NREM sleep Flashcards

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1
Q

NREM

A

non-rapid eye movement sleep

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2
Q

NREM stage 1
duration

A

duration - av of 5 mins, 4-5% of total sleep time, may be skipped

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3
Q

NREM stage 1
EOG

A

some slow, rolling eye movements

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4
Q

NREM stage 1
EEG

A

overall start to slow down

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5
Q

NREM stage 1
EMG

A

decrease in muscle tone and activity, some muscle twitches

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6
Q

NREM stage 1
HR / BT / BR

A

All decrease

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7
Q

NREM stage 1
Any distinguishing features

A

Arousal threshold is low (the lowest for entire sleep episode)

aware of faint sounds

if woken may feel like we haven’t slept at all

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8
Q

NREM stage 2
Duration

A

10-25 mins and lengthens with each successive cycle

makes up about half of the total sleep episode

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9
Q

NREM stage 2
EOG

A

eye movements stop

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10
Q

NREM stage 2
EEG

A

overall slower = mostly theta

periodic bursts of rapid activity (sleep spindles) indicate true sleep onset

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11
Q

NREM stage 2
EMG

A

little muscle tension/movement

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12
Q

NREM stage 2
HR / BT / BR

A

BR more regular / HR slower / BT slightly decreases

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13
Q

NREM stage 2
Any distinguishing features

A

higher arousal threshold than stage 1

a period of light sleep, sometimes described as moderate sleep because it gradually becomes deeper.

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14
Q

NREM stage 3
Duration

A

20-40 mins [depending on age]
10 to 15% of total sleep time.
les and less time is spent in this stage

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15
Q

NREM stage 3
EOG

A

no eye movements

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16
Q

NREM stage 3
EEG

A

called slow wave sleep or delta sleep

17
Q

NREM stage 3
EMG

A

less muscle tension/movement

18
Q

NREM stage 3
HR / BT / BR

A

heart rate and body temp continue to decrease
Breathing rate is steady

19
Q

NREM stage 3
Any distinguishing features

A

deepest sleep
highest arousal threshold - difficult to awaken

Sleep drunkenness / Sleep inertia - if awoken may be disoriented