Sleep Flashcards

1
Q

neural control of circadian rhythms

A

suprachiasmatic nucleus of the hypothalamus

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2
Q

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

A

synchronized sleep

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3
Q

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

A

4-6 times

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4
Q

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

A

REM and stage N2 (spindle-K complex)

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5
Q

sleep in Newborns

A

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

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6
Q

Sleep cycle in young adults

A
cycle 90-100 mins
20-25% in REM sleep
3-5% in N1
50-60% in N2
10-20% in N3
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7
Q

T/F

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

A

True

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8
Q

T/F

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

A

True

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9
Q

T/F

Tonic muscle activity is minimal during REM sleep.

A

True

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10
Q

T/F

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

A

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.

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11
Q

T/F

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

A

true

the same is true for heartbeta and respiration

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12
Q

T/F

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

A

True

p399

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13
Q

T/F

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

A

True

p400

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