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Psychology > Sleep Cycle > Flashcards

Sleep Cycle Flashcards

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1
Q

How many stages?

A

4

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2
Q

Describe order of events (5)

A
  • starts at stage 1
  • progresses to stages 2, 3 and 4
  • stage 2 and 3 repeated
  • REM sleep
  • Returns to stage 2
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3
Q

How many sleep cycles do we have a night?

A

4-5

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4
Q

When do we enter REM sleep?

A

approx. 90 mins after falling asleep

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5
Q

What kind of sleep is stage 1?

A

relatively light

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6
Q

What is stage 1 a transition period between?

A

Wakefulness and sleep

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7
Q

What is produced during stage 1? What are these?

A

Hight amplitude theta waves=very slow brain waves

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8
Q

How long does stage 1 last?

A

5-10 mins

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9
Q

How long does stage 2 last?

A

approx. 20 mins

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10
Q

What does the brain start producing during stage 2? What are these?

A

Sleep spindles-bursts of rapid rhythmic brain wave activity

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11
Q

What 2 things start to decrease during stage 2?

A
  • Body temp

- Heart rate

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12
Q

What is produced in stage 3? what are these?

A

Delta waves- deep, slow brain waves

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13
Q

What is stage 3 a transitional period between?

A

light and very deep sleep

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14
Q

what is stage 4 aka? why?

A

delta sleep because of the slow delta brain waves produced during it

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15
Q

how long does stage 4 last?

A

approx. 30 mins

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16
Q

when does most dreaming occur?

A

stage 5

17
Q

what kind of sleep is stage 5?

A

rapid eye movement (REM)

18
Q

What increases during stage 5? (2)

A
  • respiration rate

- brain activity

19
Q

how many REM episodes a night?

A

3-5

20
Q

what becomes more active during stage 5?

A

brain and body systems

21
Q

what becomes relaxed during stage 5?

A

muscles

22
Q

what becomes paralysed during stage 5?

A

voluntary muscles

23
Q

what does stage 5 make up? (percentage and total times)

A
  • 20-25%

- 90-120 mins

Psychology (11 decks)

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