Flashcards in Chapter 5 Deck (72)
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consciousness
our awareness of internal and external stimuli
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external Stimulus
actions and environment
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internal stimulus
thoughts and feelings
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levels of awareness
unconscious, stream of consciousness, sleep/dreaming
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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
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mind wandering
peoples experience of task-unrelated thoughts, spend 15-50%, can sometimes be beneficial
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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
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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
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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
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EEG patterns
beta, alpha, theta, delta
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Beta
frequency; 13-24
state of consciousness: normal waking thought, alert problem solving
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Alpha
Frequency: 8-12
state of conscious: deep relaxation, blank mind, meditation
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Theta
Frequency: 4-7
State of conscious: light sleep
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delta
Frequency: less than 4
state of conscious: deep sleep
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Circadian Rhythms
24 hr biological cycle (internal clock that regulates functions), consciousness is shaped by biological rhythms
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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
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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
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Sport team jet lag experiment
when team did not travel won 46% games, when they flew west; 44%, when they flew east; 36%
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physiological pathways
light levels--> retina--> suprachiasmatic nucleus of hypothalamus--> pineal gland--> secreation of melatonin
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Melatonin
get released when light levels are lower, will increase drowsiness which will increase drive to sleep
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negative sleep effects from phone
wavelengths of light in the blue range, will affect light levels "night shift" will not affect these light levels
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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
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sleep/waking research instruments
eeg (electrical brain activity)
electromyograph (muscle activity muscle tone changes during sleep)
Electrooculograph (Eye movements REM)
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levels of sleep
stage 1-4 then REM, some stages of sleep linked to memory consolidation
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stage one of sleep
small irregular brain waves
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stage 2 of sleep
appearance of spindle shaped waves called sleep spindle, procedural tasks, motor based
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stage 3 and 4 of sleep
appearance of large, slow delta waves
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REM sleep (waves)
Similar to ordinary wakefulness brain waves, associated with dreams, Rapid Eye Movement, complex tasks
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Hypnic Jerk
muscle spasm as your falling asleep
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