Ultradian Rhythms

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Within the sleep cycle an example of ultradian rhythms exist - the ---- stages of sleep.
Five
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The first four stages of sleep are called NREM sleep (----rapid eye movement).
Non
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The fifth stage of sleep are called --- sleep, so called because of the accompanying movements of the eye beneath the closed eyelids.
REM
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One sleep cycle goes through all five stages and lasts about ------ minutes
Ninety
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The awake brain produces a typical pattern called a ---- wave.
Beta
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Stages 1 & 2 = light sleep, characterised by a change in ---------- activity of the brain - as you become more relaxed your brain waves become slower (alpha) & as you go to sleep they become even slower (theta) - heart rate slows & temperature drops.
Electrical
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Stages 3 & 4 = characterised by even slower ----- waves (slow wave sleep) - very hard to wake someone up, although person isn't unconscious - physiological 'repair work' is undertaken & growth hormones are produced.
Delta
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In REM sleep there's fast, desynchronised EEG activity resembling the awake brain - called 'paradoxical sleep' because the brain and eyes are active but the body is ---------.
Paralysed
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The ----- rest-activity cycle (BRAC) - the 90 minute sleep cycle is located within a 24-hour circadian rhythm, so it would make sense to find that this 90 minutes clock was also ticking throughout the day.
Basic
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Who observed eating & drinking behaviour in a group of psychiatric patients over periods of 6 hours & detected a clear 90 minute cycle in eating and drinking behaviour?
Friedman and Fisher
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One issue with studies on REM sleep is the assumption that it is -------- sleep.
Dreaming
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Who woke participants at times their brain waves were characteristic of REM sleep & found they were highly likely to report dreaming? However, they also found dreams were reported when not in REM and when not in REM, sleepers weren't always dreaming.
Dement and Kleitman
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Who proposed that dreams are just a psychological readout of the random electrical typical of REM sleep?
Hobson and McCarley
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The basic rest-activity cycle shows that sleep stages are part of a continuum & the importance of this 90 minute rhythm is probably as a form of timing to ensure that the biological processes of the body work in ------.
Unison
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Other cards in this set

Card 2

Front

The first four stages of sleep are called NREM sleep (----rapid eye movement).

Back

Non

Card 3

Front

The fifth stage of sleep are called --- sleep, so called because of the accompanying movements of the eye beneath the closed eyelids.

Back

Preview of the front of card 3

Card 4

Front

One sleep cycle goes through all five stages and lasts about ------ minutes

Back

Preview of the front of card 4

Card 5

Front

The awake brain produces a typical pattern called a ---- wave.

Back

Preview of the front of card 5
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