Psych Chapter 3 Conciousness, Sleep, Dreams

Topics: Sleep, Electroencephalography, Brain Pages: 7 (1112 words) Published: October 1, 2014
Consciousness: awareness of the outside world and one’s own mental processes, thoughts, feelings, and perceptions But, there is much non-conscious information we are not aware of that our brain is processing, but we are processing Dual processing: conscious and unconscious

Ex: typing my notes – I don’t tell each finger where to go, but my brain is processing that Ex: girl getting EEG, a spike appears on it, .25 seconds later your hand moves without you knowing, .35 seconds later you become aware that you moved your hand Cocktail party effect: you are talking to one person at a party, and you suddenly hear your name, so you turn your head – your brain was unconsciously processing multiple conversations in the room, then once your name is called, your brain brings it to consciousness Consciousness: not much info, but we are aware of it and it can immediately guides our actions Non-conscious: massive amount of sensory information, but you are unaware (unless brought to consciousness) - Selective attention: focusing you consciousness on a single thing - Inattention Blindness: information that is not attended too – you are “blind to it” - Change blindness: your inability to detect when things change in your environment

Sleep: body regulated function that happens on a circadian rhythm Circadian rhythm: occurs on a 24 hour cycle and include sleep and wakefulness. Termed our “biological clock”, and it can be altered by artificial light Melatonin: makes us sleep

The older we get, the less melatonin we get, which makes us sleep less as we are older Released by pineal gland
Light triggers the suprachiasmatic nucleus to decrease (morning) melatonin from pineal gland and increase (evening) it at nightfall Sleep theories:
Protects us
Helps us recover
Helps us remember
May play a role in growth process
Sleep deprivation:
Fatigue and subsequent death
Impaired concentration
Emotional irritability
Depressed immune system
Greater vulnerability
Sleep Stages: as you progress from 14 your wave frequencies decrease 1. show regular alpha waves (9-14 cycles per second – measures frequency). A mediating person exhibits an alpha brain activity 2. Theta waves (5-8 cps). A person who is daydreaming shows theta activity – light sleep has bursts of high activity every couple minutes – called spindle 3-4. Delta Waves (1.5-4 cps) during deepest sleep, brain activity slows down sleep walking occurs in stage 4

5. Dream stage – Rem Sleep: The brain engages in low amplitude, fast regular Beta waves (15-40 cps) much like awake-aroused state a person during this sleep exhibits Rapid Eye Movement and reports vivid dreams REM sleep periods increase as the night progresses

Memory gets stronger during REM
The older you get, the less REM sleep you get
if you’re awoken during stage 5, you’ll remember your dream if awoken during any other, you won’t remember your dream from before Dreams:
Intense emotion
Illogical thought
Uncritical acceptance: it all makes sense to you while in the dream Difficulty remembering: they fade incredibly rapidly
Freud was really into dreams
Theories of why we think we dream
Wish fulfillment (Freud)
“psych safety value”
information-processing function
organizing and filing away the day’s information
Physiological function (preservation)
Activation-synthesis (making sense of neural noise)
Probably most accurate
A mix of the two above
Hypnosis: a social interaction in which one person (the hypnotist) suggests to another (the subject) that certain perceptions, feelings, thoughts, or behaviors will spontaneously occur Its not bad

Two parties have to come to agreement
We are well aware of it
Those who practice hypnosis agree that its power resides in the subject’s openness to suggestion People who are gullible are more likely to be hypnotized
Anyone can experience hypnosis to some extent
Hypnosis cannot enhance recall of forgotten events
Hypnosis cannot force people to act...
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