Lecture 6-Consciousness - Lecture 6: Consciousness What is...

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Unformatted text preview: Lecture 6: Consciousness What is consciousness? What are you really aware of? Split Brains Blindsight Hypnosis Meditation ˜Drugs and the Brain *Attention capacities are limited; no memory of mast majority of happening right in front of our eyes •Consciousness -I think, therefore I am -Consciousness is one of the great mysteries of psychology -Definition: The subjective experience of the world and of mental activity Level: Sleep? Coma? War Craft-in-the-zone??? Content: What are you consciously aware of? *Color changing card trick- 4 other color changes •What are you conscious of?: adaptive to surviveare slaved to attention -The fact you are alive -The weight of your shirt on you back -your butt on your seat -The sound of the projector ð FW L ; ¨ Ô w¶ ª .-eyes •Com ¶ s —v rious st s og ons iousn ss SlC kw ˜ o Ì ª y l€ s Oo n y@sQ oo m to r yk w Clos yt oom to sE r 7 sl @ o o r*soonsE to surroun j inQ s >A mont @ oErsistnt v t° ƒ tiv ˜rFin st ¶xists m l ss lik@ ly to m t out ˜ut m* jority on€ * st o7 om @ Qt •Ar ooolt in om s ons7 ious? •Lo k in o kÌ n Aw r AwF n l to ommuni t xý or @@ ot p NË Duµ to múË € ᥠ* to t Ì v ntr l oons TQ p E DivinQ B ll unE t Butt r ly— Jo n Bo· iL link @ y@ s to ommuni tƒN oointinQ to l ttrs oN tË loQ * t u ont s to writu E Qm mÓ moir ys E tE womu E n Lisy Smit yª * rs o Erik R msQ y r om Ì w ú n t lk m in st m injury olQ nt lQ tro ïE à s in t P so r — on ·i Ðu miso ru w nt to tr nsl— t 2 o tt rn oú *r Q tª tivity to ª so€ˆ ˜ñ µ‡ •TðSolit Br in F Du @ to stizur (ollosum s v r 8 o lª *t in som ooolý * vp tE orous ( Therefore, the two hemispheres can no longer communicate… *The interpreter: chickens, stand up, phone •Blind Sight- corpus collosum severed Due to damage in the visual system, people may report seeing nothing, while still having some spared visual capacities.---visual information cannot be processed •Hemisphere/Spatial Neglect- due to stroke Often due to damage to the right parietal lobe, -lose left side of the world leading to neglect of visual information from the left side of space. •Alt r StQ t s oa Cons iousn ss s w n ool @ sin t ly u n oortion is on t € l t si 8 •Hyonosis =No identifiable physiological state between hypnosis and relaxation -Individual differences in susceptibility. -Social context that will allow you to behave as directed *What about post-hypnotic suggestions? h Context in which you may behave in ways different from other social contexts—but you won’t do anything you wouldn’t do if not hypnotized. *Can memory be enhanced by hypnosis? Yes, but performance enhancement not any better than relaxation Memory retrieval of traumatic event can be enhanced… BUT, it also increases confabulation and confidence of false memory Memories retrieved during hypnosis not admissible in CA courts • Hyonosis Ó or P i n SF ms Ð ˜C tiv € Ѷ w -Does not affect sensory processing of pain, but changes the interpretation of the pain. Ø Ñ w ¶ªL - € ˆ ‡ µª ¥t ú Ë Ì, -Dissociation theory of hypnosis: -The hypnotic state is an altered state in which the conscious awareness is separated from other parts of consciousness • Hypnosis-Subliminal Messages • Meditation =A mental procedure that focuses attention on an external object or on a sense of awareness. -Concentrative: focus on one thing (ex. Breathing, focusing on heart beat -Mindfulness: let your thought flow free *Benefits: anxiety, blood pressure, heart beat •Drugs in our Society 1. Caffeine: Antagonist for adenosine (amino acid that facilitates sleep). -Acts as a general stimulant: increases blood pressure, heart rate, arousal (most used psychoactive drug). 2. Alcohol: General CNS depressant. -Impairs judgment, motor coordination. -Abuse, particularly binge drinking, leads to cortical (cells in the cortex) atrophy- cerebellar dysfunction; -50% deaths from car accidents due to drunk driving (second most used psychoactive drug). 3. Nicotine: -Stimulant that mimics ACH synapses, increases HR, blood pressure. -Can induce relaxed feelings, perhaps due to influence on DA (rewarding and addictive). -Can lead to heart attack, stroke, lung cancer. 4. Marijuana: THC (tetrahydrocannabinol), acts on ―cannabinoid‖ receptors (natural transmitter, anandamide). hCauses relaxation, reduces coordination, blood pressure, appetite; disrupts attention and memory. h *Benefits: Relieves pain; Stimulates eating-used for chemotherapy 5. Cocaine: NE, DA, 5-HT dopamine agonist (blocks reuptake), increases blood pressure, HR, arousal. Addictive due to DA and reward system (rat barpress expt), overdose can lead to cardiac arrest, stroke. 6. LSD: Lysergic acid diethylamide, mimics 5-HT and causes severe alteration of consciousness, hallucinations, paranoia and other schizophrenic-like symptoms. 7. MDMA (Ecstasy): Methylene-dioxy-methamphetamine, a 5-HT and DA agonist initially used as appetite suppressant but then found to cause long-lasting neuronal damage. Abuse causes cell loss in cerebral cortex and basal ganglia -flooding brain with serotonin- afterwards---depression ...
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This note was uploaded on 10/28/2010 for the course PSYCH 2 taught by Professor Don'tremember during the Fall '04 term at University of California, Berkeley.

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