True

p400