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1

consciousness

our awareness of internal and external stimuli

2

external Stimulus

actions and environment

3

internal stimulus

thoughts and feelings

4

levels of awareness

unconscious, stream of consciousness, sleep/dreaming

5

sleep/ dreaming consciousness

when we are sleeping we are not totally unaware of what is happening around us, external factors can affect dreams can also wake us up

6

mind wandering

peoples experience of task-unrelated thoughts, spend 15-50%, can sometimes be beneficial

7

conscious vs unconscious thought

benefit to allowing the back of our mind to decide, focus on something else and let our conscious decide for us

8

Dijksterhuis 2004

choosing a roommate:
one group: 4 min conscious thought to choosing roommates
other group: 4 min demanding task, unconscious thought no time to review
people given the demanding task, made a better choice and retained more information

9

EEG

brain electrical activity, uses physiological index of consciousness, brain waves; amplitude and frequency. bind electrodes to the scalp and pick up on the potentials happening in the brain. depending on what your doing different brain activity occurs

10

EEG patterns

beta, alpha, theta, delta

11

Beta

frequency; 13-24
state of consciousness: normal waking thought, alert problem solving

12

Alpha

Frequency: 8-12
state of conscious: deep relaxation, blank mind, meditation

13

Theta

Frequency: 4-7
State of conscious: light sleep

14

delta

Frequency: less than 4
state of conscious: deep sleep

15

Circadian Rhythms

24 hr biological cycle (internal clock that regulates functions), consciousness is shaped by biological rhythms

16

ignoring circadian rhythms

cause a "sleep dept", not ideal to ignore the rhythms but eventually our bodies will want that sleep dept to be paid, associated with negative effects

17

Jet Lag

as soon as we go tot different time zones rhythms will be disrupted, ignoring circadian rhythms, each time you cross a zone, you need a day to get used to it, expose yourself to natural light to adjust yourself

18

Sport team jet lag experiment

when team did not travel won 46% games, when they flew west; 44%, when they flew east; 36%

19

physiological pathways

light levels--> retina--> suprachiasmatic nucleus of hypothalamus--> pineal gland--> secreation of melatonin

20

Melatonin

get released when light levels are lower, will increase drowsiness which will increase drive to sleep

21

negative sleep effects from phone

wavelengths of light in the blue range, will affect light levels "night shift" will not affect these light levels

22

melatonin and circadian rhythms

very specific dose of melatonin to adjust to time zone but its best to expose yourself to natural light and adjust naturally

23

sleep/waking research instruments

eeg (electrical brain activity)
electromyograph (muscle activity muscle tone changes during sleep)
Electrooculograph (Eye movements REM)

24

levels of sleep

stage 1-4 then REM, some stages of sleep linked to memory consolidation

25

stage one of sleep

small irregular brain waves

26

stage 2 of sleep

appearance of spindle shaped waves called sleep spindle, procedural tasks, motor based

27

stage 3 and 4 of sleep

appearance of large, slow delta waves

28

REM sleep (waves)

Similar to ordinary wakefulness brain waves, associated with dreams, Rapid Eye Movement, complex tasks

29

Hypnic Jerk

muscle spasm as your falling asleep

30

Trends in SLeep

age differences: different amount of sleep required for people of different ages, cultural differences: napping practices