Ultradian biological Rhythms Flashcards Preview

A2 Biopsychology AQA Psychology > Ultradian biological Rhythms > Flashcards

Flashcards in Ultradian biological Rhythms Deck (23):
1

Give an example of an Ultradian Rhythm

Sleep: consisting of different stages we pass through more than one cycle per night

2

Sleep is an altered state of consciousness which is broken into five stages of...?

NREM (non-rapid eye movement)
REM ( rapid eye movement)

3

The sleep cycle usually repeats itself about...?

5 times during the night

4

What happens once NREM stages have been reached?

The cycle goes into reverse through to REM sleep

5

How long does one cycle last?

Approximately 90 mins.

6

When is NREM sleep and how many stages is it?

When we first fall asleep
stages through 1-4

7

What waves are displayed on the EEG in stage 1?

Theta

8

What waves are shown after 15ish minutes in Stage 2

Slower delta waves indicating stage 3, followed by four

9

What are stages 3 and 4 also known as?

Slow wave sleep, similar characteristics

10

What are at their lowest points in stage 4?

Blood pressure and heart rate that have been gradually slowing

11

What is most likely to occur in this stage because movement is still possible?

Sleepwalking

12

After the reversal of stages about 75 mins into sleep we enter the...?

REM stage of sleep

13

EEG activities change to similar when awake, what are these waves called?

Fast Alpha Waves

14

We become paraylsed because?

voluntary muscle activity is suppressed

15

What fluctuates and what twitches?

Heart rate, blood pressure and respiration.
Muscles

16

What is most likely to occur in this stage?

Dreaming

17

Later cycles include what?

More stage 2 and REM

Less SWS

18

Dement and Kleiltmen supporting evidence?

9 ppts monitored in sleep lab recording brain wave activity and self reported dream recollections (woken up at different stages)

Dreaming REM sleep and brain activity = how vivid dream is

Direction of eye movement = content of dream in REM sleep

19

How is sleep an example of an Ultradian Ryhthm?

consists of 5 separate and distinct stages, categorised by different brainwave activity

20

What practical applications does research on ultradian rhythms have?

EEg recordings revealed similar 90 min cycle during wake hrs

Basic Rest Activity Cycle: period of alertness followed by physiological fatigue

21

What impact could this have on students work habits?

Used in timetabeling, lessons taking place during 'optimal alertness', improving exam success

22

What impact could this have on employees work habits?

ensure sufficient breaks are given = ensuring maximum productivity

23

How does research into infradian rhythms impact the economy?

Positive implication.