Module 5.1 - Sleep Flashcards Preview

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Flashcards in Module 5.1 - Sleep Deck (76)
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1

consciousnes

a persons subjective awareness, including thoughts, perceptions, experiences of the world and self-awareness

2

moment to moment experiences

consciousness

3

can we experience altered states of consciousness?

Yes

4

true or false: mental activity only occurs when we are conscious

FALSE: mental activity can occur even when we are not conscious

5

Biological rhythms

patterns of behaviour - ranging from hormones to over actions - that cycle within days, weeks, months or years

6

what are biological rhythms often adapted to?

cycles in an organisms environment

7

what are the 3 types of biological rhythms?

1) Infradian rhythm
2) Ultradian rhythm
3) Circadian rhythms

8

Infradian rhythm

any rhythm that occurs over a period of time longer than a day

9

circannual rhythm means what?

literally means "a yearly cycle"

10

what is an example of the infradian rhythm?

menstrual cycle

11

ultradian rhythm

any rhythm that occurs more frequently than once a day

12

what is an example of the ultradian rhythm?

heart rate, urination and some hormonal activity occurs in 90-120 minute cycles

13

circadian rhythms

internally driven daily cycles of approx 24 hours affecting the physiological and behavioural processes

14

what is an example of the circadian rhythms?

sleep-wake cycle and fluctuations in hunger

15

suprachiasmatic Nucleus (SCN)

a part of the hypothalamus that receives input from the retina about light levels

16

what gland does the Suprachiasmatic Nucleus (SCN) communicate with?

Pineal gland

17

what hormone does the pineal gland release?

melatonin

18

melatonin

a sleep related hormone whose levels peak at night time and are reduced during wakefulness

19

where does information about melatonin go?

hypothalamus

20

entrainment

when biological rhythms become synchronized to external cues such as light, temperature or even a clock

21

endogenous rhythms

biological rhythms that are generated by our body independent of external cues such as light

22

what does your degree of alertness depend on?

where you are in your circadian rhythm

23

as people age they tend to require less sleep, particularly from the stage known as _________.

REM sleep

24

what are the 2 ways of measuring sleep?

polysomnography and electroencephalography (EEG)

25

Polysomnography

a set of objective measurements used to examine physiological variables during sleep

26

what can polysomnography include?

heart rate, eye movements, respiration rate, muscle contractions and brain activity

27

Electroencephalography (EEG)

a device that measures brain waves using sensors attached to the scalp. these waveforms are described by their frequency and amplitude

28

how do the stages of sleep in humans work?

humans move from stage 1 through stage 4 and then cycle back to stage 1

29

REM sleep

a stage of sleep characterized by quickening brain waves inhibited body movement and rapid eye movements (REM)

30

Stage 4 sleep

= "deep sleep"