Biological Rhythms - Ultradian Rhythms Flashcards by Hannah Cabural | Brainscape

Q

Name examples of ultradian rhythms

A

stages of sleep

basic rest-activity cycle (BRAC)

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Q

How are the stages of sleep measured?

A

EEG’s

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Q

how long does a sleep cycle take?

A

90 minutes

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Q

how many sleep cycles are there?

A

5

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Q

Stages of sleep - describe stage 1 & 2

A

light sleep
easy to wake

no dreaming

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Q

Stages of sleep - stage 1 & 2 - brain waves seen

A

alpha

theta

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Q

Stages of sleep - describe stage 3 & 4

A

Deep slow wave sleep
difficult to wake someone up

no dreaming

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Q

Stages of sleep - stage 3 & 4 - brain waves seen

A

delta

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Q

Stages of sleep - describe stage 5 (REM sleep)

A

sped up brain activity
paralysed body

dreaming

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Q

Stages of sleep - stage 5 - brain waves seen

A

similar to someone whos awake

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Q

BRAC - what did Kleitman (1969) suggest?

A

90 minute cycle when we’re awake

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Q

what is BRAC characterised by?

A

period of feeling alert

followed by time of physiological fatigue

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Q

name example that supports BRAC

A

difficult to concentrate for more than 90 mins

Ericsson et al (1993)
Violinists practise for 3x 90 min sessions

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