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31 Cards in this Set
- Front
- Back
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Name all stages of sleep |
NREM stage 1 NREM stage 2 NREM stage 3 NREM stage 4 REM |
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brain waves in NREM Stage 1 |
-alpha & theta waves -high & medium frequency -low and medium amplitude |
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Physiological signs in NREM stage 1 |
-Heart rate, respiratory rate, & body temp begins to decrease -muscle contraction still evident |
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Amount of time spent in NREM stage 1 |
Typically about 5-10 mins but varies |
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Ease of waking in NREM stage 1 |
If woken, may feel as if we haven't been asleep (very easy) |
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Mental activity in NREM stage 1 |
Very high |
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Key characteristics in NREM stage 1 |
Muscles relaxation may cause 'Hypnic jerk' -jerking sensation whereby our body or part of our body seems to go into a spasm |
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Brain waves in NREM stage 2 |
-mainly theta -medium frequency and amplitude |
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Physiological signs during NREM stage 2 |
-movements, BP (blood pressure), temp decrease -breathing more regular -slower heart rate - occasional muscle contraction |
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Ease of waking in NREM stage 2 |
Easy |
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Amount of time spent in NREM stage 2 |
Typical about 10-20 mins |
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Mental activity in NREM stage 2 |
High |
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Key characteristics in NREM stage 2 |
-sleep spindles: brief burst of higher frequency waves-shoes true sleep -k-complex: bursts of low freq, higher amp waves -response to stimuli |
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Brain waves in NREM stage 3 |
-theta & delta waves appear -medium and low frequency -medium and high amplitude |
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Physiological signs in NREM Stage 3 |
-heart rate , blood pressure & body temp continue to drop -breathing rate cont. to be slow -steady to minimal muscle activity |
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Ease of waking in NREM stage 3 |
Difficult to wake, if awoken often groggy & disoriented |
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Amount of time spent in NREM stage 3 |
Typically about 5-10 mins, but varies |
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Mental activity in NREM stage 3 |
Low |
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Key characteristics in NREM stage 3 |
Slow wave sleep-slower frequency. Delta waves appear (first time there are delta waves) |
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Brain waves in NREM stage 4 |
-Delta -low frequency -high amplitude |
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Physiological signs in NREM stage 4 |
No muscle activity |
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Ease of waking in NREM stage 4 |
Very difficult -sleep inertia if woken |
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Amount of time spent in NREM stage 4 |
Typically about 5-10 mins, but varies |
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Mental activity in NREM stage 4 |
Minimal |
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Key characteristics in NREM stage 4 |
Night terror (wake up screaming for no reason ) |
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Brain waves in REM |
-Beta waves -very high frequency -low amplitude |
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Physiological signs in REM |
-arm/leg muscles are paralysed -high activity of eye movement -heart rate faster & irregular -BP & breathing rate rises |
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Ease of waking in REM |
-Both easy & difficult |
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Amount of time spent in REM |
Typically about 5-10 mins, but varies |
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Mental activity in REM |
very high |
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Key characteristics in REM |
-high level of activity of eye muscles -paradoxical sleep (Body appears inactive although brain is very active) |
