Chapter 5 Flashcards
consciousness
our awareness of internal and external stimuli
external Stimulus
actions and environment
internal stimulus
thoughts and feelings
levels of awareness
unconscious, stream of consciousness, sleep/dreaming
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
mind wandering
peoples experience of task-unrelated thoughts, spend 15-50%, can sometimes be beneficial
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
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
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
EEG patterns
beta, alpha, theta, delta
Beta
frequency; 13-24
state of consciousness: normal waking thought, alert problem solving
Alpha
Frequency: 8-12
state of conscious: deep relaxation, blank mind, meditation
Theta
Frequency: 4-7
State of conscious: light sleep
delta
Frequency: less than 4
state of conscious: deep sleep
Circadian Rhythms
24 hr biological cycle (internal clock that regulates functions), consciousness is shaped by biological rhythms
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
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
Sport team jet lag experiment
when team did not travel won 46% games, when they flew west; 44%, when they flew east; 36%
physiological pathways
light levels–> retina–> suprachiasmatic nucleus of hypothalamus–> pineal gland–> secreation of melatonin
Melatonin
get released when light levels are lower, will increase drowsiness which will increase drive to sleep
negative sleep effects from phone
wavelengths of light in the blue range, will affect light levels “night shift” will not affect these light levels
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
sleep/waking research instruments
eeg (electrical brain activity)
electromyograph (muscle activity muscle tone changes during sleep)
Electrooculograph (Eye movements REM)
levels of sleep
stage 1-4 then REM, some stages of sleep linked to memory consolidation
stage one of sleep
small irregular brain waves
stage 2 of sleep
appearance of spindle shaped waves called sleep spindle, procedural tasks, motor based
stage 3 and 4 of sleep
appearance of large, slow delta waves
REM sleep (waves)
Similar to ordinary wakefulness brain waves, associated with dreams, Rapid Eye Movement, complex tasks